sql_show.cc 126 KB
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/* Copyright (C) 2000-2004 MySQL AB
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   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 2 of the License, or
   (at your option) any later version.
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   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.
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   You should have received a copy of the GNU General Public License
   along with this program; if not, write to the Free Software
   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA */


/* Function with list databases, tables or fields */

#include "mysql_priv.h"
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#include "sql_select.h"                         // For select_describe
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#include "repl_failsafe.h"
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#include "sp_head.h"
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#include <my_dir.h>
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#ifdef HAVE_BERKELEY_DB
#include "ha_berkeley.h"			// For berkeley_show_logs
#endif

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static const char *grant_names[]={
  "select","insert","update","delete","create","drop","reload","shutdown",
  "process","file","grant","references","index","alter"};

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#ifndef NO_EMBEDDED_ACCESS_CHECKS
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static TYPELIB grant_types = { sizeof(grant_names)/sizeof(char **),
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                               "grant_types",
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                               grant_names, NULL};
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#endif
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static int
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store_create_info(THD *thd, TABLE_LIST *table_list, String *packet);
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static int
view_store_create_info(THD *thd, TABLE_LIST *table, String *packet);
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static bool schema_table_store_record(THD *thd, TABLE *table);
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/***************************************************************************
** List all table types supported 
***************************************************************************/

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bool mysqld_show_storage_engines(THD *thd)
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{
  List<Item> field_list;
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  Protocol *protocol= thd->protocol;
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  DBUG_ENTER("mysqld_show_storage_engines");
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  field_list.push_back(new Item_empty_string("Engine",10));
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  field_list.push_back(new Item_empty_string("Support",10));
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  field_list.push_back(new Item_empty_string("Comment",80));
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  if (protocol->send_fields(&field_list,
                            Protocol::SEND_NUM_ROWS | Protocol::SEND_EOF))
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    DBUG_RETURN(TRUE);
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  const char *default_type_name= 
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    ha_get_storage_engine((enum db_type)thd->variables.table_type);
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  show_table_type_st *types;
  for (types= sys_table_types; types->type; types++)
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  {
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    protocol->prepare_for_resend();
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    protocol->store(types->type, system_charset_info);
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    const char *option_name= show_comp_option_name[(int) *types->value];

    if (*types->value == SHOW_OPTION_YES &&
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	!my_strcasecmp(system_charset_info, default_type_name, types->type))
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      option_name= "DEFAULT";
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    protocol->store(option_name, system_charset_info);
    protocol->store(types->comment, system_charset_info);
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    if (protocol->write())
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      DBUG_RETURN(TRUE);
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  }
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  send_eof(thd);
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  DBUG_RETURN(FALSE);
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}

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/***************************************************************************
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 List all privileges supported
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***************************************************************************/

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struct show_privileges_st {
  const char *privilege;
  const char *context;
  const char *comment;
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};

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static struct show_privileges_st sys_privileges[]=
{
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  {"Alter", "Tables",  "To alter the table"},
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  {"Alter routine", "Functions,Procedures",  "To alter or drop stored functions/procedures"},
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  {"Create", "Databases,Tables,Indexes",  "To create new databases and tables"},
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  {"Create routine","Functions,Procedures","To use CREATE FUNCTION/PROCEDURE"},
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  {"Create temporary tables","Databases","To use CREATE TEMPORARY TABLE"},
  {"Create view", "Tables",  "To create new views"},
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  {"Create user", "Server Admin",  "To create new users"},
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  {"Delete", "Tables",  "To delete existing rows"},
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  {"Drop", "Databases,Tables", "To drop databases, tables, and views"},
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  {"Execute", "Functions,Procedures", "To execute stored routines"},
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  {"File", "File access on server",   "To read and write files on the server"},
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  {"Grant option",  "Databases,Tables,Functions,Procedures", "To give to other users those privileges you possess"},
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  {"Index", "Tables",  "To create or drop indexes"},
  {"Insert", "Tables",  "To insert data into tables"},
  {"Lock tables","Databases","To use LOCK TABLES (together with SELECT privilege)"},
  {"Process", "Server Admin", "To view the plain text of currently executing queries"},
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  {"References", "Databases,Tables", "To have references on tables"},
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  {"Reload", "Server Admin", "To reload or refresh tables, logs and privileges"},
  {"Replication client","Server Admin","To ask where the slave or master servers are"},
  {"Replication slave","Server Admin","To read binary log events from the master"},
  {"Select", "Tables",  "To retrieve rows from table"},
  {"Show databases","Server Admin","To see all databases with SHOW DATABASES"},
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  {"Show view","Tables","To see views with SHOW CREATE VIEW"},
  {"Shutdown","Server Admin", "To shut down the server"},
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  {"Super","Server Admin","To use KILL thread, SET GLOBAL, CHANGE MASTER, etc."},
  {"Update", "Tables",  "To update existing rows"},
  {"Usage","Server Admin","No privileges - allow connect only"},
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  {NullS, NullS, NullS}
};

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bool mysqld_show_privileges(THD *thd)
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{
  List<Item> field_list;
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  Protocol *protocol= thd->protocol;
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  DBUG_ENTER("mysqld_show_privileges");

  field_list.push_back(new Item_empty_string("Privilege",10));
  field_list.push_back(new Item_empty_string("Context",15));
  field_list.push_back(new Item_empty_string("Comment",NAME_LEN));

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  if (protocol->send_fields(&field_list,
                            Protocol::SEND_NUM_ROWS | Protocol::SEND_EOF))
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    DBUG_RETURN(TRUE);
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  show_privileges_st *privilege= sys_privileges;
  for (privilege= sys_privileges; privilege->privilege ; privilege++)
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  {
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    protocol->prepare_for_resend();
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    protocol->store(privilege->privilege, system_charset_info);
    protocol->store(privilege->context, system_charset_info);
    protocol->store(privilege->comment, system_charset_info);
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    if (protocol->write())
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      DBUG_RETURN(TRUE);
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  }
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  send_eof(thd);
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  DBUG_RETURN(FALSE);
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}


/***************************************************************************
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  List all column types
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***************************************************************************/

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struct show_column_type_st
{
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  const char *type;
  uint size;
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  const char *min_value;
  const char *max_value;
  uint precision;
  uint scale;
  const char *nullable;
  const char *auto_increment;
  const char *unsigned_attr;
  const char *zerofill;
  const char *searchable;
  const char *case_sensitivity;
  const char *default_value;
  const char *comment;
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};
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/* TODO: Add remaning types */

static struct show_column_type_st sys_column_types[]=
{
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  {"tinyint",
    1,  "-128",  "127",  0,  0,  "YES",  "YES",
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    "NO",   "YES", "YES",  "NO",  "NULL,0",
    "A very small integer"},
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  {"tinyint unsigned",
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    1,  "0"   ,  "255",  0,  0,  "YES",  "YES",
    "YES",  "YES",  "YES",  "NO",  "NULL,0",
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    "A very small integer"},
};

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bool mysqld_show_column_types(THD *thd)
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{
  List<Item> field_list;
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  Protocol *protocol= thd->protocol;
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  DBUG_ENTER("mysqld_show_column_types");

  field_list.push_back(new Item_empty_string("Type",30));
  field_list.push_back(new Item_int("Size",(longlong) 1,21));
  field_list.push_back(new Item_empty_string("Min_Value",20));
  field_list.push_back(new Item_empty_string("Max_Value",20));
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  field_list.push_back(new Item_return_int("Prec", 4, MYSQL_TYPE_SHORT));
  field_list.push_back(new Item_return_int("Scale", 4, MYSQL_TYPE_SHORT));
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  field_list.push_back(new Item_empty_string("Nullable",4));
  field_list.push_back(new Item_empty_string("Auto_Increment",4));
  field_list.push_back(new Item_empty_string("Unsigned",4));
  field_list.push_back(new Item_empty_string("Zerofill",4));
  field_list.push_back(new Item_empty_string("Searchable",4));
  field_list.push_back(new Item_empty_string("Case_Sensitive",4));
  field_list.push_back(new Item_empty_string("Default",NAME_LEN));
  field_list.push_back(new Item_empty_string("Comment",NAME_LEN));

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  if (protocol->send_fields(&field_list,
                            Protocol::SEND_NUM_ROWS | Protocol::SEND_EOF))
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    DBUG_RETURN(TRUE);
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  /* TODO: Change the loop to not use 'i' */
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  for (uint i=0; i < sizeof(sys_column_types)/sizeof(sys_column_types[0]); i++)
  {
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    protocol->prepare_for_resend();
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    protocol->store(sys_column_types[i].type, system_charset_info);
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    protocol->store((ulonglong) sys_column_types[i].size);
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    protocol->store(sys_column_types[i].min_value, system_charset_info);
    protocol->store(sys_column_types[i].max_value, system_charset_info);
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    protocol->store_short((longlong) sys_column_types[i].precision);
    protocol->store_short((longlong) sys_column_types[i].scale);
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    protocol->store(sys_column_types[i].nullable, system_charset_info);
    protocol->store(sys_column_types[i].auto_increment, system_charset_info);
    protocol->store(sys_column_types[i].unsigned_attr, system_charset_info);
    protocol->store(sys_column_types[i].zerofill, system_charset_info);
    protocol->store(sys_column_types[i].searchable, system_charset_info);
    protocol->store(sys_column_types[i].case_sensitivity, system_charset_info);
    protocol->store(sys_column_types[i].default_value, system_charset_info);
    protocol->store(sys_column_types[i].comment, system_charset_info);
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    if (protocol->write())
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      DBUG_RETURN(TRUE);
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  }
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  send_eof(thd);
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  DBUG_RETURN(FALSE);
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}


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int
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mysql_find_files(THD *thd,List<char> *files, const char *db,const char *path,
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                 const char *wild, bool dir)
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{
  uint i;
  char *ext;
  MY_DIR *dirp;
  FILEINFO *file;
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#ifndef NO_EMBEDDED_ACCESS_CHECKS
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  uint col_access=thd->col_access;
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#endif
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  TABLE_LIST table_list;
  DBUG_ENTER("mysql_find_files");

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  if (wild && !wild[0])
    wild=0;
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  bzero((char*) &table_list,sizeof(table_list));

  if (!(dirp = my_dir(path,MYF(MY_WME | (dir ? MY_WANT_STAT : 0)))))
    DBUG_RETURN(-1);

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  for (i=0 ; i < (uint) dirp->number_off_files  ; i++)
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  {
    file=dirp->dir_entry+i;
    if (dir)
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    {                                           /* Return databases */
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#ifdef USE_SYMDIR
      char *ext;
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      char buff[FN_REFLEN];
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      if (my_use_symdir && !strcmp(ext=fn_ext(file->name), ".sym"))
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      {
	/* Only show the sym file if it points to a directory */
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	char *end;
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        *ext=0;                                 /* Remove extension */
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	unpack_dirname(buff, file->name);
	end= strend(buff);
	if (end != buff && end[-1] == FN_LIBCHAR)
	  end[-1]= 0;				// Remove end FN_LIBCHAR
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        if (!my_stat(buff, file->mystat, MYF(0)))
               continue;
       }
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#endif
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        if (file->name[0] == '.' || !MY_S_ISDIR(file->mystat->st_mode) ||
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            (wild && wild_compare(file->name,wild,0)))
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          continue;
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    }
    else
    {
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        // Return only .frm files which aren't temp files.
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      if (my_strcasecmp(system_charset_info, ext=fn_ext(file->name),reg_ext) ||
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          is_prefix(file->name,tmp_file_prefix))
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        continue;
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      *ext=0;
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      if (wild)
      {
	if (lower_case_table_names)
	{
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	  if (wild_case_compare(files_charset_info, file->name, wild))
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	    continue;
	}
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	else if (wild_compare(file->name,wild,0))
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	  continue;
      }
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    }
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#ifndef NO_EMBEDDED_ACCESS_CHECKS
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    /* Don't show tables where we don't have any privileges */
    if (db && !(col_access & TABLE_ACLS))
    {
      table_list.db= (char*) db;
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      table_list.db_length= strlen(db);
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      table_list.table_name= file->name;
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      table_list.table_name_length= strlen(file->name);
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      table_list.grant.privilege=col_access;
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      if (check_grant(thd, TABLE_ACLS, &table_list, 1, UINT_MAX, 1))
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        continue;
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    }
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#endif
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    if (files->push_back(thd->strdup(file->name)))
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    {
      my_dirend(dirp);
      DBUG_RETURN(-1);
    }
  }
  DBUG_PRINT("info",("found: %d files", files->elements));
  my_dirend(dirp);
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  VOID(ha_find_files(thd,db,path,wild,dir,files));

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  DBUG_RETURN(0);
}

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bool
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mysqld_show_create(THD *thd, TABLE_LIST *table_list)
{
  TABLE *table;
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  Protocol *protocol= thd->protocol;
  char buff[2048];
  String buffer(buff, sizeof(buff), system_charset_info);
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  DBUG_ENTER("mysqld_show_create");
  DBUG_PRINT("enter",("db: %s  table: %s",table_list->db,
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                      table_list->table_name));
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  /* Only one table for now, but VIEW can involve several tables */
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  if (open_and_lock_tables(thd, table_list))
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  {
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    DBUG_RETURN(TRUE);
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  }
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  /* TODO: add environment variables show when it become possible */
  if (thd->lex->only_view && !table_list->view)
  {
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    my_error(ER_WRONG_OBJECT, MYF(0),
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             table_list->db, table_list->table_name, "VIEW");
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    DBUG_RETURN(TRUE);
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  }
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  table= table_list->table;
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  if ((table_list->view ?
       view_store_create_info(thd, table_list, &buffer) :
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       store_create_info(thd, table_list, &buffer)))
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    DBUG_RETURN(TRUE);
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  List<Item> field_list;
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  if (table_list->view)
  {
    field_list.push_back(new Item_empty_string("View",NAME_LEN));
    field_list.push_back(new Item_empty_string("Create View",
                                               max(buffer.length(),1024)));
  }
  else
  {
    field_list.push_back(new Item_empty_string("Table",NAME_LEN));
    // 1024 is for not to confuse old clients
    field_list.push_back(new Item_empty_string("Create Table",
                                               max(buffer.length(),1024)));
  }
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  if (protocol->send_fields(&field_list,
                            Protocol::SEND_NUM_ROWS | Protocol::SEND_EOF))
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    DBUG_RETURN(TRUE);
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  protocol->prepare_for_resend();
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  buffer.length(0);
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  if (table_list->view)
  {
    protocol->store(table_list->view_name.str, system_charset_info);
    if (view_store_create_info(thd, table_list, &buffer))
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      DBUG_RETURN(TRUE);
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  }
  else
  {
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    if (table_list->schema_table)
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      protocol->store(table_list->schema_table->table_name,
                      system_charset_info);
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    else
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      protocol->store(table->alias, system_charset_info);
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    if (store_create_info(thd, table_list, &buffer))
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      DBUG_RETURN(TRUE);
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  }
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  protocol->store(buffer.ptr(), buffer.length(), buffer.charset());
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  if (protocol->write())
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    DBUG_RETURN(TRUE);
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  send_eof(thd);
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  DBUG_RETURN(FALSE);
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}

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bool mysqld_show_create_db(THD *thd, char *dbname,
                           HA_CREATE_INFO *create_info)
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{
  int length;
  char	path[FN_REFLEN];
  char buff[2048];
  String buffer(buff, sizeof(buff), system_charset_info);
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#ifndef NO_EMBEDDED_ACCESS_CHECKS
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  uint db_access;
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#endif
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  bool found_libchar;
  HA_CREATE_INFO create;
  uint create_options = create_info ? create_info->options : 0;
  Protocol *protocol=thd->protocol;
  DBUG_ENTER("mysql_show_create_db");

  if (check_db_name(dbname))
  {
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    my_error(ER_WRONG_DB_NAME, MYF(0), dbname);
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    DBUG_RETURN(TRUE);
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  }

#ifndef NO_EMBEDDED_ACCESS_CHECKS
  if (test_all_bits(thd->master_access,DB_ACLS))
    db_access=DB_ACLS;
  else
    db_access= (acl_get(thd->host,thd->ip, thd->priv_user,dbname,0) |
		thd->master_access);
  if (!(db_access & DB_ACLS) && (!grant_option || check_grant_db(thd,dbname)))
  {
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    my_error(ER_DBACCESS_DENIED_ERROR, MYF(0),
             thd->priv_user, thd->host_or_ip, dbname);
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    mysql_log.write(thd,COM_INIT_DB,ER(ER_DBACCESS_DENIED_ERROR),
		    thd->priv_user, thd->host_or_ip, dbname);
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    DBUG_RETURN(TRUE);
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  }
#endif

  (void) sprintf(path,"%s/%s",mysql_data_home, dbname);
  length=unpack_dirname(path,path);		// Convert if not unix
  found_libchar= 0;
  if (length && path[length-1] == FN_LIBCHAR)
  {
    found_libchar= 1;
    path[length-1]=0;				// remove ending '\'
  }
  if (access(path,F_OK))
  {
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    my_error(ER_BAD_DB_ERROR, MYF(0), dbname);
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    DBUG_RETURN(TRUE);
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  }
  if (found_libchar)
    path[length-1]= FN_LIBCHAR;
  strmov(path+length, MY_DB_OPT_FILE);
  load_db_opt(thd, path, &create);

  List<Item> field_list;
  field_list.push_back(new Item_empty_string("Database",NAME_LEN));
  field_list.push_back(new Item_empty_string("Create Database",1024));

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  if (protocol->send_fields(&field_list,
                            Protocol::SEND_NUM_ROWS | Protocol::SEND_EOF))
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    DBUG_RETURN(TRUE);
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  protocol->prepare_for_resend();
  protocol->store(dbname, strlen(dbname), system_charset_info);
  buffer.length(0);
  buffer.append("CREATE DATABASE ", 16);
  if (create_options & HA_LEX_CREATE_IF_NOT_EXISTS)
    buffer.append("/*!32312 IF NOT EXISTS*/ ", 25);
  append_identifier(thd, &buffer, dbname, strlen(dbname));

  if (create.default_table_charset)
  {
    buffer.append(" /*!40100", 9);
    buffer.append(" DEFAULT CHARACTER SET ", 23);
    buffer.append(create.default_table_charset->csname);
    if (!(create.default_table_charset->state & MY_CS_PRIMARY))
    {
      buffer.append(" COLLATE ", 9);
      buffer.append(create.default_table_charset->name);
    }
    buffer.append(" */", 3);
  }
  protocol->store(buffer.ptr(), buffer.length(), buffer.charset());

  if (protocol->write())
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    DBUG_RETURN(TRUE);
502
  send_eof(thd);
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  DBUG_RETURN(FALSE);
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}
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bool
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mysqld_show_logs(THD *thd)
{
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  List<Item> field_list;
  Protocol *protocol= thd->protocol;
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  DBUG_ENTER("mysqld_show_logs");

  field_list.push_back(new Item_empty_string("File",FN_REFLEN));
  field_list.push_back(new Item_empty_string("Type",10));
  field_list.push_back(new Item_empty_string("Status",10));

517 518
  if (protocol->send_fields(&field_list,
                            Protocol::SEND_NUM_ROWS | Protocol::SEND_EOF))
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    DBUG_RETURN(TRUE);
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521
#ifdef HAVE_BERKELEY_DB
522
  if ((have_berkeley_db == SHOW_OPTION_YES) && berkeley_show_logs(protocol))
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    DBUG_RETURN(TRUE);
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#endif
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  send_eof(thd);
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  DBUG_RETURN(FALSE);
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}


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/****************************************************************************
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  Return only fields for API mysql_list_fields
  Use "show table wildcard" in mysql instead of this
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****************************************************************************/

void
mysqld_list_fields(THD *thd, TABLE_LIST *table_list, const char *wild)
{
  TABLE *table;
  DBUG_ENTER("mysqld_list_fields");
541
  DBUG_PRINT("enter",("table: %s",table_list->table_name));
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  table_list->lock_type= TL_UNLOCK;
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  if (open_and_lock_tables(thd, table_list))
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    DBUG_VOID_RETURN;
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  table= table_list->table;

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  List<Item> field_list;

  Field **ptr,*field;
  for (ptr=table->field ; (field= *ptr); ptr++)
  {
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    if (!wild || !wild[0] || 
        !wild_case_compare(system_charset_info, field->field_name,wild))
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      field_list.push_back(new Item_field(field));
  }
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  restore_record(table, s->default_values);              // Get empty record
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  if (thd->protocol->send_fields(&field_list, Protocol::SEND_DEFAULTS |
                                              Protocol::SEND_EOF))
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    DBUG_VOID_RETURN;
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  thd->protocol->flush();
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  DBUG_VOID_RETURN;
}

565

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int
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mysqld_dump_create_info(THD *thd, TABLE_LIST *table_list, int fd)
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{
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  Protocol *protocol= thd->protocol;
  String *packet= protocol->storage_packet();
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  DBUG_ENTER("mysqld_dump_create_info");
572
  DBUG_PRINT("enter",("table: %s",table_list->table->s->table_name));
573

574
  protocol->prepare_for_resend();
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  if (store_create_info(thd, table_list, packet))
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    DBUG_RETURN(-1);
577

578
  if (fd < 0)
579
  {
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    if (protocol->write())
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      DBUG_RETURN(-1);
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    protocol->flush();
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  }
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  else
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  {
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    if (my_write(fd, (const byte*) packet->ptr(), packet->length(),
		 MYF(MY_WME)))
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      DBUG_RETURN(-1);
  }
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  DBUG_RETURN(0);
}
592

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/*
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  Go through all character combinations and ensure that sql_lex.cc can
595
  parse it as an identifier.
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  SYNOPSIS
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  require_quotes()
  name			attribute name
  name_length		length of name

  RETURN
    #	Pointer to conflicting character
    0	No conflicting character
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*/

607
static const char *require_quotes(const char *name, uint name_length)
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{
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  uint length;
  const char *end= name + name_length;

  for ( ; name < end ; name++)
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  {
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    uchar chr= (uchar) *name;
    length= my_mbcharlen(system_charset_info, chr);
    if (length == 1 && !system_charset_info->ident_map[chr])
      return name;
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  }
  return 0;
}
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void
append_identifier(THD *thd, String *packet, const char *name, uint length)
625
{
626 627
  const char *name_end;
  char quote_char;
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  int q= get_quote_char_for_identifier(thd, name, length);
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630
  if (q == EOF)
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  {
632
    packet->append(name, length, system_charset_info);
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    return;
  }

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  /*
    The identifier must be quoted as it includes a quote character or
   it's a keyword
  */
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  packet->reserve(length*2 + 2);
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  quote_char= (char) q;
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  packet->append(&quote_char, 1, system_charset_info);

  for (name_end= name+length ; name < name_end ; name+= length)
  {
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    uchar chr= (uchar) *name;
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    length= my_mbcharlen(system_charset_info, chr);
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    /*
      my_mbcharlen can retur 0 on a wrong multibyte
      sequence. It is possible when upgrading from 4.0,
      and identifier contains some accented characters.
      The manual says it does not work. So we'll just
      change length to 1 not to hang in the endless loop.
    */
    if (!length)
      length= 1;
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    if (length == 1 && chr == (uchar) quote_char)
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      packet->append(&quote_char, 1, system_charset_info);
    packet->append(name, length, packet->charset());
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  }
662
  packet->append(&quote_char, 1, system_charset_info);
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}

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/*
  Get the quote character for displaying an identifier.

  SYNOPSIS
    get_quote_char_for_identifier()
    thd		Thread handler
    name	name to quote
    length	length of name

  IMPLEMENTATION
    If name is a keyword or includes a special character, then force
    quoting.
    Otherwise identifier is quoted only if the option OPTION_QUOTE_SHOW_CREATE
    is set.

  RETURN
    EOF	  No quote character is needed
    #	  Quote character
*/
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int get_quote_char_for_identifier(THD *thd, const char *name, uint length)
{
  if (!is_keyword(name,length) &&
      !require_quotes(name, length) &&
      !(thd->options & OPTION_QUOTE_SHOW_CREATE))
    return EOF;
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  if (thd->variables.sql_mode & MODE_ANSI_QUOTES)
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    return '"';
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  return '`';
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}


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/* Append directory name (if exists) to CREATE INFO */

static void append_directory(THD *thd, String *packet, const char *dir_type,
			     const char *filename)
{
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  if (filename && !(thd->variables.sql_mode & MODE_NO_DIR_IN_CREATE))
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  {
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    uint length= dirname_length(filename);
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    packet->append(' ');
    packet->append(dir_type);
    packet->append(" DIRECTORY='", 12);
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#ifdef __WIN__
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    /* Convert \ to / to be able to create table on unix */
    char *winfilename= (char*) thd->memdup(filename, length);
    char *pos, *end;
    for (pos= winfilename, end= pos+length ; pos < end ; pos++)
    {
      if (*pos == '\\')
        *pos = '/';
    }
    filename= winfilename;
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#endif
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    packet->append(filename, length);
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    packet->append('\'');
  }
}


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#define LIST_PROCESS_HOST_LEN 64
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static int
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store_create_info(THD *thd, TABLE_LIST *table_list, String *packet)
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{
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  List<Item> field_list;
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  char tmp[MAX_FIELD_WIDTH], *for_str, buff[128], *end;
  const char *alias;
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  String type(tmp, sizeof(tmp), system_charset_info);
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  Field **ptr,*field;
  uint primary_key;
  KEY *key_info;
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  TABLE *table= table_list->table;
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  handler *file= table->file;
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  TABLE_SHARE *share= table->s;
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  HA_CREATE_INFO create_info;
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  my_bool foreign_db_mode=    (thd->variables.sql_mode & (MODE_POSTGRESQL |
							  MODE_ORACLE |
							  MODE_MSSQL |
							  MODE_DB2 |
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							  MODE_MAXDB |
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							  MODE_ANSI)) != 0;
  my_bool limited_mysql_mode= (thd->variables.sql_mode &
			       (MODE_NO_FIELD_OPTIONS | MODE_MYSQL323 |
				MODE_MYSQL40)) != 0;
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  DBUG_ENTER("store_create_info");
752
  DBUG_PRINT("enter",("table: %s", table->s->table_name));
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  restore_record(table, s->default_values); // Get empty record
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  if (share->tmp_table)
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    packet->append("CREATE TEMPORARY TABLE ", 23);
  else
    packet->append("CREATE TABLE ", 13);
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  if (table_list->schema_table)
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    alias= table_list->schema_table->table_name;
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  else
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    alias= (lower_case_table_names == 2 ? table->alias :
            share->table_name);
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  append_identifier(thd, packet, alias, strlen(alias));
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  packet->append(" (\n", 3);
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  for (ptr=table->field ; (field= *ptr); ptr++)
  {
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    bool has_default;
771
    bool has_now_default;
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    uint flags = field->flags;

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    if (ptr != table->field)
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      packet->append(",\n", 2);
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777
    packet->append("  ", 2);
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    append_identifier(thd,packet,field->field_name, strlen(field->field_name));
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    packet->append(' ');
    // check for surprises from the previous call to Field::sql_type()
781
    if (type.ptr() != tmp)
782
      type.set(tmp, sizeof(tmp), system_charset_info);
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    else
      type.set_charset(system_charset_info);
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    field->sql_type(type);
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    packet->append(type.ptr(), type.length(), system_charset_info);
788

789
    if (field->has_charset() && !limited_mysql_mode && !foreign_db_mode)
790
    {
791
      if (field->charset() != share->table_charset)
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      {
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	packet->append(" character set ", 15);
	packet->append(field->charset()->csname);
      }
      /* 
	For string types dump collation name only if 
	collation is not primary for the given charset
      */
      if (!(field->charset()->state & MY_CS_PRIMARY))
      {
	packet->append(" collate ", 9);
	packet->append(field->charset()->name);
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      }
805
    }
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    if (flags & NOT_NULL_FLAG)
      packet->append(" NOT NULL", 9);
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    else if (field->type() == FIELD_TYPE_TIMESTAMP)
    {
      /*
        TIMESTAMP field require explicit NULL flag, because unlike
        all other fields they are treated as NOT NULL by default.
      */
      packet->append(" NULL", 5);
    }
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    /* 
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      Again we are using CURRENT_TIMESTAMP instead of NOW because it is
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      more standard 
    */
    has_now_default= table->timestamp_field == field && 
                     field->unireg_check != Field::TIMESTAMP_UN_FIELD;
    
825
    has_default= (field->type() != FIELD_TYPE_BLOB &&
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                  !(field->flags & NO_DEFAULT_VALUE_FLAG) &&
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		  field->unireg_check != Field::NEXT_NUMBER &&
                  !((foreign_db_mode || limited_mysql_mode) &&
                    has_now_default));
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    if (has_default)
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    {
      packet->append(" default ", 9);
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      if (has_now_default)
        packet->append("CURRENT_TIMESTAMP",17);
      else if (!field->is_null())
837
      {                                             // Not null by default
838
        type.set(tmp, sizeof(tmp), field->charset());
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        field->val_str(&type);
840
	if (type.length())
841
	{
842
	  String def_val;
843
          uint dummy_errors;
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	  /* convert to system_charset_info == utf8 */
	  def_val.copy(type.ptr(), type.length(), field->charset(),
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		       system_charset_info, &dummy_errors);
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          append_unescaped(packet, def_val.ptr(), def_val.length());
	}
849 850
        else
	  packet->append("''",2);
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      }
852
      else if (field->maybe_null())
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        packet->append("NULL", 4);                    // Null as default
      else
855
        packet->append(tmp);
856
    }
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    if (!foreign_db_mode && !limited_mysql_mode &&
        table->timestamp_field == field && 
        field->unireg_check != Field::TIMESTAMP_DN_FIELD)
      packet->append(" on update CURRENT_TIMESTAMP",28);

863
    if (field->unireg_check == Field::NEXT_NUMBER && !foreign_db_mode)
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      packet->append(" auto_increment", 15 );

    if (field->comment.length)
    {
      packet->append(" COMMENT ",9);
      append_unescaped(packet, field->comment.str, field->comment.length);
    }
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  }

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  key_info= table->key_info;
  file->info(HA_STATUS_VARIABLE | HA_STATUS_NO_LOCK | HA_STATUS_TIME);
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  bzero((char*) &create_info, sizeof(create_info));
876
  file->update_create_info(&create_info);
877
  primary_key= share->primary_key;
878

879
  for (uint i=0 ; i < share->keys ; i++,key_info++)
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  {
881 882
    KEY_PART_INFO *key_part= key_info->key_part;
    bool found_primary=0;
883
    packet->append(",\n  ", 4);
884

885
    if (i == primary_key && !strcmp(key_info->name, primary_key_name))
886 887
    {
      found_primary=1;
888
      packet->append("PRIMARY ", 8);
889
    }
890
    else if (key_info->flags & HA_NOSAME)
891
      packet->append("UNIQUE ", 7);
892
    else if (key_info->flags & HA_FULLTEXT)
893
      packet->append("FULLTEXT ", 9);
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    else if (key_info->flags & HA_SPATIAL)
      packet->append("SPATIAL ", 8);
896
    packet->append("KEY ", 4);
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898
    if (!found_primary)
899
     append_identifier(thd, packet, key_info->name, strlen(key_info->name));
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901 902 903
    if (!(thd->variables.sql_mode & MODE_NO_KEY_OPTIONS) &&
	!limited_mysql_mode && !foreign_db_mode)
    {
904
      if (key_info->algorithm == HA_KEY_ALG_BTREE)
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        packet->append(" USING BTREE", 12);

907
      if (key_info->algorithm == HA_KEY_ALG_HASH)
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        packet->append(" USING HASH", 11);

910 911 912
      // +BAR: send USING only in non-default case: non-spatial rtree
      if ((key_info->algorithm == HA_KEY_ALG_RTREE) &&
	  !(key_info->flags & HA_SPATIAL))
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        packet->append(" USING RTREE", 12);
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      // No need to send USING FULLTEXT, it is sent as FULLTEXT KEY
916
    }
917
    packet->append(" (", 2);
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    for (uint j=0 ; j < key_info->key_parts ; j++,key_part++)
    {
921
      if (j)
922
        packet->append(',');
923

924
      if (key_part->field)
925 926
        append_identifier(thd,packet,key_part->field->field_name,
			  strlen(key_part->field->field_name));
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      if (!key_part->field ||
928 929 930
          (key_part->length !=
           table->field[key_part->fieldnr-1]->key_length() &&
           !(key_info->flags & HA_FULLTEXT)))
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      {
932
        buff[0] = '(';
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        char* end=int10_to_str((long) key_part->length / 
			       key_part->field->charset()->mbmaxlen,
			       buff + 1,10);
936 937
        *end++ = ')';
        packet->append(buff,(uint) (end-buff));
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      }
    }
    packet->append(')');
  }
942

943 944 945 946
  /*
    Get possible foreign key definitions stored in InnoDB and append them
    to the CREATE TABLE statement
  */
947

948
  if ((for_str= file->get_foreign_key_create_info()))
949 950 951
  {
    packet->append(for_str, strlen(for_str));
    file->free_foreign_key_create_info(for_str);
952 953 954
  }

  packet->append("\n)", 2);
955
  if (!(thd->variables.sql_mode & MODE_NO_TABLE_OPTIONS) && !foreign_db_mode)
956
  {
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    if (thd->variables.sql_mode & (MODE_MYSQL323 | MODE_MYSQL40))
      packet->append(" TYPE=", 6);
    else
      packet->append(" ENGINE=", 8);
961 962
    packet->append(file->table_type());
    
963
    if (share->table_charset &&
964 965
	!(thd->variables.sql_mode & MODE_MYSQL323) &&
	!(thd->variables.sql_mode & MODE_MYSQL40))
966
    {
967
      packet->append(" DEFAULT CHARSET=", 17);
968 969
      packet->append(share->table_charset->csname);
      if (!(share->table_charset->state & MY_CS_PRIMARY))
970
      {
971
	packet->append(" COLLATE=", 9);
972
	packet->append(table->s->table_charset->name);
973
      }
974
    }
975

976
    if (share->min_rows)
977
    {
978
      packet->append(" MIN_ROWS=", 10);
979
      end= longlong10_to_str(share->min_rows, buff, 10);
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      packet->append(buff, (uint) (end- buff));
981
    }
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983
    if (share->max_rows && !table_list->schema_table)
984
    {
985
      packet->append(" MAX_ROWS=", 10);
986
      end= longlong10_to_str(share->max_rows, buff, 10);
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      packet->append(buff, (uint) (end - buff));
988
    }
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990
    if (share->avg_row_length)
991
    {
992
      packet->append(" AVG_ROW_LENGTH=", 16);
993
      end= longlong10_to_str(share->avg_row_length, buff,10);
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      packet->append(buff, (uint) (end - buff));
995
    }
996

997
    if (share->db_create_options & HA_OPTION_PACK_KEYS)
998
      packet->append(" PACK_KEYS=1", 12);
999
    if (share->db_create_options & HA_OPTION_NO_PACK_KEYS)
1000
      packet->append(" PACK_KEYS=0", 12);
1001
    if (share->db_create_options & HA_OPTION_CHECKSUM)
1002
      packet->append(" CHECKSUM=1", 11);
1003
    if (share->db_create_options & HA_OPTION_DELAY_KEY_WRITE)
1004
      packet->append(" DELAY_KEY_WRITE=1",18);
1005
    if (share->row_type != ROW_TYPE_DEFAULT)
1006 1007
    {
      packet->append(" ROW_FORMAT=",12);
1008
      packet->append(ha_row_type[(uint) share->row_type]);
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    }
    table->file->append_create_info(packet);
1011
    if (share->comment && share->comment[0])
1012 1013
    {
      packet->append(" COMMENT=", 9);
1014
      append_unescaped(packet, share->comment, strlen(share->comment));
1015 1016 1017
    }
    if (file->raid_type)
    {
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      uint length;
      length= my_snprintf(buff,sizeof(buff),
			  " RAID_TYPE=%s RAID_CHUNKS=%d RAID_CHUNKSIZE=%ld",
			  my_raid_type(file->raid_type), file->raid_chunks,
			  file->raid_chunksize/RAID_BLOCK_SIZE);
      packet->append(buff, length);
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    }
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    append_directory(thd, packet, "DATA",  create_info.data_file_name);
    append_directory(thd, packet, "INDEX", create_info.index_file_name);
1027
  }
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  DBUG_RETURN(0);
}


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static int
view_store_create_info(THD *thd, TABLE_LIST *table, String *buff)
{
  my_bool foreign_db_mode= (thd->variables.sql_mode & (MODE_POSTGRESQL |
                                                       MODE_ORACLE |
                                                       MODE_MSSQL |
                                                       MODE_DB2 |
                                                       MODE_MAXDB |
                                                       MODE_ANSI)) != 0;
  buff->append("CREATE ", 7);
1042
  if (!foreign_db_mode)
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  {
    buff->append("ALGORITHM=", 10);
1045
    switch((int8)table->algorithm)
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    {
    case VIEW_ALGORITHM_UNDEFINED:
      buff->append("UNDEFINED ", 10);
      break;
    case VIEW_ALGORITHM_TMPTABLE:
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      buff->append("TEMPTABLE ", 10);
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      break;
    case VIEW_ALGORITHM_MERGE:
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      buff->append("MERGE ", 6);
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      break;
    default:
	DBUG_ASSERT(0); // never should happen
    }
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  }
  buff->append("VIEW ", 5);
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  append_identifier(thd, buff, table->view_db.str, table->view_db.length);
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  buff->append('.');
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  append_identifier(thd, buff, table->view_name.str, table->view_name.length);
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  buff->append(" AS ", 4);
  buff->append(table->query.str, table->query.length);
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  if (table->with_check != VIEW_CHECK_NONE)
  {
    if (table->with_check == VIEW_CHECK_LOCAL)
      buff->append(" WITH LOCAL CHECK OPTION", 24);
    else
      buff->append(" WITH CASCADED CHECK OPTION", 27);
  }
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  return 0;
}


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/****************************************************************************
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  Return info about all processes
  returns for each thread: thread id, user, host, db, command, info
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****************************************************************************/

class thread_info :public ilink {
public:
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  static void *operator new(size_t size)
  {
    return (void*) sql_alloc((uint) size);
  }
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  static void operator delete(void *ptr __attribute__((unused)),
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                              size_t size __attribute__((unused)))
  { TRASH(ptr, size); }
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  ulong thread_id;
  time_t start_time;
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  uint   command;
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  const char *user,*host,*db,*proc_info,*state_info;
  char *query;
};

#ifdef __GNUC__
template class I_List<thread_info>;
#endif

void mysqld_list_processes(THD *thd,const char *user, bool verbose)
{
  Item *field;
  List<Item> field_list;
  I_List<thread_info> thread_infos;
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  ulong max_query_length= (verbose ? thd->variables.max_allowed_packet :
			   PROCESS_LIST_WIDTH);
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  Protocol *protocol= thd->protocol;
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  DBUG_ENTER("mysqld_list_processes");

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  field_list.push_back(new Item_int("Id",0,11));
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  field_list.push_back(new Item_empty_string("User",16));
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  field_list.push_back(new Item_empty_string("Host",LIST_PROCESS_HOST_LEN));
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  field_list.push_back(field=new Item_empty_string("db",NAME_LEN));
  field->maybe_null=1;
  field_list.push_back(new Item_empty_string("Command",16));
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  field_list.push_back(new Item_return_int("Time",7, FIELD_TYPE_LONG));
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  field_list.push_back(field=new Item_empty_string("State",30));
  field->maybe_null=1;
  field_list.push_back(field=new Item_empty_string("Info",max_query_length));
  field->maybe_null=1;
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  if (protocol->send_fields(&field_list,
                            Protocol::SEND_NUM_ROWS | Protocol::SEND_EOF))
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    DBUG_VOID_RETURN;

  VOID(pthread_mutex_lock(&LOCK_thread_count)); // For unlink from list
  if (!thd->killed)
  {
    I_List_iterator<THD> it(threads);
    THD *tmp;
    while ((tmp=it++))
    {
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      struct st_my_thread_var *mysys_var;
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      if ((tmp->vio_ok() || tmp->system_thread) &&
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          (!user || (tmp->user && !strcmp(tmp->user,user))))
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      {
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        thread_info *thd_info=new thread_info;

        thd_info->thread_id=tmp->thread_id;
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        thd_info->user=thd->strdup(tmp->user ? tmp->user :
				   (tmp->system_thread ?
				    "system user" : "unauthenticated user"));
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	if (tmp->peer_port && (tmp->host || tmp->ip) && thd->host_or_ip[0])
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	{
	  if ((thd_info->host= thd->alloc(LIST_PROCESS_HOST_LEN+1)))
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	    my_snprintf((char *) thd_info->host, LIST_PROCESS_HOST_LEN,
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			"%s:%u", tmp->host_or_ip, tmp->peer_port);
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	}
	else
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	  thd_info->host= thd->strdup(tmp->host_or_ip);
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        if ((thd_info->db=tmp->db))             // Safe test
          thd_info->db=thd->strdup(thd_info->db);
        thd_info->command=(int) tmp->command;
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        if ((mysys_var= tmp->mysys_var))
          pthread_mutex_lock(&mysys_var->mutex);
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        thd_info->proc_info= (char*) (tmp->killed == THD::KILL_CONNECTION? "Killed" : 0);
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#ifndef EMBEDDED_LIBRARY
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        thd_info->state_info= (char*) (tmp->locked ? "Locked" :
                                       tmp->net.reading_or_writing ?
                                       (tmp->net.reading_or_writing == 2 ?
                                        "Writing to net" :
                                        thd_info->command == COM_SLEEP ? "" :
                                        "Reading from net") :
                                       tmp->proc_info ? tmp->proc_info :
                                       tmp->mysys_var &&
                                       tmp->mysys_var->current_cond ?
                                       "Waiting on cond" : NullS);
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#else
        thd_info->state_info= (char*)"Writing to net";
#endif
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        if (mysys_var)
          pthread_mutex_unlock(&mysys_var->mutex);
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#if !defined(DONT_USE_THR_ALARM) && ! defined(SCO)
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        if (pthread_kill(tmp->real_id,0))
          tmp->proc_info="*** DEAD ***";        // This shouldn't happen
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#endif
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#ifdef EXTRA_DEBUG
        thd_info->start_time= tmp->time_after_lock;
#else
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        thd_info->start_time= tmp->start_time;
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#endif
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        thd_info->query=0;
        if (tmp->query)
        {
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	  /* 
            query_length is always set to 0 when we set query = NULL; see
	    the comment in sql_class.h why this prevents crashes in possible
            races with query_length
          */
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          uint length= min(max_query_length, tmp->query_length);
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          thd_info->query=(char*) thd->strmake(tmp->query,length);
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        }
        thread_infos.append(thd_info);
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      }
    }
  }
  VOID(pthread_mutex_unlock(&LOCK_thread_count));

  thread_info *thd_info;
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  time_t now= time(0);
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  while ((thd_info=thread_infos.get()))
  {
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    protocol->prepare_for_resend();
    protocol->store((ulonglong) thd_info->thread_id);
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    protocol->store(thd_info->user, system_charset_info);
    protocol->store(thd_info->host, system_charset_info);
    protocol->store(thd_info->db, system_charset_info);
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    if (thd_info->proc_info)
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      protocol->store(thd_info->proc_info, system_charset_info);
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    else
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      protocol->store(command_name[thd_info->command], system_charset_info);
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    if (thd_info->start_time)
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      protocol->store((uint32) (now - thd_info->start_time));
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    else
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      protocol->store_null();
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    protocol->store(thd_info->state_info, system_charset_info);
    protocol->store(thd_info->query, system_charset_info);
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    if (protocol->write())
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      break; /* purecov: inspected */
  }
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  send_eof(thd);
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  DBUG_VOID_RETURN;
}

/*****************************************************************************
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  Status functions
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*****************************************************************************/

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static bool show_status_array(THD *thd, const char *wild,
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                              show_var_st *variables,
                              enum enum_var_type value_type,
                              struct system_status_var *status_var,
                              const char *prefix, TABLE *table)
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{
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  char buff[1024], *prefix_end;
  /* the variable name should not be longer then 80 characters */
  char name_buffer[80];
  int len;
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  LEX_STRING null_lex_str;
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  DBUG_ENTER("show_status_array");
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  null_lex_str.str= 0;				// For sys_var->value_ptr()
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  null_lex_str.length= 0;
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  prefix_end=strnmov(name_buffer, prefix, sizeof(name_buffer)-1);
  len=name_buffer + sizeof(name_buffer) - prefix_end;

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  for (; variables->name; variables++)
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  {
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    strnmov(prefix_end, variables->name, len);
    name_buffer[sizeof(name_buffer)-1]=0;       /* Safety */
    SHOW_TYPE show_type=variables->type;
    if (show_type == SHOW_VARS)
    {
      show_status_array(thd, wild, (show_var_st *) variables->value,
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                        value_type, status_var, variables->name, table);
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    }
    else
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    {
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      if (!(wild && wild[0] && wild_case_compare(system_charset_info,
                                                 name_buffer, wild)))
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      {
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        char *value=variables->value;
        const char *pos, *end;
        long nr;
        if (show_type == SHOW_SYS)
        {
          show_type= ((sys_var*) value)->type();
          value=     (char*) ((sys_var*) value)->value_ptr(thd, value_type,
                                                           &null_lex_str);
        }

        pos= end= buff;
        switch (show_type) {
        case SHOW_LONG_STATUS:
        case SHOW_LONG_CONST_STATUS:
          value= ((char *) status_var + (ulong) value);
          /* fall through */
        case SHOW_LONG:
        case SHOW_LONG_CONST:
          end= int10_to_str(*(long*) value, buff, 10);
          break;
        case SHOW_LONGLONG:
          end= longlong10_to_str(*(longlong*) value, buff, 10);
          break;
        case SHOW_HA_ROWS:
          end= longlong10_to_str((longlong) *(ha_rows*) value, buff, 10);
          break;
        case SHOW_BOOL:
          end= strmov(buff, *(bool*) value ? "ON" : "OFF");
          break;
        case SHOW_MY_BOOL:
          end= strmov(buff, *(my_bool*) value ? "ON" : "OFF");
          break;
        case SHOW_INT_CONST:
        case SHOW_INT:
          end= int10_to_str((long) *(uint32*) value, buff, 10);
          break;
        case SHOW_HAVE:
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        {
          SHOW_COMP_OPTION tmp= *(SHOW_COMP_OPTION*) value;
          pos= show_comp_option_name[(int) tmp];
          end= strend(pos);
          break;
        }
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        case SHOW_CHAR:
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        {
          if (!(pos= value))
            pos= "";
          end= strend(pos);
          break;
        }
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        case SHOW_STARTTIME:
          nr= (long) (thd->query_start() - start_time);
          end= int10_to_str(nr, buff, 10);
          break;
        case SHOW_QUESTION:
          end= int10_to_str((long) thd->query_id, buff, 10);
          break;
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#ifdef HAVE_REPLICATION
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        case SHOW_RPL_STATUS:
          end= strmov(buff, rpl_status_type[(int)rpl_status]);
          break;
        case SHOW_SLAVE_RUNNING:
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        {
          pthread_mutex_lock(&LOCK_active_mi);
          end= strmov(buff, (active_mi->slave_running &&
                             active_mi->rli.slave_running) ? "ON" : "OFF");
          pthread_mutex_unlock(&LOCK_active_mi);
          break;
        }
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        case SHOW_SLAVE_RETRIED_TRANS:
        {
          /*
            TODO: in 5.1 with multimaster, have one such counter per line in SHOW
            SLAVE STATUS, and have the sum over all lines here.
          */
	  pthread_mutex_lock(&LOCK_active_mi);
          pthread_mutex_lock(&active_mi->rli.data_lock);
	  end= int10_to_str(active_mi->rli.retried_trans, buff, 10);
          pthread_mutex_unlock(&active_mi->rli.data_lock);
	  pthread_mutex_unlock(&LOCK_active_mi);
	  break;
        }
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        case SHOW_SLAVE_SKIP_ERRORS:
        {
          MY_BITMAP *bitmap= (MY_BITMAP *)value;
          if (!use_slave_mask || bitmap_is_clear_all(bitmap))
          {
            end= strmov(buff, "OFF");
          }
          else if (bitmap_is_set_all(bitmap))
          {
            end= strmov(buff, "ALL");
          }
          else
          {
            for (int i= 1; i < MAX_SLAVE_ERROR; i++)
            {
              if (bitmap_is_set(bitmap, i))
              {
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                end= int10_to_str(i, (char*) end, 10);
                *(char*) end++= ',';
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              }
            }
            if (end != buff)
              end--;				// Remove last ','
          }
          break;
        }
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#endif /* HAVE_REPLICATION */
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        case SHOW_OPENTABLES:
          end= int10_to_str((long) cached_tables(), buff, 10);
          break;
        case SHOW_CHAR_PTR:
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        {
          if (!(pos= *(char**) value))
            pos= "";
          end= strend(pos);
          break;
        }
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        case SHOW_DOUBLE_STATUS:
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        {
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          value= ((char *) status_var + (ulong) value);
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          end= buff + sprintf(buff, "%f", *(double*) value);
          break;
        }
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#ifdef HAVE_OPENSSL
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          /* First group - functions relying on CTX */
        case SHOW_SSL_CTX_SESS_ACCEPT:
          end= int10_to_str((long) (!ssl_acceptor_fd ? 0 :
                                    SSL_CTX_sess_accept(ssl_acceptor_fd->
                                                        ssl_context)),
                            buff, 10);
          break;
        case SHOW_SSL_CTX_SESS_ACCEPT_GOOD:
          end= int10_to_str((long) (!ssl_acceptor_fd ? 0 :
                                    SSL_CTX_sess_accept_good(ssl_acceptor_fd->
                                                             ssl_context)),
                            buff, 10);
          break;
        case SHOW_SSL_CTX_SESS_CONNECT_GOOD:
          end= int10_to_str((long) (!ssl_acceptor_fd ? 0 :
                                    SSL_CTX_sess_connect_good(ssl_acceptor_fd->
                                                              ssl_context)),
                            buff, 10);
          break;
        case SHOW_SSL_CTX_SESS_ACCEPT_RENEGOTIATE:
          end= int10_to_str((long) (!ssl_acceptor_fd ? 0 :
                                    SSL_CTX_sess_accept_renegotiate(ssl_acceptor_fd->ssl_context)),
                            buff, 10);
          break;
        case SHOW_SSL_CTX_SESS_CONNECT_RENEGOTIATE:
          end= int10_to_str((long) (!ssl_acceptor_fd ? 0 :
                                    SSL_CTX_sess_connect_renegotiate(ssl_acceptor_fd-> ssl_context)),
                            buff, 10);
          break;
        case SHOW_SSL_CTX_SESS_CB_HITS:
          end= int10_to_str((long) (!ssl_acceptor_fd ? 0 :
                                    SSL_CTX_sess_cb_hits(ssl_acceptor_fd->
                                                         ssl_context)),
                            buff, 10);
          break;
        case SHOW_SSL_CTX_SESS_HITS:
          end= int10_to_str((long) (!ssl_acceptor_fd ? 0 :
                                    SSL_CTX_sess_hits(ssl_acceptor_fd->
                                                      ssl_context)),
                            buff, 10);
          break;
        case SHOW_SSL_CTX_SESS_CACHE_FULL:
          end= int10_to_str((long) (!ssl_acceptor_fd ? 0 :
                                    SSL_CTX_sess_cache_full(ssl_acceptor_fd->
                                                            ssl_context)),
                            buff, 10);
          break;
        case SHOW_SSL_CTX_SESS_MISSES:
          end= int10_to_str((long) (!ssl_acceptor_fd ? 0 :
                                    SSL_CTX_sess_misses(ssl_acceptor_fd->
                                                        ssl_context)),
                            buff, 10);
          break;
        case SHOW_SSL_CTX_SESS_TIMEOUTS:
          end= int10_to_str((long) (!ssl_acceptor_fd ? 0 :
                                    SSL_CTX_sess_timeouts(ssl_acceptor_fd->ssl_context)),
                            buff,10);
          break;
        case SHOW_SSL_CTX_SESS_NUMBER:
          end= int10_to_str((long) (!ssl_acceptor_fd ? 0 :
                                    SSL_CTX_sess_number(ssl_acceptor_fd->ssl_context)),
                            buff,10);
          break;
        case SHOW_SSL_CTX_SESS_CONNECT:
          end= int10_to_str((long) (!ssl_acceptor_fd ? 0 :
                                    SSL_CTX_sess_connect(ssl_acceptor_fd->ssl_context)),
                            buff,10);
          break;
        case SHOW_SSL_CTX_SESS_GET_CACHE_SIZE:
          end= int10_to_str((long) (!ssl_acceptor_fd ? 0 :
                                    SSL_CTX_sess_get_cache_size(ssl_acceptor_fd->ssl_context)),
                            buff,10);
          break;
        case SHOW_SSL_CTX_GET_VERIFY_MODE:
          end= int10_to_str((long) (!ssl_acceptor_fd ? 0 :
                                    SSL_CTX_get_verify_mode(ssl_acceptor_fd->ssl_context)),
                            buff,10);
          break;
        case SHOW_SSL_CTX_GET_VERIFY_DEPTH:
          end= int10_to_str((long) (!ssl_acceptor_fd ? 0 :
                                    SSL_CTX_get_verify_depth(ssl_acceptor_fd->ssl_context)),
                            buff,10);
          break;
        case SHOW_SSL_CTX_GET_SESSION_CACHE_MODE:
          if (!ssl_acceptor_fd)
          {
            pos= "NONE";
            end= pos+4;
            break;
          }
          switch (SSL_CTX_get_session_cache_mode(ssl_acceptor_fd->ssl_context))
          {
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          case SSL_SESS_CACHE_OFF:
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            pos= "OFF";
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            break;
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          case SSL_SESS_CACHE_CLIENT:
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            pos= "CLIENT";
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            break;
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          case SSL_SESS_CACHE_SERVER:
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            pos= "SERVER";
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            break;
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          case SSL_SESS_CACHE_BOTH:
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            pos= "BOTH";
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            break;
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          case SSL_SESS_CACHE_NO_AUTO_CLEAR:
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            pos= "NO_AUTO_CLEAR";
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            break;
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          case SSL_SESS_CACHE_NO_INTERNAL_LOOKUP:
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            pos= "NO_INTERNAL_LOOKUP";
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            break;
          default:
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            pos= "Unknown";
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            break;
          }
          end= strend(pos);
          break;
          /* First group - functions relying on SSL */
        case SHOW_SSL_GET_VERSION:
          pos= (thd->net.vio->ssl_arg ?
                SSL_get_version((SSL*) thd->net.vio->ssl_arg) : "");
          end= strend(pos);
          break;
        case SHOW_SSL_SESSION_REUSED:
          end= int10_to_str((long) (thd->net.vio->ssl_arg ?
                                    SSL_session_reused((SSL*) thd->net.vio->
                                                       ssl_arg) :
                                    0),
                            buff, 10);
          break;
        case SHOW_SSL_GET_DEFAULT_TIMEOUT:
          end= int10_to_str((long) (thd->net.vio->ssl_arg ?
                                    SSL_get_default_timeout((SSL*) thd->net.vio->
                                                            ssl_arg) :
                                    0),
                            buff, 10);
          break;
        case SHOW_SSL_GET_VERIFY_MODE:
          end= int10_to_str((long) (thd->net.vio->ssl_arg ?
                                    SSL_get_verify_mode((SSL*) thd->net.vio->
                                                        ssl_arg):
                                    0),
                            buff, 10);
          break;
        case SHOW_SSL_GET_VERIFY_DEPTH:
          end= int10_to_str((long) (thd->net.vio->ssl_arg ?
                                    SSL_get_verify_depth((SSL*) thd->net.vio->
                                                         ssl_arg):
                                    0),
                            buff, 10);
          break;
        case SHOW_SSL_GET_CIPHER:
          pos= (thd->net.vio->ssl_arg ?
                SSL_get_cipher((SSL*) thd->net.vio->ssl_arg) : "" );
          end= strend(pos);
          break;
        case SHOW_SSL_GET_CIPHER_LIST:
          if (thd->net.vio->ssl_arg)
          {
            char *to= buff;
            for (int i=0 ; i++ ;)
            {
              const char *p= SSL_get_cipher_list((SSL*) thd->net.vio->ssl_arg,i);
              if (p == NULL)
                break;
              to= strmov(to, p);
              *to++= ':';
            }
            if (to != buff)
              to--;				// Remove last ':'
            end= to;
          }
          break;
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#endif /* HAVE_OPENSSL */
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        case SHOW_KEY_CACHE_LONG:
        case SHOW_KEY_CACHE_CONST_LONG:
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          value= (value-(char*) &dflt_key_cache_var)+ (char*) dflt_key_cache;
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          end= int10_to_str(*(long*) value, buff, 10);
          break;
        case SHOW_UNDEF:				// Show never happen
        case SHOW_SYS:
          break;					// Return empty string
        default:
          break;
        }
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        restore_record(table, s->default_values);
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        table->field[0]->store(name_buffer, strlen(name_buffer),
                               system_charset_info);
        table->field[1]->store(pos, (uint32) (end - pos), system_charset_info);
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        if (schema_table_store_record(thd, table))
          DBUG_RETURN(TRUE);
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      }
    }
  }
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  DBUG_RETURN(FALSE);
}


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/* collect status for all running threads */

void calc_sum_of_all_status(STATUS_VAR *to)
{
  DBUG_ENTER("calc_sum_of_all_status");

  /* Ensure that thread id not killed during loop */
  VOID(pthread_mutex_lock(&LOCK_thread_count)); // For unlink from list

  I_List_iterator<THD> it(threads);
  THD *tmp;
  
  /* Get global values as base */
  *to= global_status_var;
  
  /* Add to this status from existing threads */
  while ((tmp= it++))
    add_to_status(to, &tmp->status_var);
  
  VOID(pthread_mutex_unlock(&LOCK_thread_count));
  DBUG_VOID_RETURN;
}


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LEX_STRING *make_lex_string(THD *thd, LEX_STRING *lex_str,
                            const char* str, uint length,
                            bool allocate_lex_string)
{
  MEM_ROOT *mem= thd->mem_root;
  if (allocate_lex_string)
    lex_str= (LEX_STRING *)thd->alloc(sizeof(LEX_STRING));
  lex_str->str= strmake_root(mem, str, length);
  lex_str->length= length;
  return lex_str;
}


/* INFORMATION_SCHEMA name */
LEX_STRING information_schema_name= {(char*)"information_schema", 18};
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/* This is only used internally, but we need it here as a forward reference */
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extern ST_SCHEMA_TABLE schema_tables[];

typedef struct st_index_field_values
{
  const char *db_value, *table_value;
} INDEX_FIELD_VALUES;


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/*
  Store record to I_S table, convert HEAP table
  to MyISAM if necessary

  SYNOPSIS
    schema_table_store_record()
    thd                   thread handler
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    table                 Information schema table to be updated

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  RETURN
    0	                  success
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    1	                  error
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*/

static bool schema_table_store_record(THD *thd, TABLE *table)
{
  int error;
  if ((error= table->file->write_row(table->record[0])))
  {
    if (create_myisam_from_heap(thd, table, 
                                table->pos_in_table_list->schema_table_param,
                                error, 0))
      return 1;
  }
  return 0;
}


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void get_index_field_values(LEX *lex, INDEX_FIELD_VALUES *index_field_values)
{
  const char *wild= lex->wild ? lex->wild->ptr() : NullS;
  switch (lex->orig_sql_command) {
  case SQLCOM_SHOW_DATABASES:
    index_field_values->db_value= wild;
    break;
  case SQLCOM_SHOW_TABLES:
  case SQLCOM_SHOW_TABLE_STATUS:
    index_field_values->db_value= lex->current_select->db;
    index_field_values->table_value= wild;
    break;
  default:
    index_field_values->db_value= NullS;
    index_field_values->table_value= NullS;
    break;
  }
}


int make_table_list(THD *thd, SELECT_LEX *sel,
                    char *db, char *table)
{
  Table_ident *table_ident;
  LEX_STRING ident_db, ident_table;
  ident_db.str= db; 
  ident_db.length= strlen(db);
  ident_table.str= table;
  ident_table.length= strlen(table);
  table_ident= new Table_ident(thd, ident_db, ident_table, 1);
  sel->init_query();
  if(!sel->add_table_to_list(thd, table_ident, 0, 0, TL_READ,
                             (List<String> *) 0, (List<String> *) 0))
    return 1;
  return 0;
}


bool uses_only_table_name_fields(Item *item, TABLE_LIST *table)
{
  if (item->type() == Item::FUNC_ITEM)
  {
    Item_func *item_func= (Item_func*)item;
    Item **child;
    Item **item_end= (item_func->arguments()) + item_func->argument_count();
    for (child= item_func->arguments(); child != item_end; child++)
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    {
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      if (!uses_only_table_name_fields(*child, table))
        return 0;
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    }
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  }
  else if (item->type() == Item::FIELD_ITEM)
  {
    Item_field *item_field= (Item_field*)item;
    CHARSET_INFO *cs= system_charset_info;
    ST_SCHEMA_TABLE *schema_table= table->schema_table;
    ST_FIELD_INFO *field_info= schema_table->fields_info;
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    const char *field_name1= schema_table->idx_field1 >= 0 ? field_info[schema_table->idx_field1].field_name : "";
    const char *field_name2= schema_table->idx_field2 >= 0 ? field_info[schema_table->idx_field2].field_name : "";
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    if (table->table != item_field->field->table ||
        (cs->coll->strnncollsp(cs, (uchar *) field_name1, strlen(field_name1),
                               (uchar *) item_field->field_name, 
                               strlen(item_field->field_name), 0) &&
         cs->coll->strnncollsp(cs, (uchar *) field_name2, strlen(field_name2),
                               (uchar *) item_field->field_name, 
                               strlen(item_field->field_name), 0)))
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      return 0;
  }
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  else if (item->type() == Item::REF_ITEM)
    return uses_only_table_name_fields(item->real_item(), table);
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  if (item->type() == Item::SUBSELECT_ITEM &&
      !item->const_item())
    return 0;

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  return 1;
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}


static COND * make_cond_for_info_schema(COND *cond, TABLE_LIST *table)
{
  if (!cond)
    return (COND*) 0;
  if (cond->type() == Item::COND_ITEM)
  {
    if (((Item_cond*) cond)->functype() == Item_func::COND_AND_FUNC)
    {
      /* Create new top level AND item */
      Item_cond_and *new_cond=new Item_cond_and;
      if (!new_cond)
	return (COND*) 0;
      List_iterator<Item> li(*((Item_cond*) cond)->argument_list());
      Item *item;
      while ((item=li++))
      {
	Item *fix= make_cond_for_info_schema(item, table);
	if (fix)
	  new_cond->argument_list()->push_back(fix);
      }
      switch (new_cond->argument_list()->elements) {
      case 0:
	return (COND*) 0;
      case 1:
	return new_cond->argument_list()->head();
      default:
	new_cond->quick_fix_field();
	return new_cond;
      }
    }
    else
    {						// Or list
      Item_cond_or *new_cond=new Item_cond_or;
      if (!new_cond)
	return (COND*) 0;
      List_iterator<Item> li(*((Item_cond*) cond)->argument_list());
      Item *item;
      while ((item=li++))
      {
	Item *fix=make_cond_for_info_schema(item, table);
	if (!fix)
	  return (COND*) 0;
	new_cond->argument_list()->push_back(fix);
      }
      new_cond->quick_fix_field();
      new_cond->top_level_item();
      return new_cond;
    }
  }

  if (!uses_only_table_name_fields(cond, table))
    return (COND*) 0;
  return cond;
}


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enum enum_schema_tables get_schema_table_idx(ST_SCHEMA_TABLE *schema_table)
{
  return (enum enum_schema_tables) (schema_table - &schema_tables[0]);
}


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/*
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  Create db names list. Information schema name always is first in list
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  SYNOPSIS
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    make_db_list()
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    thd                   thread handler
    files                 list of db names
    wild                  wild string
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    idx_field_vals        idx_field_vals->db_name contains db name or
                          wild string
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    with_i_schema         returns 1 if we added 'IS' name to list
                          otherwise returns 0
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    is_wild_value         if value is 1 then idx_field_vals->db_name is
                          wild string otherwise it's db name; 
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  RETURN
    1	                  error
    0	                  success
*/

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int make_db_list(THD *thd, List<char> *files,
                 INDEX_FIELD_VALUES *idx_field_vals,
                 bool *with_i_schema, bool is_wild_value)
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{
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  LEX *lex= thd->lex;
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  *with_i_schema= 0;
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  get_index_field_values(lex, idx_field_vals);
  if (is_wild_value)
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  {
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    /*
      This part of code is only for SHOW DATABASES command.
      idx_field_vals->db_value can be 0 when we don't use
      LIKE clause (see also get_index_field_values() function)
    */
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    if (!idx_field_vals->db_value ||
        !wild_case_compare(system_charset_info, 
                           information_schema_name.str,
                           idx_field_vals->db_value))
    {
      *with_i_schema= 1;
      if (files->push_back(thd->strdup(information_schema_name.str)))
        return 1;
    }
    return mysql_find_files(thd, files, NullS, mysql_data_home,
                            idx_field_vals->db_value, 1);
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  }
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  /*
    This part of code is for SHOW TABLES, SHOW TABLE STATUS commands.
    idx_field_vals->db_value can't be 0 (see get_index_field_values()
    function). lex->orig_sql_command can be not equal to SQLCOM_END
    only in case of executing of SHOW commands.
  */
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  if (lex->orig_sql_command != SQLCOM_END)
  {
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    if (!my_strcasecmp(system_charset_info, information_schema_name.str,
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                       idx_field_vals->db_value))
    {
      *with_i_schema= 1;
      return files->push_back(thd->strdup(information_schema_name.str));
    }
    return files->push_back(thd->strdup(idx_field_vals->db_value));
  }

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  /*
    Create list of existing databases. It is used in case
    of select from information schema table
  */
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  if (files->push_back(thd->strdup(information_schema_name.str)))
    return 1;
  *with_i_schema= 1;
  return mysql_find_files(thd, files, NullS, mysql_data_home, NullS, 1);
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}


int schema_tables_add(THD *thd, List<char> *files, const char *wild)
{
  ST_SCHEMA_TABLE *tmp_schema_table= schema_tables;
  for ( ; tmp_schema_table->table_name; tmp_schema_table++)
  {
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    if (tmp_schema_table->hidden)
      continue;
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    if (wild)
    {
      if (lower_case_table_names)
      {
        if (wild_case_compare(files_charset_info,
                              tmp_schema_table->table_name,
                              wild))
          continue;
      }
      else if (wild_compare(tmp_schema_table->table_name, wild, 0))
        continue;
    }
    if (files->push_back(thd->strdup(tmp_schema_table->table_name)))
      return 1;
  }
  return 0;
}


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int get_all_tables(THD *thd, TABLE_LIST *tables, COND *cond)
{
  LEX *lex= thd->lex;
  TABLE *table= tables->table;
  SELECT_LEX *select_lex= &lex->select_lex;
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  SELECT_LEX *old_all_select_lex= lex->all_selects_list;
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  SELECT_LEX *lsel= tables->schema_select_lex;
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  ST_SCHEMA_TABLE *schema_table= tables->schema_table;
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  SELECT_LEX sel;
  INDEX_FIELD_VALUES idx_field_vals;
  char path[FN_REFLEN], *end, *base_name, *file_name;
  uint len;
  bool with_i_schema;
  enum enum_schema_tables schema_table_idx;
  thr_lock_type lock_type;
  List<char> bases;
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  List_iterator_fast<char> it(bases);
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  COND *partial_cond; 
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  uint derived_tables= lex->derived_tables; 
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  int error= 1;
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  DBUG_ENTER("get_all_tables");

  LINT_INIT(end);
  LINT_INIT(len);
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  if (lsel)
  {
    TABLE *old_open_tables= thd->open_tables;
    TABLE_LIST *show_table_list= (TABLE_LIST*) lsel->table_list.first;
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    bool res;

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    lex->all_selects_list= lsel;
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    res= open_and_lock_tables(thd, show_table_list);
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    if (schema_table->process_table(thd, show_table_list,
                                    table, res, show_table_list->db,
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                                    show_table_list->alias))
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      goto err;
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    close_thread_tables(thd, 0, 0, old_open_tables);
    show_table_list->table= 0;
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    error= 0;
    goto err;
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  }

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  schema_table_idx= get_schema_table_idx(schema_table);
  lock_type= TL_UNLOCK;

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  if (schema_table_idx == SCH_TABLES)
    lock_type= TL_READ;
1958

1959 1960
  if (make_db_list(thd, &bases, &idx_field_vals,
                   &with_i_schema, 0))
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    goto err;
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  partial_cond= make_cond_for_info_schema(cond, tables);
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  it.rewind(); /* To get access to new elements in basis list */
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  while ((base_name= it++) ||
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	 /*
	   generate error for non existing database.
	   (to save old behaviour for SHOW TABLES FROM db)
	 */
	 ((lex->orig_sql_command == SQLCOM_SHOW_TABLES ||
           lex->orig_sql_command == SQLCOM_SHOW_TABLE_STATUS) &&
	  (base_name= select_lex->db) && !bases.elements))
  {
#ifndef NO_EMBEDDED_ACCESS_CHECKS
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    if (with_i_schema ||   // don't check the rights if information schema db
        !check_access(thd,SELECT_ACL, base_name, &thd->col_access,0,1) ||
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        thd->master_access & (DB_ACLS | SHOW_DB_ACL) ||
	acl_get(thd->host, thd->ip, thd->priv_user, base_name,0) ||
	(grant_option && !check_grant_db(thd, base_name)))
#endif
    {
      List<char> files;
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      if (with_i_schema)                      // information schema table names
      {
        if (schema_tables_add(thd, &files, idx_field_vals.table_value))
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          goto err;
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      }
      else
      {
        strxmov(path, mysql_data_home, "/", base_name, NullS);
        end= path + (len= unpack_dirname(path,path));
        len= FN_LEN - len;
        if (mysql_find_files(thd, &files, base_name, 
                             path, idx_field_vals.table_value, 0))
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          goto err;
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      }
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      List_iterator_fast<char> it_files(files);
      while ((file_name= it_files++))
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      {
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	restore_record(table, s->default_values);
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        table->field[schema_table->idx_field1]->
          store(base_name, strlen(base_name), system_charset_info);
        table->field[schema_table->idx_field2]->
          store(file_name, strlen(file_name),system_charset_info);
        if (!partial_cond || partial_cond->val_int())
        {
          if (schema_table_idx == SCH_TABLE_NAMES)
          {
            if (lex->verbose || lex->orig_sql_command == SQLCOM_END)
            {
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              if (with_i_schema)
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              {
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                table->field[3]->store("TEMPORARY", 9, system_charset_info);
              }
              else
              {
                my_snprintf(end, len, "/%s%s", file_name, reg_ext);
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                switch (mysql_frm_type(path)) {
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                case FRMTYPE_ERROR:
                  table->field[3]->store("ERROR", 5, system_charset_info);
                  break;
                case FRMTYPE_TABLE:
                  table->field[3]->store("BASE TABLE", 10, system_charset_info);
                  break;
                case FRMTYPE_VIEW:
                  table->field[3]->store("VIEW", 4, system_charset_info);
                  break;
                default:
                  DBUG_ASSERT(0);
                }
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              }
            }
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            if (schema_table_store_record(thd, table))
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              goto err;
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          }
          else
          {
            int res;
            TABLE *old_open_tables= thd->open_tables;
            if (make_table_list(thd, &sel, base_name, file_name))
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              goto err;
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            TABLE_LIST *show_table_list= (TABLE_LIST*) sel.table_list.first;
            show_table_list->lock_type= lock_type;
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            lex->all_selects_list= &sel;
            lex->derived_tables= 0;
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            res= open_and_lock_tables(thd, show_table_list);
            if (schema_table->process_table(thd, show_table_list, table,
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                                            res, base_name,
                                            show_table_list->alias))
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              goto err;
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            close_thread_tables(thd, 0, 0, old_open_tables);
          }
        }
      }
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      /*
        If we have information schema its always the first table and only
        the first table. Reset for other tables.
      */
2060
      with_i_schema= 0;
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    }
  }
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  error= 0;
err:
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  lex->derived_tables= derived_tables;
  lex->all_selects_list= old_all_select_lex;
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  DBUG_RETURN(error);
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}


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bool store_schema_shemata(THD* thd, TABLE *table, const char *db_name,
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                          CHARSET_INFO *cs)
2074
{
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  restore_record(table, s->default_values);
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  table->field[1]->store(db_name, strlen(db_name), system_charset_info);
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  table->field[2]->store(cs->csname, strlen(cs->csname), system_charset_info);
  table->field[3]->store(cs->name, strlen(cs->name), system_charset_info);
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  return schema_table_store_record(thd, table);
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}


2083 2084
int fill_schema_shemata(THD *thd, TABLE_LIST *tables, COND *cond)
{
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  char path[FN_REFLEN];
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  bool found_libchar;
  INDEX_FIELD_VALUES idx_field_vals;
  List<char> files;
  char *file_name;
  uint length;
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  bool with_i_schema;
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  HA_CREATE_INFO create;
  TABLE *table= tables->table;
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  DBUG_ENTER("fill_schema_shemata");
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  if (make_db_list(thd, &files, &idx_field_vals,
                   &with_i_schema, 1))
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    DBUG_RETURN(1);
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  List_iterator_fast<char> it(files);
  while ((file_name=it++))
  {
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    if (with_i_schema)       // information schema name is always first in list
    {
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      if (store_schema_shemata(thd, table, file_name,
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                               system_charset_info))
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        DBUG_RETURN(1);
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      with_i_schema= 0;
      continue;
    }
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#ifndef NO_EMBEDDED_ACCESS_CHECKS
    if (thd->master_access & (DB_ACLS | SHOW_DB_ACL) ||
	acl_get(thd->host, thd->ip, thd->priv_user, file_name,0) ||
	(grant_option && !check_grant_db(thd, file_name)))
#endif
    {
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      strxmov(path, mysql_data_home, "/", file_name, NullS);
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      length=unpack_dirname(path,path);		// Convert if not unix
      found_libchar= 0;
      if (length && path[length-1] == FN_LIBCHAR)
      {
	found_libchar= 1;
	path[length-1]=0;			// remove ending '\'
      }

      if (found_libchar)
	path[length-1]= FN_LIBCHAR;
      strmov(path+length, MY_DB_OPT_FILE);
      load_db_opt(thd, path, &create);
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      if (store_schema_shemata(thd, table, file_name, 
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                               create.default_table_charset))
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        DBUG_RETURN(1);
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    }
  }
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  DBUG_RETURN(0);
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}


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static int get_schema_tables_record(THD *thd, struct st_table_list *tables,
				    TABLE *table, bool res,
				    const char *base_name,
				    const char *file_name)
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{
  const char *tmp_buff;
  TIME time;
  CHARSET_INFO *cs= system_charset_info;
  DBUG_ENTER("get_schema_tables_record");
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  restore_record(table, s->default_values);
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  table->field[1]->store(base_name, strlen(base_name), cs);
  table->field[2]->store(file_name, strlen(file_name), cs);
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  if (res)
  {
    /*
      there was errors during opening tables
    */
    const char *error= thd->net.last_error;
    table->field[20]->store(error, strlen(error), cs);
    thd->clear_error();
  }
  else if (tables->view)
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  {
    table->field[3]->store("VIEW", 4, cs);
    table->field[20]->store("view", 4, cs);
  }
  else
  {
    TABLE *show_table= tables->table;
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    TABLE_SHARE *share= show_table->s;
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    handler *file= show_table->file;
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    file->info(HA_STATUS_VARIABLE | HA_STATUS_TIME | HA_STATUS_NO_LOCK);
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    if (share->tmp_table == TMP_TABLE)
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      table->field[3]->store("TEMPORARY", 9, cs);
    else
      table->field[3]->store("BASE TABLE", 10, cs);

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    for (int i= 4; i < 20; i++)
    {
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      if (i == 7 || (i > 12 && i < 17) || i == 18)
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        continue;
      table->field[i]->set_notnull();
    }
    tmp_buff= file->table_type();
    table->field[4]->store(tmp_buff, strlen(tmp_buff), cs);
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    table->field[5]->store((longlong) share->frm_version);
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    enum row_type row_type = file->get_row_type();
    switch (row_type) {
    case ROW_TYPE_NOT_USED:
    case ROW_TYPE_DEFAULT:
      tmp_buff= ((share->db_options_in_use &
		  HA_OPTION_COMPRESS_RECORD) ? "Compressed" :
		 (share->db_options_in_use & HA_OPTION_PACK_RECORD) ?
		 "Dynamic" : "Fixed");
      break;
    case ROW_TYPE_FIXED:
      tmp_buff= "Fixed";
      break;
    case ROW_TYPE_DYNAMIC:
      tmp_buff= "Dynamic";
      break;
    case ROW_TYPE_COMPRESSED:
      tmp_buff= "Compressed";
      break;
    case ROW_TYPE_REDUNDANT:
      tmp_buff= "Redundant";
      break;
    case ROW_TYPE_COMPACT:
      tmp_buff= "Compact";
      break;
    }
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    table->field[6]->store(tmp_buff, strlen(tmp_buff), cs);
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    if (!tables->schema_table)
    {
      table->field[7]->store((longlong) file->records);
      table->field[7]->set_notnull();
    }
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    table->field[8]->store((longlong) file->mean_rec_length);
    table->field[9]->store((longlong) file->data_file_length);
    if (file->max_data_file_length)
    {
      table->field[10]->store((longlong) file->max_data_file_length);
    }
    table->field[11]->store((longlong) file->index_file_length);
    table->field[12]->store((longlong) file->delete_length);
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    if (show_table->found_next_number_field)
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    {
      show_table->next_number_field=show_table->found_next_number_field;
      show_table->next_number_field->reset();
      file->update_auto_increment();
      table->field[13]->store((longlong) show_table->
                              next_number_field->val_int());
      table->field[13]->set_notnull();
      show_table->next_number_field=0;
    }
    if (file->create_time)
    {
      thd->variables.time_zone->gmt_sec_to_TIME(&time,
                                                file->create_time);
      table->field[14]->store_time(&time, MYSQL_TIMESTAMP_DATETIME);
      table->field[14]->set_notnull();
    }
    if (file->update_time)
    {
      thd->variables.time_zone->gmt_sec_to_TIME(&time,
                                                file->update_time);
      table->field[15]->store_time(&time, MYSQL_TIMESTAMP_DATETIME);
      table->field[15]->set_notnull();
    }
    if (file->check_time)
    {
      thd->variables.time_zone->gmt_sec_to_TIME(&time, file->check_time);
      table->field[16]->store_time(&time, MYSQL_TIMESTAMP_DATETIME);
      table->field[16]->set_notnull();
    }
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    tmp_buff= (share->table_charset ?
               share->table_charset->name : "default");
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    table->field[17]->store(tmp_buff, strlen(tmp_buff), cs);
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    if (file->table_flags() & (ulong) HA_HAS_CHECKSUM)
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    {
      table->field[18]->store((longlong) file->checksum());
      table->field[18]->set_notnull();
    }

    char option_buff[350],*ptr;
    ptr=option_buff;
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    if (share->min_rows)
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    {
      ptr=strmov(ptr," min_rows=");
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      ptr=longlong10_to_str(share->min_rows,ptr,10);
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    }
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    if (share->max_rows)
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    {
      ptr=strmov(ptr," max_rows=");
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      ptr=longlong10_to_str(share->max_rows,ptr,10);
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    }
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    if (share->avg_row_length)
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    {
      ptr=strmov(ptr," avg_row_length=");
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      ptr=longlong10_to_str(share->avg_row_length,ptr,10);
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    }
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    if (share->db_create_options & HA_OPTION_PACK_KEYS)
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      ptr=strmov(ptr," pack_keys=1");
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    if (share->db_create_options & HA_OPTION_NO_PACK_KEYS)
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      ptr=strmov(ptr," pack_keys=0");
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    if (share->db_create_options & HA_OPTION_CHECKSUM)
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      ptr=strmov(ptr," checksum=1");
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    if (share->db_create_options & HA_OPTION_DELAY_KEY_WRITE)
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      ptr=strmov(ptr," delay_key_write=1");
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    if (share->row_type != ROW_TYPE_DEFAULT)
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      ptr=strxmov(ptr, " row_format=", 
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                  ha_row_type[(uint) share->row_type],
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                  NullS);
    if (file->raid_type)
    {
      char buff[100];
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      my_snprintf(buff,sizeof(buff),
                  " raid_type=%s raid_chunks=%d raid_chunksize=%ld",
                  my_raid_type(file->raid_type), file->raid_chunks,
                  file->raid_chunksize/RAID_BLOCK_SIZE);
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      ptr=strmov(ptr,buff);
    }
    table->field[19]->store(option_buff+1,
                            (ptr == option_buff ? 0 : 
                             (uint) (ptr-option_buff)-1), cs);
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    {
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      char *comment;
      comment= show_table->file->update_table_comment(share->comment);
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      if (comment)
      {
        table->field[20]->store(comment, strlen(comment), cs);
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        if (comment != share->comment)
          my_free(comment, MYF(0));
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      }
    }
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  }
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  DBUG_RETURN(schema_table_store_record(thd, table));
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}


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static int get_schema_column_record(THD *thd, struct st_table_list *tables,
				    TABLE *table, bool res,
				    const char *base_name,
				    const char *file_name)
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{
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  LEX *lex= thd->lex;
  const char *wild= lex->wild ? lex->wild->ptr() : NullS;
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  CHARSET_INFO *cs= system_charset_info;
  DBUG_ENTER("get_schema_column_record");
  if (res)
  {
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    if (lex->orig_sql_command != SQLCOM_SHOW_FIELDS)
    {
      /*
        I.e. we are in SELECT FROM INFORMATION_SCHEMA.COLUMS
        rather than in SHOW COLUMNS
      */ 
      push_warning(thd, MYSQL_ERROR::WARN_LEVEL_WARN,
                   thd->net.last_errno, thd->net.last_error);
      thd->clear_error();
      res= 0;
    }
    DBUG_RETURN(res);
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  }

  TABLE *show_table= tables->table;
  handler *file= show_table->file;
  file->info(HA_STATUS_VARIABLE | HA_STATUS_NO_LOCK);
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  restore_record(show_table, s->default_values);
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  Field **ptr,*field;
  int count= 0;
  for (ptr=show_table->field; (field= *ptr) ; ptr++)
  {
    if (!wild || !wild[0] || 
        !wild_case_compare(system_charset_info, field->field_name,wild))
    {
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      const char *tmp_buff;
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      byte *pos;
      uint flags=field->flags;
      char tmp[MAX_FIELD_WIDTH];
      char tmp1[MAX_FIELD_WIDTH];
      String type(tmp,sizeof(tmp), system_charset_info);
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      char *end= tmp;
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      count++;
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      restore_record(table, s->default_values);
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#ifndef NO_EMBEDDED_ACCESS_CHECKS
      uint col_access;
      check_access(thd,SELECT_ACL | EXTRA_ACL, base_name,
                   &tables->grant.privilege, 0, 0);
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      col_access= get_column_grant(thd, &tables->grant, 
                                   base_name, file_name,
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                                   field->field_name) & COL_ACLS;
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      if (lex->orig_sql_command != SQLCOM_SHOW_FIELDS  && 
          !tables->schema_table && !col_access)
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        continue;
      for (uint bitnr=0; col_access ; col_access>>=1,bitnr++)
      {
        if (col_access & 1)
        {
          *end++=',';
          end=strmov(end,grant_types.type_names[bitnr]);
        }
      }
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      if (tables->schema_table)      // any user has 'select' privilege on all 
                                     // I_S table columns
        table->field[17]->store(grant_types.type_names[0],
                                strlen(grant_types.type_names[0]), cs);
      else
        table->field[17]->store(tmp+1,end == tmp ? 0 : (uint) (end-tmp-1), cs);
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#else
      *end= 0;
#endif
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      table->field[1]->store(base_name, strlen(base_name), cs);
      table->field[2]->store(file_name, strlen(file_name), cs);
      table->field[3]->store(field->field_name, strlen(field->field_name),
                             cs);
      table->field[4]->store((longlong) count);
      field->sql_type(type);
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      table->field[14]->store(type.ptr(), type.length(), cs);		
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      tmp_buff= strchr(type.ptr(), '(');
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      table->field[7]->store(type.ptr(),
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                             (tmp_buff ? tmp_buff - type.ptr() :
                              type.length()), cs);
      if (show_table->timestamp_field == field &&
          field->unireg_check != Field::TIMESTAMP_UN_FIELD)
      {
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        table->field[5]->store("CURRENT_TIMESTAMP", 17, cs);
        table->field[5]->set_notnull();
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      }
      else if (field->unireg_check != Field::NEXT_NUMBER &&
               !field->is_null() &&
               !(field->flags & NO_DEFAULT_VALUE_FLAG))
      {
        String def(tmp1,sizeof(tmp1), cs);
        type.set(tmp, sizeof(tmp), field->charset());
        field->val_str(&type);
        uint dummy_errors;
        def.copy(type.ptr(), type.length(), type.charset(), cs, &dummy_errors);
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        table->field[5]->store(def.ptr(), def.length(), def.charset());
        table->field[5]->set_notnull();
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      }
      else if (field->unireg_check == Field::NEXT_NUMBER ||
               field->maybe_null())
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        table->field[5]->set_null();                // Null as default
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      else
      {
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        table->field[5]->store("",0, cs);
        table->field[5]->set_notnull();
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      }
      pos=(byte*) ((flags & NOT_NULL_FLAG) &&
                   field->type() != FIELD_TYPE_TIMESTAMP ?
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                   "NO" : "YES");
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      table->field[6]->store((const char*) pos,
                             strlen((const char*) pos), cs);
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      if (field->has_charset())
      {
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        table->field[8]->store((longlong) field->field_length/
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                               field->charset()->mbmaxlen);
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        table->field[8]->set_notnull();
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        table->field[9]->store((longlong) field->field_length);
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        table->field[9]->set_notnull();
      }
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      {
        uint dec =field->decimals();
        switch (field->type()) {
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        case FIELD_TYPE_NEWDECIMAL:
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          table->field[10]->store((longlong)
                                  ((Field_new_decimal*)field)->precision);
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          table->field[10]->set_notnull();
          table->field[11]->store((longlong) field->decimals());
          table->field[11]->set_notnull();
          break;
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        case FIELD_TYPE_DECIMAL:
        {
          uint int_part=field->field_length - (dec  ? dec + 1 : 0);
          table->field[10]->store((longlong) (int_part + dec - 1));
          table->field[10]->set_notnull();
          table->field[11]->store((longlong) field->decimals());
          table->field[11]->set_notnull();
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          break;
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        }
        case FIELD_TYPE_TINY:
        case FIELD_TYPE_SHORT:
        case FIELD_TYPE_LONG:
        case FIELD_TYPE_LONGLONG:
        case FIELD_TYPE_INT24:
        case FIELD_TYPE_FLOAT:  
        case FIELD_TYPE_DOUBLE:
        {
          table->field[10]->store((longlong) field->field_length);
          table->field[10]->set_notnull();
          if (dec != NOT_FIXED_DEC)
          {
            table->field[11]->store((longlong) dec);
            table->field[11]->set_notnull();
          }
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          break;
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        }
        default:
          break;
        }
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      }
      if (field->has_charset())
      {
        pos=(byte*) field->charset()->csname;
        table->field[12]->store((const char*) pos,
                                strlen((const char*) pos), cs);
        table->field[12]->set_notnull();
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        pos=(byte*) field->charset()->name;
        table->field[13]->store((const char*) pos,
                                strlen((const char*) pos), cs);
        table->field[13]->set_notnull();
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      }
      pos=(byte*) ((field->flags & PRI_KEY_FLAG) ? "PRI" :
                   (field->flags & UNIQUE_KEY_FLAG) ? "UNI" :
                   (field->flags & MULTIPLE_KEY_FLAG) ? "MUL":"");
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      table->field[15]->store((const char*) pos,
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                              strlen((const char*) pos), cs);
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      end= tmp;
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      if (field->unireg_check == Field::NEXT_NUMBER)
        end=strmov(tmp,"auto_increment");
      table->field[16]->store(tmp, (uint) (end-tmp), cs);
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      end=tmp;
      table->field[18]->store(field->comment.str, field->comment.length, cs);
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      if (schema_table_store_record(thd, table))
        DBUG_RETURN(1);
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    }
  }
  DBUG_RETURN(0);
}



int fill_schema_charsets(THD *thd, TABLE_LIST *tables, COND *cond)
{
  CHARSET_INFO **cs;
  const char *wild= thd->lex->wild ? thd->lex->wild->ptr() : NullS;
  TABLE *table= tables->table;
  CHARSET_INFO *scs= system_charset_info;
  for ( cs= all_charsets ; cs < all_charsets+255 ; cs++ )
  {
    CHARSET_INFO *tmp_cs= cs[0];
    if (tmp_cs && (tmp_cs->state & MY_CS_PRIMARY) && 
        (tmp_cs->state & MY_CS_AVAILABLE) &&
        !(wild && wild[0] &&
	  wild_case_compare(scs, tmp_cs->csname,wild)))
    {
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      restore_record(table, s->default_values);
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      table->field[0]->store(tmp_cs->csname, strlen(tmp_cs->csname), scs);
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      table->field[1]->store(tmp_cs->name, strlen(tmp_cs->name), scs);
      table->field[2]->store(tmp_cs->comment ? tmp_cs->comment : "",
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			     strlen(tmp_cs->comment ? tmp_cs->comment : ""),
                             scs);
      table->field[3]->store((longlong) tmp_cs->mbmaxlen);
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      if (schema_table_store_record(thd, table))
        return 1;
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    }
  }
  return 0;
}


int fill_schema_collation(THD *thd, TABLE_LIST *tables, COND *cond)
{
  CHARSET_INFO **cs;
  const char *wild= thd->lex->wild ? thd->lex->wild->ptr() : NullS;
  TABLE *table= tables->table;
  CHARSET_INFO *scs= system_charset_info;
  for ( cs= all_charsets ; cs < all_charsets+255 ; cs++ )
  {
    CHARSET_INFO **cl;
    CHARSET_INFO *tmp_cs= cs[0];
    if (!tmp_cs || !(tmp_cs->state & MY_CS_AVAILABLE) || 
        !(tmp_cs->state & MY_CS_PRIMARY))
      continue;
    for ( cl= all_charsets; cl < all_charsets+255 ;cl ++)
    {
      CHARSET_INFO *tmp_cl= cl[0];
      if (!tmp_cl || !(tmp_cl->state & MY_CS_AVAILABLE) || 
          !my_charset_same(tmp_cs, tmp_cl))
	continue;
      if (!(wild && wild[0] &&
	  wild_case_compare(scs, tmp_cl->name,wild)))
      {
	const char *tmp_buff;
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	restore_record(table, s->default_values);
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	table->field[0]->store(tmp_cl->name, strlen(tmp_cl->name), scs);
        table->field[1]->store(tmp_cl->csname , strlen(tmp_cl->csname), scs);
        table->field[2]->store((longlong) tmp_cl->number);
        tmp_buff= (tmp_cl->state & MY_CS_PRIMARY) ? "Yes" : "";
	table->field[3]->store(tmp_buff, strlen(tmp_buff), scs);
        tmp_buff= (tmp_cl->state & MY_CS_COMPILED)? "Yes" : "";
	table->field[4]->store(tmp_buff, strlen(tmp_buff), scs);
        table->field[5]->store((longlong) tmp_cl->strxfrm_multiply);
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        if (schema_table_store_record(thd, table))
          return 1;
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      }
    }
  }
  return 0;
}


int fill_schema_coll_charset_app(THD *thd, TABLE_LIST *tables, COND *cond)
{
  CHARSET_INFO **cs;
  TABLE *table= tables->table;
  CHARSET_INFO *scs= system_charset_info;
  for ( cs= all_charsets ; cs < all_charsets+255 ; cs++ )
  {
    CHARSET_INFO **cl;
    CHARSET_INFO *tmp_cs= cs[0];
    if (!tmp_cs || !(tmp_cs->state & MY_CS_AVAILABLE) || 
        !(tmp_cs->state & MY_CS_PRIMARY))
      continue;
    for ( cl= all_charsets; cl < all_charsets+255 ;cl ++)
    {
      CHARSET_INFO *tmp_cl= cl[0];
      if (!tmp_cl || !(tmp_cl->state & MY_CS_AVAILABLE) || 
          !my_charset_same(tmp_cs,tmp_cl))
	continue;
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      restore_record(table, s->default_values);
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      table->field[0]->store(tmp_cl->name, strlen(tmp_cl->name), scs);
      table->field[1]->store(tmp_cl->csname , strlen(tmp_cl->csname), scs);
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      if (schema_table_store_record(thd, table))
        return 1;
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    }
  }
  return 0;
}


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bool store_schema_proc(THD *thd, TABLE *table, TABLE *proc_table,
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                       const char *wild, bool full_access, const char *sp_user)
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{
  String tmp_string;
  TIME time;
  LEX *lex= thd->lex;
  CHARSET_INFO *cs= system_charset_info;
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  const char *sp_db, *sp_name, *definer;
  sp_db= get_field(thd->mem_root, proc_table->field[0]);
  sp_name= get_field(thd->mem_root, proc_table->field[1]);
  definer= get_field(thd->mem_root, proc_table->field[11]);
  if (!full_access)
    full_access= !strcmp(sp_user, definer);
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  if (!full_access && check_some_routine_access(thd, sp_db, sp_name,
			proc_table->field[2]->val_int() == TYPE_ENUM_PROCEDURE))
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    return 0;
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  if (lex->orig_sql_command == SQLCOM_SHOW_STATUS_PROC &&
      proc_table->field[2]->val_int() == TYPE_ENUM_PROCEDURE ||
      lex->orig_sql_command == SQLCOM_SHOW_STATUS_FUNC &&
      proc_table->field[2]->val_int() == TYPE_ENUM_FUNCTION ||
      lex->orig_sql_command == SQLCOM_END)
  {
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    restore_record(table, s->default_values);
    if (!wild || !wild[0] || !wild_compare(sp_name, wild, 0))
2642
    {
2643
      table->field[3]->store(sp_name, strlen(sp_name), cs);
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      get_field(thd->mem_root, proc_table->field[3], &tmp_string);
      table->field[0]->store(tmp_string.ptr(), tmp_string.length(), cs);
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      table->field[2]->store(sp_db, strlen(sp_db), cs);
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      get_field(thd->mem_root, proc_table->field[2], &tmp_string);
      table->field[4]->store(tmp_string.ptr(), tmp_string.length(), cs);
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      if (proc_table->field[2]->val_int() == TYPE_ENUM_FUNCTION)
      {
        get_field(thd->mem_root, proc_table->field[9], &tmp_string);
        table->field[5]->store(tmp_string.ptr(), tmp_string.length(), cs);
        table->field[5]->set_notnull();
      }
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      if (full_access)
      {
        get_field(thd->mem_root, proc_table->field[10], &tmp_string);
        table->field[7]->store(tmp_string.ptr(), tmp_string.length(), cs);
      }
2660
      table->field[6]->store("SQL", 3, cs);
2661
      table->field[10]->store("SQL", 3, cs);
2662
      get_field(thd->mem_root, proc_table->field[6], &tmp_string);
2663
      table->field[11]->store(tmp_string.ptr(), tmp_string.length(), cs);
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      if (proc_table->field[5]->val_int() == SP_CONTAINS_SQL)
      {
        table->field[12]->store("CONTAINS SQL", 12 , cs);
      }
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      get_field(thd->mem_root, proc_table->field[7], &tmp_string);
      table->field[14]->store(tmp_string.ptr(), tmp_string.length(), cs);
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      bzero((char *)&time, sizeof(time));
      ((Field_timestamp *) proc_table->field[12])->get_time(&time);
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      table->field[15]->store_time(&time, MYSQL_TIMESTAMP_DATETIME);
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      bzero((char *)&time, sizeof(time));
      ((Field_timestamp *) proc_table->field[13])->get_time(&time);
2675
      table->field[16]->store_time(&time, MYSQL_TIMESTAMP_DATETIME);
2676
      get_field(thd->mem_root, proc_table->field[14], &tmp_string);
2677
      table->field[17]->store(tmp_string.ptr(), tmp_string.length(), cs);
2678
      get_field(thd->mem_root, proc_table->field[15], &tmp_string);
2679
      table->field[18]->store(tmp_string.ptr(), tmp_string.length(), cs);
2680
      table->field[19]->store(definer, strlen(definer), cs);
2681
      return schema_table_store_record(thd, table);
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    }
  }
2684
  return 0;
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}


int fill_schema_proc(THD *thd, TABLE_LIST *tables, COND *cond)
{
  TABLE *proc_table;
  TABLE_LIST proc_tables;
  const char *wild= thd->lex->wild ? thd->lex->wild->ptr() : NullS;
  int res= 0;
  TABLE *table= tables->table, *old_open_tables= thd->open_tables;
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  bool full_access;
  char definer[HOSTNAME_LENGTH+USERNAME_LENGTH+2];
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  DBUG_ENTER("fill_schema_proc");

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  strxmov(definer, thd->priv_user, "@", thd->priv_host, NullS);
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  bzero((char*) &proc_tables,sizeof(proc_tables));
  proc_tables.db= (char*) "mysql";
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  proc_tables.db_length= 5;
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  proc_tables.table_name= proc_tables.alias= (char*) "proc";
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  proc_tables.table_name_length= 4;
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  proc_tables.lock_type= TL_READ;
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  full_access= !check_table_access(thd, SELECT_ACL, &proc_tables, 1);
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  if (!(proc_table= open_ltable(thd, &proc_tables, TL_READ)))
  {
    DBUG_RETURN(1);
  }
  proc_table->file->ha_index_init(0);
  if ((res= proc_table->file->index_first(proc_table->record[0])))
  {
    res= (res == HA_ERR_END_OF_FILE) ? 0 : 1;
    goto err;
  }
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  if (store_schema_proc(thd, table, proc_table, wild, full_access, definer))
  {
    res= 1;
    goto err;
  }
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  while (!proc_table->file->index_next(proc_table->record[0]))
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  {
    if (store_schema_proc(thd, table, proc_table, wild, full_access, definer))
    {
      res= 1;
      goto err;
    }
  }
2730 2731 2732 2733 2734 2735 2736 2737

err:
  proc_table->file->ha_index_end();
  close_thread_tables(thd, 0, 0, old_open_tables);
  DBUG_RETURN(res);
}


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static int get_schema_stat_record(THD *thd, struct st_table_list *tables,
				  TABLE *table, bool res,
				  const char *base_name,
				  const char *file_name)
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{
  CHARSET_INFO *cs= system_charset_info;
  DBUG_ENTER("get_schema_stat_record");
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  if (res)
  {
    if (thd->lex->orig_sql_command != SQLCOM_SHOW_KEYS)
    {
      /*
        I.e. we are in SELECT FROM INFORMATION_SCHEMA.STATISTICS
        rather than in SHOW KEYS
      */ 
      if (!tables->view)
        push_warning(thd, MYSQL_ERROR::WARN_LEVEL_WARN,
                     thd->net.last_errno, thd->net.last_error);
      thd->clear_error();
      res= 0;
    }
    DBUG_RETURN(res);
  }
  else if (!tables->view)
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  {
    TABLE *show_table= tables->table;
    KEY *key_info=show_table->key_info;
    show_table->file->info(HA_STATUS_VARIABLE | 
                           HA_STATUS_NO_LOCK |
                           HA_STATUS_TIME);
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    for (uint i=0 ; i < show_table->s->keys ; i++,key_info++)
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    {
      KEY_PART_INFO *key_part= key_info->key_part;
      const char *str;
      for (uint j=0 ; j < key_info->key_parts ; j++,key_part++)
      {
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        restore_record(table, s->default_values);
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        table->field[1]->store(base_name, strlen(base_name), cs);
        table->field[2]->store(file_name, strlen(file_name), cs);
        table->field[3]->store((longlong) ((key_info->flags & 
                                            HA_NOSAME) ? 0 :1));
        table->field[4]->store(base_name, strlen(base_name), cs);
        table->field[5]->store(key_info->name, strlen(key_info->name), cs);
        table->field[6]->store((longlong) (j+1));
        str=(key_part->field ? key_part->field->field_name :
             "?unknown field?");
        table->field[7]->store(str, strlen(str), cs);
        if (show_table->file->index_flags(i, j, 0) & HA_READ_ORDER)
        {
          table->field[8]->store(((key_part->key_part_flag &
                                   HA_REVERSE_SORT) ?
                                  "D" : "A"), 1, cs);
          table->field[8]->set_notnull();
        }
        KEY *key=show_table->key_info+i;
        if (key->rec_per_key[j])
        {
          ha_rows records=(show_table->file->records /
                           key->rec_per_key[j]);
          table->field[9]->store((longlong) records);
          table->field[9]->set_notnull();
        }
        if (!(key_info->flags & HA_FULLTEXT) && 
            (!key_part->field ||
             key_part->length != 
             show_table->field[key_part->fieldnr-1]->key_length()))
        {
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          table->field[10]->store((longlong) key_part->length / 
                                  key_part->field->charset()->mbmaxlen);
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          table->field[10]->set_notnull();
        }
        uint flags= key_part->field ? key_part->field->flags : 0;
        const char *pos=(char*) ((flags & NOT_NULL_FLAG) ? "" : "YES");
        table->field[12]->store(pos, strlen(pos), cs);
        pos= show_table->file->index_type(i);
        table->field[13]->store(pos, strlen(pos), cs);
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        if (!show_table->s->keys_in_use.is_set(i))
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          table->field[14]->store("disabled", 8, cs);
        else
          table->field[14]->store("", 0, cs);
        table->field[14]->set_notnull();
2819 2820
        if (schema_table_store_record(thd, table))
          DBUG_RETURN(1);
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      }
    }
  }
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  DBUG_RETURN(res);
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}


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static int get_schema_views_record(THD *thd, struct st_table_list *tables,
				   TABLE *table, bool res,
				   const char *base_name,
				   const char *file_name)
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{
  CHARSET_INFO *cs= system_charset_info;
  DBUG_ENTER("get_schema_views_record");
  if (!res)
  {
    if (tables->view)
    {
2839
      restore_record(table, s->default_values);
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      table->field[1]->store(tables->view_db.str, tables->view_db.length, cs);
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      table->field[2]->store(tables->view_name.str, tables->view_name.length,
                             cs);
2843
      table->field[3]->store(tables->query.str, tables->query.length, cs);
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      if (tables->with_check != VIEW_CHECK_NONE)
      {
        if (tables->with_check == VIEW_CHECK_LOCAL)
2848
          table->field[4]->store("LOCAL", 5, cs);
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        else
2850
          table->field[4]->store("CASCADED", 8, cs);
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      }
      else
        table->field[4]->store("NONE", 4, cs);

2855 2856 2857 2858
      if (tables->updatable_view)
        table->field[5]->store("YES", 3, cs);
      else
        table->field[5]->store("NO", 2, cs);
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      DBUG_RETURN(schema_table_store_record(thd, table));
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    }
  }
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  else
  {
    if (tables->view)
      push_warning(thd, MYSQL_ERROR::WARN_LEVEL_WARN, 
                   thd->net.last_errno, thd->net.last_error);
    thd->clear_error();
  }
  DBUG_RETURN(0);
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}


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bool store_constraints(THD *thd, TABLE *table, const char *db,
                       const char *tname, const char *key_name,
                       uint key_len, const char *con_type, uint con_len)
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{
  CHARSET_INFO *cs= system_charset_info;
2878
  restore_record(table, s->default_values);
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  table->field[1]->store(db, strlen(db), cs);
  table->field[2]->store(key_name, key_len, cs);
  table->field[3]->store(db, strlen(db), cs);
  table->field[4]->store(tname, strlen(tname), cs);
  table->field[5]->store(con_type, con_len, cs);
2884
  return schema_table_store_record(thd, table);
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}


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static int get_schema_constraints_record(THD *thd, struct st_table_list *tables,
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					 TABLE *table, bool res,
					 const char *base_name,
					 const char *file_name)
2892
{
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  DBUG_ENTER("get_schema_constraints_record");
2894 2895 2896 2897 2898 2899 2900 2901 2902
  if (res)
  {
    if (!tables->view)
      push_warning(thd, MYSQL_ERROR::WARN_LEVEL_WARN,
                   thd->net.last_errno, thd->net.last_error);
    thd->clear_error();
    DBUG_RETURN(0);
  }
  else if (!tables->view)
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  {
    List<FOREIGN_KEY_INFO> f_key_list;
    TABLE *show_table= tables->table;
    KEY *key_info=show_table->key_info;
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    uint primary_key= show_table->s->primary_key;
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    show_table->file->info(HA_STATUS_VARIABLE | 
                           HA_STATUS_NO_LOCK |
                           HA_STATUS_TIME);
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    for (uint i=0 ; i < show_table->s->keys ; i++, key_info++)
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    {
      if (i != primary_key && !(key_info->flags & HA_NOSAME))
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        continue;

2916
      if (i == primary_key && !strcmp(key_info->name, primary_key_name))
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      {
        if (store_constraints(thd, table, base_name, file_name, key_info->name,
                              strlen(key_info->name), "PRIMARY KEY", 11))
          DBUG_RETURN(1);
      }
2922
      else if (key_info->flags & HA_NOSAME)
2923 2924 2925 2926 2927
      {
        if (store_constraints(thd, table, base_name, file_name, key_info->name,
                              strlen(key_info->name), "UNIQUE", 6))
          DBUG_RETURN(1);
      }
2928 2929 2930 2931 2932 2933 2934
    }

    show_table->file->get_foreign_key_list(thd, &f_key_list);
    FOREIGN_KEY_INFO *f_key_info;
    List_iterator_fast<FOREIGN_KEY_INFO> it(f_key_list);
    while ((f_key_info=it++))
    {
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      if (store_constraints(thd, table, base_name, file_name, 
                            f_key_info->forein_id->str,
                            strlen(f_key_info->forein_id->str),
                            "FOREIGN KEY", 11))
        DBUG_RETURN(1);
2940 2941
    }
  }
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  DBUG_RETURN(res);
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}


2946 2947 2948 2949 2950 2951 2952 2953 2954 2955 2956 2957 2958 2959
void store_key_column_usage(TABLE *table, const char*db, const char *tname,
                            const char *key_name, uint key_len, 
                            const char *con_type, uint con_len, longlong idx)
{
  CHARSET_INFO *cs= system_charset_info;
  table->field[1]->store(db, strlen(db), cs);
  table->field[2]->store(key_name, key_len, cs);
  table->field[4]->store(db, strlen(db), cs);
  table->field[5]->store(tname, strlen(tname), cs);
  table->field[6]->store(con_type, con_len, cs);
  table->field[7]->store((longlong) idx);
}


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static int get_schema_key_column_usage_record(THD *thd,
					      struct st_table_list *tables,
					      TABLE *table, bool res,
					      const char *base_name,
					      const char *file_name)
2965 2966
{
  DBUG_ENTER("get_schema_key_column_usage_record");
2967 2968 2969 2970 2971 2972 2973 2974 2975
  if (res)
  {
    if (!tables->view)
      push_warning(thd, MYSQL_ERROR::WARN_LEVEL_WARN,
                   thd->net.last_errno, thd->net.last_error);
    thd->clear_error();
    DBUG_RETURN(0);
  }
  else if (!tables->view)
2976 2977 2978 2979
  {
    List<FOREIGN_KEY_INFO> f_key_list;
    TABLE *show_table= tables->table;
    KEY *key_info=show_table->key_info;
2980
    uint primary_key= show_table->s->primary_key;
2981 2982 2983
    show_table->file->info(HA_STATUS_VARIABLE | 
                           HA_STATUS_NO_LOCK |
                           HA_STATUS_TIME);
2984
    for (uint i=0 ; i < show_table->s->keys ; i++, key_info++)
2985 2986
    {
      if (i != primary_key && !(key_info->flags & HA_NOSAME))
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        continue;
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      uint f_idx= 0;
      KEY_PART_INFO *key_part= key_info->key_part;
      for (uint j=0 ; j < key_info->key_parts ; j++,key_part++)
      {
        if (key_part->field)
        {
          f_idx++;
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          restore_record(table, s->default_values);
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          store_key_column_usage(table, base_name, file_name,
                                 key_info->name,
                                 strlen(key_info->name), 
                                 key_part->field->field_name, 
                                 strlen(key_part->field->field_name),
                                 (longlong) f_idx);
3002 3003
          if (schema_table_store_record(thd, table))
            DBUG_RETURN(1);
3004 3005 3006 3007 3008 3009 3010 3011 3012
        }
      }
    }

    show_table->file->get_foreign_key_list(thd, &f_key_list);
    FOREIGN_KEY_INFO *f_key_info;
    List_iterator_fast<FOREIGN_KEY_INFO> it(f_key_list);
    while ((f_key_info= it++))
    {
3013
      LEX_STRING *f_info;
3014
      LEX_STRING *r_info;
3015 3016 3017 3018 3019
      List_iterator_fast<LEX_STRING> it(f_key_info->foreign_fields),
        it1(f_key_info->referenced_fields);
      uint f_idx= 0;
      while ((f_info= it++))
      {
3020
        r_info= it1++;
3021
        f_idx++;
3022
        restore_record(table, s->default_values);
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        store_key_column_usage(table, base_name, file_name,
                               f_key_info->forein_id->str,
                               f_key_info->forein_id->length,
                               f_info->str, f_info->length,
                               (longlong) f_idx);
        table->field[8]->store((longlong) f_idx);
        table->field[8]->set_notnull();
3030 3031 3032 3033 3034 3035 3036 3037 3038 3039 3040
        table->field[9]->store(f_key_info->referenced_db->str,
                               f_key_info->referenced_db->length,
                               system_charset_info);
        table->field[9]->set_notnull();
        table->field[10]->store(f_key_info->referenced_table->str,
                                f_key_info->referenced_table->length, 
                                system_charset_info);
        table->field[10]->set_notnull();
        table->field[11]->store(r_info->str, r_info->length,
                                system_charset_info);
        table->field[11]->set_notnull();
3041 3042
        if (schema_table_store_record(thd, table))
          DBUG_RETURN(1);
3043 3044 3045
      }
    }
  }
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  DBUG_RETURN(res);
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}


3050 3051 3052 3053 3054 3055 3056 3057 3058 3059 3060 3061
int fill_open_tables(THD *thd, TABLE_LIST *tables, COND *cond)
{
  DBUG_ENTER("fill_open_tables");
  const char *wild= thd->lex->wild ? thd->lex->wild->ptr() : NullS;
  TABLE *table= tables->table;
  CHARSET_INFO *cs= system_charset_info;
  OPEN_TABLE_LIST *open_list;
  if (!(open_list=list_open_tables(thd,wild)) && thd->is_fatal_error)
    DBUG_RETURN(1);

  for (; open_list ; open_list=open_list->next)
  {
3062
    restore_record(table, s->default_values);
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    table->field[0]->store(open_list->db, strlen(open_list->db), cs);
    table->field[1]->store(open_list->table, strlen(open_list->table), cs);
    table->field[2]->store((longlong) open_list->in_use);
    table->field[3]->store((longlong)  open_list->locked);
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    if (schema_table_store_record(thd, table))
      DBUG_RETURN(1);
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  }
  DBUG_RETURN(0);
}


int fill_variables(THD *thd, TABLE_LIST *tables, COND *cond)
{
  DBUG_ENTER("fill_variables");
3077
  int res= 0;
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  LEX *lex= thd->lex;
  const char *wild= lex->wild ? lex->wild->ptr() : NullS;
3080 3081 3082 3083
  pthread_mutex_lock(&LOCK_global_system_variables);
  res= show_status_array(thd, wild, init_vars, 
                         lex->option_type, 0, "", tables->table);
  pthread_mutex_unlock(&LOCK_global_system_variables);
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  DBUG_RETURN(res);
}


int fill_status(THD *thd, TABLE_LIST *tables, COND *cond)
{
  DBUG_ENTER("fill_status");
  LEX *lex= thd->lex;
  const char *wild= lex->wild ? lex->wild->ptr() : NullS;
  int res= 0;
  STATUS_VAR tmp;
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  ha_update_statistics();                    /* Export engines statistics */
  pthread_mutex_lock(&LOCK_status);
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  if (lex->option_type == OPT_GLOBAL)
    calc_sum_of_all_status(&tmp);
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  res= show_status_array(thd, wild, status_vars, OPT_GLOBAL,
                         (lex->option_type == OPT_GLOBAL ? 
                          &tmp: &thd->status_var), "",tables->table);
  pthread_mutex_unlock(&LOCK_status);
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  DBUG_RETURN(res);
}


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/*
  Find schema_tables elment by name

  SYNOPSIS
    find_schema_table()
    thd                 thread handler
    table_name          table name

  RETURN
    0	table not found
    #   pointer to 'shema_tables' element
*/

ST_SCHEMA_TABLE *find_schema_table(THD *thd, const char* table_name)
{
  ST_SCHEMA_TABLE *schema_table= schema_tables;
  for ( ; schema_table->table_name; schema_table++)
  {
    if (!my_strcasecmp(system_charset_info,
                       schema_table->table_name,
                       table_name))
      return schema_table;
  }
  return 0;
}


ST_SCHEMA_TABLE *get_schema_table(enum enum_schema_tables schema_table_idx)
{
  return &schema_tables[schema_table_idx];
}


/*
  Create information_schema table using schema_table data

  SYNOPSIS
    create_schema_table()
    thd	       	          thread handler
    schema_table          pointer to 'shema_tables' element

  RETURN
    #	                  Pointer to created table
    0	                  Can't create table
*/

3153
TABLE *create_schema_table(THD *thd, TABLE_LIST *table_list)
3154 3155 3156 3157 3158
{
  int field_count= 0;
  Item *item;
  TABLE *table;
  List<Item> field_list;
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  ST_SCHEMA_TABLE *schema_table= table_list->schema_table;
3160
  ST_FIELD_INFO *fields_info= schema_table->fields_info;
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  CHARSET_INFO *cs= system_charset_info;
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  DBUG_ENTER("create_schema_table");

  for ( ; fields_info->field_name; fields_info++)
  {
    switch (fields_info->field_type) {
    case MYSQL_TYPE_LONG:
      if (!(item= new Item_int(fields_info->field_name,
                               fields_info->value,
                               fields_info->field_length)))
      {
        DBUG_RETURN(0);
      }
      break;
    case MYSQL_TYPE_TIMESTAMP:
      if (!(item=new Item_datetime(fields_info->field_name)))
      {
        DBUG_RETURN(0);
      }
      break;
    default:
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      /* this should be changed when Item_empty_string is fixed(in 4.1) */
      if (!(item= new Item_empty_string("", 0, cs)))
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      {
        DBUG_RETURN(0);
      }
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      item->max_length= fields_info->field_length * cs->mbmaxlen;
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      item->set_name(fields_info->field_name,
                     strlen(fields_info->field_name), cs);
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      break;
    }
    field_list.push_back(item);
    item->maybe_null= fields_info->maybe_null;
    field_count++;
  }
  TMP_TABLE_PARAM *tmp_table_param =
    (TMP_TABLE_PARAM*) (thd->calloc(sizeof(TMP_TABLE_PARAM)));
  tmp_table_param->init();
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  tmp_table_param->table_charset= cs;
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  tmp_table_param->field_count= field_count;
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  tmp_table_param->schema_table= 1;
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  SELECT_LEX *select_lex= thd->lex->current_select;
  if (!(table= create_tmp_table(thd, tmp_table_param,
                                field_list, (ORDER*) 0, 0, 0, 
                                (select_lex->options | thd->options |
                                 TMP_TABLE_ALL_COLUMNS),
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                                HA_POS_ERROR, table_list->alias)))
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    DBUG_RETURN(0);
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  table_list->schema_table_param= tmp_table_param;
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  DBUG_RETURN(table);
}


/*
  For old SHOW compatibility. It is used when
  old SHOW doesn't have generated column names
  Make list of fields for SHOW

  SYNOPSIS
    make_old_format()
    thd			thread handler
    schema_table        pointer to 'schema_tables' element

  RETURN
   -1	errror
    0	success
*/

int make_old_format(THD *thd, ST_SCHEMA_TABLE *schema_table)
{
  ST_FIELD_INFO *field_info= schema_table->fields_info;
  for ( ; field_info->field_name; field_info++)
  {
    if (field_info->old_name)
    {
      Item_field *field= new Item_field(NullS, NullS, field_info->field_name);
      if (field)
      {
        field->set_name(field_info->old_name,
                        strlen(field_info->old_name),
                        system_charset_info);
        if (add_item_to_list(thd, field))
          return 1;
      }
    }
  }
  return 0;
}


int make_schemata_old_format(THD *thd, ST_SCHEMA_TABLE *schema_table)
{
  char tmp[128];
  LEX *lex= thd->lex;
  SELECT_LEX *sel= lex->current_select;

  if (!sel->item_list.elements)
  {
    ST_FIELD_INFO *field_info= &schema_table->fields_info[1];
    String buffer(tmp,sizeof(tmp), system_charset_info);
    Item_field *field= new Item_field(NullS, NullS, field_info->field_name);
    if (!field || add_item_to_list(thd, field))
      return 1;
    buffer.length(0);
    buffer.append(field_info->old_name);
    if (lex->wild && lex->wild->ptr())
    {
      buffer.append(" (");
      buffer.append(lex->wild->ptr());
      buffer.append(")");
    }
    field->set_name(buffer.ptr(), buffer.length(), system_charset_info);
  }
  return 0;
}


int make_table_names_old_format(THD *thd, ST_SCHEMA_TABLE *schema_table)
{
  char tmp[128];
  String buffer(tmp,sizeof(tmp), thd->charset());
  LEX *lex= thd->lex;

  ST_FIELD_INFO *field_info= &schema_table->fields_info[2];
  buffer.length(0);
  buffer.append(field_info->old_name);
  buffer.append(lex->select_lex.db);
  if (lex->wild && lex->wild->ptr())
  {
    buffer.append(" (");
    buffer.append(lex->wild->ptr());
    buffer.append(")");
  }
  Item_field *field= new Item_field(NullS, NullS, field_info->field_name);
  if (add_item_to_list(thd, field))
    return 1;
  field->set_name(buffer.ptr(), buffer.length(), system_charset_info);
  if (thd->lex->verbose)
  {
    field->set_name(buffer.ptr(), buffer.length(), system_charset_info);
    field_info= &schema_table->fields_info[3];
    field= new Item_field(NullS, NullS, field_info->field_name);
    if (add_item_to_list(thd, field))
      return 1;
    field->set_name(field_info->old_name, strlen(field_info->old_name),
                    system_charset_info);
  }
  return 0;
}


int make_columns_old_format(THD *thd, ST_SCHEMA_TABLE *schema_table)
{
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  int fields_arr[]= {3, 14, 13, 6, 15, 5, 16, 17, 18, -1};
  int *field_num= fields_arr;
  ST_FIELD_INFO *field_info;
  for (; *field_num >= 0; field_num++)
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  {
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    field_info= &schema_table->fields_info[*field_num];
    if (!thd->lex->verbose && (*field_num == 13 ||
                               *field_num == 17 ||
                               *field_num == 18))
      continue;
    Item_field *field= new Item_field(NullS, NullS, field_info->field_name);
    if (field)
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    {
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      field->set_name(field_info->old_name,
                      strlen(field_info->old_name),
                      system_charset_info);
      if (add_item_to_list(thd, field))
        return 1;
    }
  }
  return 0;
}


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int make_character_sets_old_format(THD *thd, ST_SCHEMA_TABLE *schema_table)
{
  int fields_arr[]= {0, 2, 1, 3, -1};
  int *field_num= fields_arr;
  ST_FIELD_INFO *field_info;
  for (; *field_num >= 0; field_num++)
  {
    field_info= &schema_table->fields_info[*field_num];
    Item_field *field= new Item_field(NullS, NullS, field_info->field_name);
    if (field)
    {
      field->set_name(field_info->old_name,
                      strlen(field_info->old_name),
                      system_charset_info);
      if (add_item_to_list(thd, field))
        return 1;
    }
  }
  return 0;
}


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int make_proc_old_format(THD *thd, ST_SCHEMA_TABLE *schema_table)
{
  int fields_arr[]= {2, 3, 4, 19, 16, 15, 14, 18, -1};
  int *field_num= fields_arr;
  ST_FIELD_INFO *field_info;
  for (; *field_num >= 0; field_num++)
  {
    field_info= &schema_table->fields_info[*field_num];
    Item_field *field= new Item_field(NullS, NullS, field_info->field_name);
    if (field)
    {
      field->set_name(field_info->old_name,
                      strlen(field_info->old_name),
                      system_charset_info);
      if (add_item_to_list(thd, field))
        return 1;
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    }
  }
  return 0;
}


/*
  Create information_schema table

  SYNOPSIS
  mysql_schema_table()
    thd                thread handler
    lex                pointer to LEX
    table_list         pointer to table_list

  RETURN
    0	success
    1   error
*/

int mysql_schema_table(THD *thd, LEX *lex, TABLE_LIST *table_list)
{
  TABLE *table;
  DBUG_ENTER("mysql_schema_table");
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  if (!(table= table_list->schema_table->create_table(thd, table_list)))
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  {
    DBUG_RETURN(1);
  }
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  table->s->tmp_table= TMP_TABLE;
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  table->grant.privilege= SELECT_ACL;
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  /*
    This test is necessary to make
    case insensitive file systems +
    upper case table names(information schema tables) +
    views
    working correctly
  */
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  if (table_list->schema_table_name)
    table->alias_name_used= my_strcasecmp(table_alias_charset,
                                          table_list->schema_table_name,
                                          table_list->alias);
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  table_list->table_name= (char*) table->s->table_name;
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  table_list->table_name_length= strlen(table->s->table_name);
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  table_list->table= table;
  table->next= thd->derived_tables;
  thd->derived_tables= table;
  table_list->select_lex->options |= OPTION_SCHEMA_TABLE;
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  lex->safe_to_cache_query= 0;
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  if (table_list->schema_table_reformed) // show command
  {
    SELECT_LEX *sel= lex->current_select;
    uint i= 0;
    Item *item;
    Field_translator *transl;

    if (table_list->field_translation)
    {
      Field_translator *end= table_list->field_translation +
        sel->item_list.elements;
      for (transl= table_list->field_translation; transl < end; transl++)
      {
        if (!transl->item->fixed &&
            transl->item->fix_fields(thd, table_list, &transl->item))
          DBUG_RETURN(1);
      }
      DBUG_RETURN(0);
    }
    List_iterator_fast<Item> it(sel->item_list);
    if (!(transl=
          (Field_translator*)(thd->current_arena->
                              alloc(sel->item_list.elements *
                                    sizeof(Field_translator)))))
    {
      DBUG_RETURN(1);
    }
    while ((item= it++))
    {
      char *name= item->name;
      transl[i].item= item;
      if (!item->fixed && item->fix_fields(thd, table_list, &transl[i].item))
        DBUG_RETURN(1);
      transl[i++].name= name;
    }
    table_list->field_translation= transl;
  }

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  DBUG_RETURN(0);
}


/*
  Generate select from information_schema table

  SYNOPSIS
    make_schema_select()
    thd                  thread handler
    sel                  pointer to SELECT_LEX
    schema_table_idx     index of 'schema_tables' element

  RETURN
    0	success
    1   error
*/

int make_schema_select(THD *thd, SELECT_LEX *sel,
		       enum enum_schema_tables schema_table_idx)
{
  ST_SCHEMA_TABLE *schema_table= get_schema_table(schema_table_idx);
  LEX_STRING db, table;
  DBUG_ENTER("mysql_schema_select");
  /* 
     We have to make non const db_name & table_name
     because of lower_case_table_names
  */
  make_lex_string(thd, &db, information_schema_name.str,
                  information_schema_name.length, 0);
  make_lex_string(thd, &table, schema_table->table_name,
                  strlen(schema_table->table_name), 0);
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  if (schema_table->old_format(thd, schema_table) ||      /* Handle old syntax */
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      !sel->add_table_to_list(thd, new Table_ident(thd, db, table, 0),
                              0, 0, TL_READ, (List<String> *) 0,
                              (List<String> *) 0))
  {
    DBUG_RETURN(1);
  }
  DBUG_RETURN(0);
}


/*
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  Fill temporary schema tables before SELECT
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  SYNOPSIS
    get_schema_tables_result()
    join  join which use schema tables

  RETURN
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    FALSE success
    TRUE  error
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*/

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bool get_schema_tables_result(JOIN *join)
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{
  JOIN_TAB *tmp_join_tab= join->join_tab+join->tables;
  THD *thd= join->thd;
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  LEX *lex= thd->lex;
  bool result= 0;
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  DBUG_ENTER("get_schema_tables_result");

  thd->no_warnings_for_error= 1;
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  for (JOIN_TAB *tab= join->join_tab; tab < tmp_join_tab; tab++)
  {  
    if (!tab->table || !tab->table->pos_in_table_list)
      break;
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    TABLE_LIST *table_list= tab->table->pos_in_table_list;
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    if (table_list->schema_table && thd->fill_derived_tables())
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    {
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      TABLE_LIST **query_tables_last= lex->query_tables_last;
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      TABLE *old_derived_tables= thd->derived_tables;
      MYSQL_LOCK *sql_lock= thd->lock;
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      lex->sql_command= SQLCOM_SHOW_FIELDS;
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      DBUG_ASSERT(!*query_tables_last);
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      if (&lex->unit != lex->current_select->master_unit()) // is subselect
      {
        table_list->table->file->extra(HA_EXTRA_RESET_STATE);
        table_list->table->file->delete_all_rows();
        free_io_cache(table_list->table);
        filesort_free_buffers(table_list->table);
      }
      else
        table_list->table->file->records= 0;

      thd->derived_tables= 0;
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      thd->lock=0;
      if (table_list->schema_table->fill_table(thd, table_list,
                                               tab->select_cond))
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        result= 1;
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      thd->lock= sql_lock;
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      lex->sql_command= SQLCOM_SELECT;
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      thd->derived_tables= old_derived_tables;
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      lex->query_tables_last= query_tables_last;
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      *query_tables_last= 0;
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    }
  }
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  thd->no_warnings_for_error= 0;
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  DBUG_RETURN(result);
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}


ST_FIELD_INFO schema_fields_info[]=
{
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  {"CATALOG_NAME", FN_REFLEN, MYSQL_TYPE_STRING, 0, 1, 0},
  {"SCHEMA_NAME", NAME_LEN, MYSQL_TYPE_STRING, 0, 0, "Database"},
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  {"DEFAULT_CHARACTER_SET_NAME", 64, MYSQL_TYPE_STRING, 0, 0, 0},
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  {"DEFAULT_COLLATION_NAME", 64, MYSQL_TYPE_STRING, 0, 0, 0},
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  {"SQL_PATH", FN_REFLEN, MYSQL_TYPE_STRING, 0, 1, 0},
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  {0, 0, MYSQL_TYPE_STRING, 0, 0, 0}
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};


ST_FIELD_INFO tables_fields_info[]=
{
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  {"TABLE_CATALOG", FN_REFLEN, MYSQL_TYPE_STRING, 0, 1, 0},
  {"TABLE_SCHEMA",NAME_LEN, MYSQL_TYPE_STRING, 0, 0, 0},
  {"TABLE_NAME", NAME_LEN, MYSQL_TYPE_STRING, 0, 0, "Name"},
  {"TABLE_TYPE", NAME_LEN, MYSQL_TYPE_STRING, 0, 0, 0},
  {"ENGINE", NAME_LEN, MYSQL_TYPE_STRING, 0, 1, "Engine"},
  {"VERSION", 21 , MYSQL_TYPE_LONG, 0, 1, "Version"},
  {"ROW_FORMAT", 10, MYSQL_TYPE_STRING, 0, 1, "Row_format"},
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  {"TABLE_ROWS", 21 , MYSQL_TYPE_LONG, 0, 1, "Rows"},
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  {"AVG_ROW_LENGTH", 21 , MYSQL_TYPE_LONG, 0, 1, "Avg_row_length"},
  {"DATA_LENGTH", 21 , MYSQL_TYPE_LONG, 0, 1, "Data_length"},
  {"MAX_DATA_LENGTH", 21 , MYSQL_TYPE_LONG, 0, 1, "Max_data_length"},
  {"INDEX_LENGTH", 21 , MYSQL_TYPE_LONG, 0, 1, "Index_length"},
  {"DATA_FREE", 21 , MYSQL_TYPE_LONG, 0, 1, "Data_free"},
  {"AUTO_INCREMENT", 21 , MYSQL_TYPE_LONG, 0, 1, "Auto_increment"},
  {"CREATE_TIME", 0, MYSQL_TYPE_TIMESTAMP, 0, 1, "Create_time"},
  {"UPDATE_TIME", 0, MYSQL_TYPE_TIMESTAMP, 0, 1, "Update_time"},
  {"CHECK_TIME", 0, MYSQL_TYPE_TIMESTAMP, 0, 1, "Check_time"},
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  {"TABLE_COLLATION", 64, MYSQL_TYPE_STRING, 0, 1, "Collation"},
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  {"CHECKSUM", 21 , MYSQL_TYPE_LONG, 0, 1, "Checksum"},
  {"CREATE_OPTIONS", 255, MYSQL_TYPE_STRING, 0, 1, "Create_options"},
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  {"TABLE_COMMENT", 80, MYSQL_TYPE_STRING, 0, 0, "Comment"},
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  {0, 0, MYSQL_TYPE_STRING, 0, 0, 0}
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};


ST_FIELD_INFO columns_fields_info[]=
{
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  {"TABLE_CATALOG", FN_REFLEN, MYSQL_TYPE_STRING, 0, 1, 0},
  {"TABLE_SCHEMA", NAME_LEN, MYSQL_TYPE_STRING, 0, 0, 0},
  {"TABLE_NAME", NAME_LEN, MYSQL_TYPE_STRING, 0, 0, 0},
  {"COLUMN_NAME", NAME_LEN, MYSQL_TYPE_STRING, 0, 0, "Field"},
  {"ORDINAL_POSITION", 21 , MYSQL_TYPE_LONG, 0, 0, 0},
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  {"COLUMN_DEFAULT", NAME_LEN, MYSQL_TYPE_STRING, 0, 1, "Default"},
  {"IS_NULLABLE", 3, MYSQL_TYPE_STRING, 0, 0, "Null"},
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  {"DATA_TYPE", NAME_LEN, MYSQL_TYPE_STRING, 0, 0, 0},
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  {"CHARACTER_MAXIMUM_LENGTH", 21 , MYSQL_TYPE_LONG, 0, 1, 0},
  {"CHARACTER_OCTET_LENGTH", 21 , MYSQL_TYPE_LONG, 0, 1, 0},
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  {"NUMERIC_PRECISION", 21 , MYSQL_TYPE_LONG, 0, 1, 0},
  {"NUMERIC_SCALE", 21 , MYSQL_TYPE_LONG, 0, 1, 0},
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  {"CHARACTER_SET_NAME", 64, MYSQL_TYPE_STRING, 0, 1, 0},
  {"COLLATION_NAME", 64, MYSQL_TYPE_STRING, 0, 1, "Collation"},
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  {"COLUMN_TYPE", 65535, MYSQL_TYPE_STRING, 0, 0, "Type"},
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  {"COLUMN_KEY", 3, MYSQL_TYPE_STRING, 0, 0, "Key"},
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  {"EXTRA", 20, MYSQL_TYPE_STRING, 0, 0, "Extra"},
  {"PRIVILEGES", 80, MYSQL_TYPE_STRING, 0, 0, "Privileges"},
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  {"COLUMN_COMMENT", 255, MYSQL_TYPE_STRING, 0, 0, "Comment"},
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  {0, 0, MYSQL_TYPE_STRING, 0, 0, 0}
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};


ST_FIELD_INFO charsets_fields_info[]=
{
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  {"CHARACTER_SET_NAME", 64, MYSQL_TYPE_STRING, 0, 0, "Charset"},
  {"DEFAULT_COLLATE_NAME", 64, MYSQL_TYPE_STRING, 0, 0, "Default collation"},
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  {"DESCRIPTION", 60, MYSQL_TYPE_STRING, 0, 0, "Description"},
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  {"MAXLEN", 3 ,MYSQL_TYPE_LONG, 0, 0, "Maxlen"},
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  {0, 0, MYSQL_TYPE_STRING, 0, 0, 0}
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};


ST_FIELD_INFO collation_fields_info[]=
{
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  {"COLLATION_NAME", 64, MYSQL_TYPE_STRING, 0, 0, "Collation"},
  {"CHARACTER_SET_NAME", 64, MYSQL_TYPE_STRING, 0, 0, "Charset"},
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  {"ID", 11, MYSQL_TYPE_LONG, 0, 0, "Id"},
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  {"IS_DEFAULT", 3, MYSQL_TYPE_STRING, 0, 0, "Default"},
  {"IS_COMPILED", 3, MYSQL_TYPE_STRING, 0, 0, "Compiled"},
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  {"SORTLEN", 3 ,MYSQL_TYPE_LONG, 0, 0, "Sortlen"},
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  {0, 0, MYSQL_TYPE_STRING, 0, 0, 0}
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};


ST_FIELD_INFO coll_charset_app_fields_info[]=
{
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  {"COLLATION_NAME", 64, MYSQL_TYPE_STRING, 0, 0, 0},
  {"CHARACTER_SET_NAME", 64, MYSQL_TYPE_STRING, 0, 0, 0},
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  {0, 0, MYSQL_TYPE_STRING, 0, 0, 0}
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};


ST_FIELD_INFO proc_fields_info[]=
{
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  {"SPECIFIC_NAME", NAME_LEN, MYSQL_TYPE_STRING, 0, 0, 0},
  {"ROUTINE_CATALOG", FN_REFLEN, MYSQL_TYPE_STRING, 0, 1, 0},
  {"ROUTINE_SCHEMA", NAME_LEN, MYSQL_TYPE_STRING, 0, 0, "Db"},
  {"ROUTINE_NAME", NAME_LEN, MYSQL_TYPE_STRING, 0, 0, "Name"},
  {"ROUTINE_TYPE", 9, MYSQL_TYPE_STRING, 0, 0, "Type"},
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  {"DTD_IDENTIFIER", NAME_LEN, MYSQL_TYPE_STRING, 0, 1, 0},
  {"ROUTINE_BODY", 8, MYSQL_TYPE_STRING, 0, 0, 0},
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  {"ROUTINE_DEFINITION", 65535, MYSQL_TYPE_STRING, 0, 0, 0},
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  {"EXTERNAL_NAME", NAME_LEN, MYSQL_TYPE_STRING, 0, 1, 0},
  {"EXTERNAL_LANGUAGE", NAME_LEN, MYSQL_TYPE_STRING, 0, 1, 0},
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  {"PARAMETER_STYLE", 8, MYSQL_TYPE_STRING, 0, 0, 0},
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  {"IS_DETERMINISTIC", 3, MYSQL_TYPE_STRING, 0, 0, 0},
  {"SQL_DATA_ACCESS", NAME_LEN, MYSQL_TYPE_STRING, 0, 0, 0},
  {"SQL_PATH", NAME_LEN, MYSQL_TYPE_STRING, 0, 1, 0},
  {"SECURITY_TYPE", 7, MYSQL_TYPE_STRING, 0, 0, "Security_type"},
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  {"CREATED", 0, MYSQL_TYPE_TIMESTAMP, 0, 0, "Created"},
  {"LAST_ALTERED", 0, MYSQL_TYPE_TIMESTAMP, 0, 0, "Modified"},
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  {"SQL_MODE", 65535, MYSQL_TYPE_STRING, 0, 0, 0},
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  {"ROUTINE_COMMENT", NAME_LEN, MYSQL_TYPE_STRING, 0, 0, "Comment"},
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  {"DEFINER", 77, MYSQL_TYPE_STRING, 0, 0, "Definer"},
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  {0, 0, MYSQL_TYPE_STRING, 0, 0, 0}
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};


ST_FIELD_INFO stat_fields_info[]=
{
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  {"TABLE_CATALOG", FN_REFLEN, MYSQL_TYPE_STRING, 0, 1, 0},
  {"TABLE_SCHEMA", NAME_LEN, MYSQL_TYPE_STRING, 0, 0, 0},
  {"TABLE_NAME", NAME_LEN, MYSQL_TYPE_STRING, 0, 0, "Table"},
  {"NON_UNIQUE", 1, MYSQL_TYPE_LONG, 0, 0, "Non_unique"},
  {"INDEX_SCHEMA", NAME_LEN, MYSQL_TYPE_STRING, 0, 0, 0},
  {"INDEX_NAME", NAME_LEN, MYSQL_TYPE_STRING, 0, 0, "Key_name"},
  {"SEQ_IN_INDEX", 2, MYSQL_TYPE_LONG, 0, 0, "Seq_in_index"},
  {"COLUMN_NAME", NAME_LEN, MYSQL_TYPE_STRING, 0, 0, "Column_name"},
  {"COLLATION", 1, MYSQL_TYPE_STRING, 0, 1, "Collation"},
  {"CARDINALITY", 21, MYSQL_TYPE_LONG, 0, 1, "Cardinality"},
  {"SUB_PART", 3, MYSQL_TYPE_LONG, 0, 1, "Sub_part"},
  {"PACKED", 10, MYSQL_TYPE_STRING, 0, 1, "Packed"},
  {"NULLABLE", 3, MYSQL_TYPE_STRING, 0, 0, "Null"},
  {"INDEX_TYPE", 16, MYSQL_TYPE_STRING, 0, 0, "Index_type"},
  {"COMMENT", 16, MYSQL_TYPE_STRING, 0, 1, "Comment"},
  {0, 0, MYSQL_TYPE_STRING, 0, 0, 0}
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};


ST_FIELD_INFO view_fields_info[]=
{
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  {"TABLE_CATALOG", FN_REFLEN, MYSQL_TYPE_STRING, 0, 1, 0},
  {"TABLE_SCHEMA", NAME_LEN, MYSQL_TYPE_STRING, 0, 0, 0},
  {"TABLE_NAME", NAME_LEN, MYSQL_TYPE_STRING, 0, 0, 0},
  {"VIEW_DEFINITION", 65535, MYSQL_TYPE_STRING, 0, 0, 0},
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  {"CHECK_OPTION", 8, MYSQL_TYPE_STRING, 0, 0, 0},
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  {"IS_UPDATABLE", 3, MYSQL_TYPE_STRING, 0, 0, 0},
  {0, 0, MYSQL_TYPE_STRING, 0, 0, 0}
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};


ST_FIELD_INFO user_privileges_fields_info[]=
{
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  {"GRANTEE", 81, MYSQL_TYPE_STRING, 0, 0, 0},
  {"TABLE_CATALOG", FN_REFLEN, MYSQL_TYPE_STRING, 0, 1, 0},
  {"PRIVILEGE_TYPE", NAME_LEN, MYSQL_TYPE_STRING, 0, 0, 0},
  {"IS_GRANTABLE", 3, MYSQL_TYPE_STRING, 0, 0, 0},
  {0, 0, MYSQL_TYPE_STRING, 0, 0, 0}
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};


ST_FIELD_INFO schema_privileges_fields_info[]=
{
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  {"GRANTEE", 81, MYSQL_TYPE_STRING, 0, 0, 0},
  {"TABLE_CATALOG", FN_REFLEN, MYSQL_TYPE_STRING, 0, 1, 0},
  {"TABLE_SCHEMA", NAME_LEN, MYSQL_TYPE_STRING, 0, 0, 0},
  {"PRIVILEGE_TYPE", NAME_LEN, MYSQL_TYPE_STRING, 0, 0, 0},
  {"IS_GRANTABLE", 3, MYSQL_TYPE_STRING, 0, 0, 0},
  {0, 0, MYSQL_TYPE_STRING, 0, 0, 0}
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};


ST_FIELD_INFO table_privileges_fields_info[]=
{
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  {"GRANTEE", 81, MYSQL_TYPE_STRING, 0, 0, 0},
  {"TABLE_CATALOG", FN_REFLEN, MYSQL_TYPE_STRING, 0, 1, 0},
  {"TABLE_SCHEMA", NAME_LEN, MYSQL_TYPE_STRING, 0, 0, 0},
  {"TABLE_NAME", NAME_LEN, MYSQL_TYPE_STRING, 0, 0, 0},
  {"PRIVILEGE_TYPE", NAME_LEN, MYSQL_TYPE_STRING, 0, 0, 0},
  {"IS_GRANTABLE", 3, MYSQL_TYPE_STRING, 0, 0, 0},
  {0, 0, MYSQL_TYPE_STRING, 0, 0, 0}
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};


ST_FIELD_INFO column_privileges_fields_info[]=
{
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  {"GRANTEE", 81, MYSQL_TYPE_STRING, 0, 0, 0},
  {"TABLE_CATALOG", FN_REFLEN, MYSQL_TYPE_STRING, 0, 1, 0},
  {"TABLE_SCHEMA", NAME_LEN, MYSQL_TYPE_STRING, 0, 0, 0},
  {"TABLE_NAME", NAME_LEN, MYSQL_TYPE_STRING, 0, 0, 0},
  {"COLUMN_NAME", NAME_LEN, MYSQL_TYPE_STRING, 0, 0, 0},
  {"PRIVILEGE_TYPE", NAME_LEN, MYSQL_TYPE_STRING, 0, 0, 0},
  {"IS_GRANTABLE", 3, MYSQL_TYPE_STRING, 0, 0, 0},
  {0, 0, MYSQL_TYPE_STRING, 0, 0, 0}
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};


ST_FIELD_INFO table_constraints_fields_info[]=
{
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  {"CONSTRAINT_CATALOG", FN_REFLEN, MYSQL_TYPE_STRING, 0, 1, 0},
  {"CONSTRAINT_SCHEMA", NAME_LEN, MYSQL_TYPE_STRING, 0, 0, 0},
  {"CONSTRAINT_NAME", NAME_LEN, MYSQL_TYPE_STRING, 0, 0, 0},
  {"TABLE_SCHEMA", NAME_LEN, MYSQL_TYPE_STRING, 0, 0, 0},
  {"TABLE_NAME", NAME_LEN, MYSQL_TYPE_STRING, 0, 0, 0},
  {"CONSTRAINT_TYPE", NAME_LEN, MYSQL_TYPE_STRING, 0, 0, 0},
  {0, 0, MYSQL_TYPE_STRING, 0, 0, 0}
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};


ST_FIELD_INFO key_column_usage_fields_info[]=
{
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  {"CONSTRAINT_CATALOG", FN_REFLEN, MYSQL_TYPE_STRING, 0, 1, 0},
  {"CONSTRAINT_SCHEMA", NAME_LEN, MYSQL_TYPE_STRING, 0, 0, 0},
  {"CONSTRAINT_NAME", NAME_LEN, MYSQL_TYPE_STRING, 0, 0, 0},
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  {"TABLE_CATALOG", FN_REFLEN, MYSQL_TYPE_STRING, 0, 1, 0},
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  {"TABLE_SCHEMA", NAME_LEN, MYSQL_TYPE_STRING, 0, 0, 0},
  {"TABLE_NAME", NAME_LEN, MYSQL_TYPE_STRING, 0, 0, 0},
  {"COLUMN_NAME", NAME_LEN, MYSQL_TYPE_STRING, 0, 0, 0},
  {"ORDINAL_POSITION", 10 ,MYSQL_TYPE_LONG, 0, 0, 0},
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  {"POSITION_IN_UNIQUE_CONSTRAINT", 10 ,MYSQL_TYPE_LONG, 0, 1, 0},
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  {"REFERENCED_TABLE_SCHEMA", NAME_LEN, MYSQL_TYPE_STRING, 0, 1, 0},
  {"REFERENCED_TABLE_NAME", NAME_LEN, MYSQL_TYPE_STRING, 0, 1, 0},
  {"REFERENCED_COLUMN_NAME", NAME_LEN, MYSQL_TYPE_STRING, 0, 1, 0},
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  {0, 0, MYSQL_TYPE_STRING, 0, 0, 0}
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};


ST_FIELD_INFO table_names_fields_info[]=
{
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  {"TABLE_CATALOG", FN_REFLEN, MYSQL_TYPE_STRING, 0, 1, 0},
  {"TABLE_SCHEMA",NAME_LEN, MYSQL_TYPE_STRING, 0, 0, 0},
  {"TABLE_NAME", NAME_LEN, MYSQL_TYPE_STRING, 0, 0, "Tables_in_"},
  {"TABLE_TYPE", NAME_LEN, MYSQL_TYPE_STRING, 0, 0, "Table_type"},
  {0, 0, MYSQL_TYPE_STRING, 0, 0, 0}
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};


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ST_FIELD_INFO open_tables_fields_info[]=
{
  {"Database", NAME_LEN, MYSQL_TYPE_STRING, 0, 0, "Database"},
  {"Table",NAME_LEN, MYSQL_TYPE_STRING, 0, 0, "Table"},
  {"In_use", 1, MYSQL_TYPE_LONG, 0, 0, "In_use"},
  {"Name_locked", 4, MYSQL_TYPE_LONG, 0, 0, "Name_locked"},
  {0, 0, MYSQL_TYPE_STRING, 0, 0, 0}
};


ST_FIELD_INFO variables_fields_info[]=
{
  {"Variable_name", 80, MYSQL_TYPE_STRING, 0, 0, "Variable_name"},
  {"Value", 255, MYSQL_TYPE_STRING, 0, 0, "Value"},
  {0, 0, MYSQL_TYPE_STRING, 0, 0, 0}
};


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/*
  Description of ST_FIELD_INFO in table.h
*/

ST_SCHEMA_TABLE schema_tables[]=
{
  {"SCHEMATA", schema_fields_info, create_schema_table,
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   fill_schema_shemata, make_schemata_old_format, 0, 1, -1, 0},
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  {"TABLES", tables_fields_info, create_schema_table, 
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   get_all_tables, make_old_format, get_schema_tables_record, 1, 2, 0},
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  {"COLUMNS", columns_fields_info, create_schema_table, 
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   get_all_tables, make_columns_old_format, get_schema_column_record, 1, 2, 0},
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  {"CHARACTER_SETS", charsets_fields_info, create_schema_table, 
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   fill_schema_charsets, make_character_sets_old_format, 0, -1, -1, 0},
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  {"COLLATIONS", collation_fields_info, create_schema_table, 
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   fill_schema_collation, make_old_format, 0, -1, -1, 0},
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  {"COLLATION_CHARACTER_SET_APPLICABILITY", coll_charset_app_fields_info,
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   create_schema_table, fill_schema_coll_charset_app, 0, 0, -1, -1, 0},
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  {"ROUTINES", proc_fields_info, create_schema_table, 
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    fill_schema_proc, make_proc_old_format, 0, -1, -1, 0},
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  {"STATISTICS", stat_fields_info, create_schema_table, 
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    get_all_tables, make_old_format, get_schema_stat_record, 1, 2, 0},
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  {"VIEWS", view_fields_info, create_schema_table, 
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    get_all_tables, 0, get_schema_views_record, 1, 2, 0},
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  {"USER_PRIVILEGES", user_privileges_fields_info, create_schema_table, 
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    fill_schema_user_privileges, 0, 0, -1, -1, 0},
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  {"SCHEMA_PRIVILEGES", schema_privileges_fields_info, create_schema_table,
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    fill_schema_schema_privileges, 0, 0, -1, -1, 0},
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  {"TABLE_PRIVILEGES", table_privileges_fields_info, create_schema_table,
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    fill_schema_table_privileges, 0, 0, -1, -1, 0},
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  {"COLUMN_PRIVILEGES", column_privileges_fields_info, create_schema_table,
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    fill_schema_column_privileges, 0, 0, -1, -1, 0},
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  {"TABLE_CONSTRAINTS", table_constraints_fields_info, create_schema_table,
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    get_all_tables, 0, get_schema_constraints_record, 3, 4, 0},
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  {"KEY_COLUMN_USAGE", key_column_usage_fields_info, create_schema_table,
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    get_all_tables, 0, get_schema_key_column_usage_record, 4, 5, 0},
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  {"TABLE_NAMES", table_names_fields_info, create_schema_table,
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   get_all_tables, make_table_names_old_format, 0, 1, 2, 1},
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  {"OPEN_TABLES", open_tables_fields_info, create_schema_table,
   fill_open_tables, make_old_format, 0, -1, -1, 1},
  {"STATUS", variables_fields_info, create_schema_table, fill_status, 
   make_old_format, 0, -1, -1, 1},
  {"VARIABLES", variables_fields_info, create_schema_table, fill_variables,
   make_old_format, 0, -1, -1, 1},
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  {0, 0, 0, 0, 0, 0, 0, 0, 0}
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};


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#ifdef __GNUC__
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template class List_iterator_fast<char>;
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template class List<char>;
#endif