sql_error.cc, sql_prepare.cc:

  new file

  Client-server protocol 4.1 changes - Server side:

 * Enhanced metadata information:
    - SHOW [COUNT(*)] ERRORS [LIMIT [offset,] rows]
    - SHOW [COUNT(*)] WARNING [LIMIT [offset,] rows]
    - SHOW TABLE TYPES
    - SHOW PRIVILEGES
    - SHOW COLUMN TYPES (Not fully implemented)

 * Prepared execution
 * Long data handling in pieces
 * And other misc changes

sql/Makefile.am

@@ -67,6 +67,7 @@ mysqld_SOURCES =	sql_lex.cc sql_handler.cc \
 			mysqld.cc password.c hash_filo.cc hostname.cc \
 			convert.cc sql_parse.cc sql_yacc.yy \
 			sql_base.cc table.cc sql_select.cc sql_insert.cc \
+                        sql_prepare.cc sql_error.cc \
 			sql_update.cc sql_delete.cc uniques.cc sql_do.cc \
 			procedure.cc item_uniq.cc sql_test.cc \
 			log.cc log_event.cc init.cc derror.cc sql_acl.cc \

sql/field.cc

@@ -279,8 +279,10 @@ void Field_num::add_zerofill_and_unsigned(String &res) const
 
 void Field_num::make_field(Send_field *field)
 {
+  field->db_name=table->table_cache_key ? table->table_cache_key : ""; 
+  field->org_table_name=table->real_name;
   field->table_name=table_name;
-  field->col_name=field_name;
+  field->col_name=field->org_col_name=field_name;
   field->length=field_length;
   field->type=type();
   field->flags=table->maybe_null ? (flags & ~NOT_NULL_FLAG) : flags;
@@ -290,8 +292,10 @@ void Field_num::make_field(Send_field *field)
 
 void Field_str::make_field(Send_field *field)
 {
+  field->db_name=table->table_cache_key ? table->table_cache_key : ""; 
+  field->org_table_name=table->real_name;
   field->table_name=table_name;
-  field->col_name=field_name;
+  field->col_name=field->org_col_name=field_name;
   field->length=field_length;
   field->type=type();
   field->flags=table->maybe_null ? (flags & ~NOT_NULL_FLAG) : flags;

sql/field.h

@@ -1038,7 +1038,9 @@ public:
 
 class Send_field {
  public:
-  const char *table_name,*col_name;
+  const char *db_name;
+  const char *table_name,*org_table_name;
+  const char *col_name,*org_col_name;
   uint length,flags,decimals;
   enum_field_types type;
   Send_field() {}

sql/item.cc

@@ -287,6 +287,140 @@ String *Item_null::val_str(String *str)
 { null_value=1; return 0;}
 
 
+/* Item_param related */
+void Item_param::set_null()
+{ 
+  maybe_null=null_value=1;    
+}
+
+void Item_param::set_int(longlong i)
+{  
+  int_value=(longlong)i; 
+  item_result_type = INT_RESULT;
+  item_type = INT_ITEM;
+}
+
+void Item_param::set_double(double i)
+{  
+  double value = (double)i;
+  real_value=value;
+  item_result_type = REAL_RESULT;
+  item_type = REAL_ITEM;
+}
+
+void Item_param::set_double(float i)
+{  
+  float value = (float)i;
+  real_value=(double)value;
+  item_result_type = REAL_RESULT;
+  item_type = REAL_ITEM;
+}
+
+void Item_param::set_value(const char *str, uint length)
+{  
+  str_value.set(str,length,default_charset_info);  
+  item_result_type = STRING_RESULT;
+  item_type = STRING_ITEM;
+}
+
+void Item_param::set_longdata(const char *str, ulong length)
+{
+  /* TODO: Fix this for binary handling by making use of 
+     buffer_type.. 
+  */  
+  str_value.append(str,length);    
+}
+
+void Item_param::set_long_end() 
+{ 
+  long_data_supplied = true; 
+  item_result_type = STRING_RESULT;
+};
+
+bool Item_param::save_in_field(Field *field)
+{
+  if (null_value)
+    return set_field_to_null(field);   
+    
+  field->set_notnull();
+  if (item_result_type == INT_RESULT)
+  {
+    longlong nr=val_int();
+    field->store(nr);
+    return 0;
+  }
+  if (item_result_type == REAL_RESULT)
+  {
+    double nr=val();    
+    field->store(nr);   
+    return 0;
+  }
+  String *result;
+  CHARSET_INFO *cs=default_charset_info;//fix this
+  result=val_str(&str_value);
+  field->store(result->ptr(),result->length(),cs);
+  return 0;
+}
+
+void Item_param::make_field(Send_field *tmp_field)
+{
+  init_make_field(tmp_field,FIELD_TYPE_STRING);
+}
+
+double Item_param::val() 
+{
+  /* Cross check whether we need need this conversions ? or direct 
+     return(real_value) is enough ?
+  */
+
+  switch(item_result_type) {
+  
+  case STRING_RESULT:
+    return (double)atof(str_value.ptr()); 
+  case INT_RESULT:
+    return (double)int_value;
+  default:
+    return real_value;
+  }
+} 
+
+longlong Item_param::val_int() 
+{ 
+  /* Cross check whether we need need this conversions ? or direct 
+     return(int_value) is enough ?
+  */
+  
+ switch(item_result_type) {
+
+  case STRING_RESULT:
+    return (longlong)strtoll(str_value.ptr(),(char**) 0,10);
+  case REAL_RESULT:
+    return (longlong) (real_value+(real_value > 0 ? 0.5 : -0.5));
+  default:
+    return int_value;
+  }
+}
+
+String *Item_param::val_str(String* str) 
+{ 
+  /* Cross check whether we need need this conversions ? or direct 
+     return(&str_value) is enough ?
+  */
+  
+  switch(item_result_type) {
+  
+  case INT_RESULT:
+    str->set(int_value);
+    return str;
+  case REAL_RESULT:
+    str->set(real_value);
+    return str;
+  default:
+    return (String*) &str_value;
+  }
+}
+/* End of Item_param related */
+
 void Item_copy_string::copy()
 {
   String *res=item->val_str(&str_value);
@@ -373,7 +507,10 @@ bool Item_field::fix_fields(THD *thd,TABLE_LIST *tables)
 
 void Item::init_make_field(Send_field *tmp_field,
 			   enum enum_field_types field_type)
-{
+{  
+  tmp_field->db_name=(char*) "";
+  tmp_field->org_table_name=(char*) "";
+  tmp_field->org_col_name=(char*) "";
   tmp_field->table_name=(char*) "";
   tmp_field->col_name=name;
   tmp_field->flags=maybe_null ? 0 : NOT_NULL_FLAG;

sql/item.h

@@ -155,6 +155,40 @@ public:
   bool is_null() { return 1; }
 };
 
+class Item_param :public Item
+{
+public:    
+  longlong int_value;
+  double   real_value;
+  enum Item_result item_result_type;
+  enum Type item_type;
+  enum enum_field_types buffer_type;
+  my_bool long_data_supplied;
+
+  Item_param(char *name_par=0){ 
+    name= name_par ? name_par : (char*) "?";
+    long_data_supplied = false;
+    item_type = STRING_ITEM; item_result_type = STRING_RESULT;
+  }
+  enum Type type() const { return item_type; }
+  double val();
+  longlong val_int();
+  String *val_str(String*);
+  void make_field(Send_field *field);
+  bool save_in_field(Field *field);
+  void set_null();
+  void set_int(longlong i);
+  void set_double(float i);
+  void set_double(double i);
+  void set_value(const char *str, uint length);  
+  void set_long_str(const char *str, ulong length);
+  void set_long_binary(const char *str, ulong length);
+  void set_longdata(const char *str, ulong length);
+  void set_long_end(); 
+  enum Item_result result_type () const
+  { return item_result_type; }  
+  Item *new_item() { return new Item_param(name); }
+};
 
 class Item_int :public Item
 {

sql/item_sum.cc

@@ -60,8 +60,9 @@ void Item_sum::make_field(Send_field *tmp_field)
 		     result_type() == REAL_RESULT ? FIELD_TYPE_DOUBLE :
 		     FIELD_TYPE_VAR_STRING);
   }
-  tmp_field->table_name=(char*)"";
-  tmp_field->col_name=name;
+  tmp_field->db_name=(char*)"";
+  tmp_field->org_table_name=tmp_field->table_name=(char*)"";
+  tmp_field->org_col_name=tmp_field->col_name=name;
 }
 
 void Item_sum::print(String *str)

sql/lex.h

@@ -129,6 +129,7 @@ static SYMBOL symbols[] = {
   { "DROP",		SYM(DROP),0,0},
   { "DUMPFILE",		SYM(DUMPFILE),0,0},
   { "DYNAMIC",		SYM(DYNAMIC_SYM),0,0},
+  { "ERRORS",		SYM(ERRORS),0,0},
   { "END",		SYM(END),0,0},
   { "ELSE",             SYM(ELSE),0,0},
   { "ESCAPE",		SYM(ESCAPE_SYM),0,0},
@@ -327,6 +328,7 @@ static SYMBOL symbols[] = {
   { "SQL_BUFFER_RESULT", SYM(SQL_BUFFER_RESULT),0,0},
   { "SQL_CACHE",        SYM(SQL_CACHE_SYM), 0, 0},
   { "SQL_CALC_FOUND_ROWS", SYM(SQL_CALC_FOUND_ROWS),0,0},
+  { "SQL_ERROR_COUNT",	SYM(SQL_ERROR_COUNT),0,0},
   { "SQL_LOG_BIN",	SYM(SQL_LOG_BIN),0,0},
   { "SQL_LOG_OFF",	SYM(SQL_LOG_OFF),0,0},
   { "SQL_LOG_UPDATE",	SYM(SQL_LOG_UPDATE),0,0},
@@ -366,6 +368,7 @@ static SYMBOL symbols[] = {
   { "TRUNCATE",		SYM(TRUNCATE_SYM),0,0},
   { "TO",		SYM(TO_SYM),0,0},
   { "TYPE",		SYM(TYPE_SYM),0,0},
+  { "TYPES",		SYM(TYPES_SYM),0,0},
   { "UNCOMMITTED",	SYM(UNCOMMITTED_SYM),0,0},
   { "UNION",	        SYM(UNION_SYM),0,0},
   { "UNIQUE",		SYM(UNIQUE_SYM),0,0},
@@ -381,6 +384,7 @@ static SYMBOL symbols[] = {
   { "VARIABLES",	SYM(VARIABLES),0,0},
   { "VARYING",		SYM(VARYING),0,0},
   { "VARBINARY",	SYM(VARBINARY),0,0},
+  { "WARNINGS",		SYM(WARNINGS),0,0},
   { "WITH",		SYM(WITH),0,0},
   { "WORK",		SYM(WORK_SYM),0,0},
   { "WRITE",		SYM(WRITE_SYM),0,0},

sql/mysql_priv.h

@@ -287,6 +287,8 @@ inline THD *_current_thd(void)
 #define query_cache_invalidate_by_MyISAM_filename_ref NULL
 #endif /*HAVE_QUERY_CACHE*/
 
+#define prepare_execute(A) ((A)->command == COM_EXECUTE)
+
 int mysql_create_db(THD *thd, char *db, uint create_info, bool silent);
 int mysql_rm_db(THD *thd,char *db,bool if_exists, bool silent);
 void mysql_binlog_send(THD* thd, char* log_ident, ulong pos, ushort flags);
@@ -363,6 +365,8 @@ bool net_store_data(String *packet, CONVERT *convert, const char *from);
 SORT_FIELD * make_unireg_sortorder(ORDER *order, uint *length);
 int setup_order(THD *thd,TABLE_LIST *tables, List<Item> &fields,
                 List <Item> &all_fields, ORDER *order);
+int setup_group(THD *thd,TABLE_LIST *tables,List<Item> &fields,
+	    List<Item> &all_fields, ORDER *order, bool *hidden_group_fields);
 
 int handle_select(THD *thd, LEX *lex, select_result *result);
 int mysql_select(THD *thd,TABLE_LIST *tables,List<Item> &list,COND *conds,
@@ -455,7 +459,7 @@ bool load_des_key_file(const char *file_name);
 /* sql_do.cc */
 int mysql_do(THD *thd, List<Item> &values);
 
-/* sql_list.c */
+/* sql_show.c */
 int mysqld_show_dbs(THD *thd,const char *wild);
 int mysqld_show_open_tables(THD *thd,const char *wild);
 int mysqld_show_tables(THD *thd,const char *db,const char *wild);
@@ -473,6 +477,24 @@ int mysqld_show_status(THD *thd);
 int mysqld_show_variables(THD *thd,const char *wild);
 int mysqld_show(THD *thd, const char *wild, show_var_st *variables);
 int mysqld_show_charsets(THD *thd,const char *wild);
+int mysqld_show_privileges(THD *thd);
+int mysqld_show_column_types(THD *thd);
+
+/* sql_prepare.cc */
+void mysql_com_prepare(THD *thd,char*packet,uint packet_length);
+void mysql_init_query(THD *thd);/* sql_parse. cc */
+void mysql_com_execute(THD *thd);
+void mysql_com_longdata(THD *thd);
+int  check_insert_fields(THD *thd,TABLE *table,List<Item> &fields,
+		    List<Item> &values, ulong counter);
+
+/* sql_error.cc */
+void push_error(uint code, const char *msg);
+void push_warning(uint code, const char *msg);
+int mysqld_show_warnings(THD *thd);
+int mysqld_show_errors(THD *thd);
+int mysqld_show_warnings_count(THD *thd);
+int mysqld_show_errors_count(THD *);
 
 /* sql_handler.cc */
 int mysql_ha_open(THD *thd, TABLE_LIST *tables);
@@ -654,6 +676,10 @@ extern const char *default_tx_isolation_name;
 extern String empty_string;
 extern struct show_var_st init_vars[];
 extern struct show_var_st status_vars[];
+extern struct show_table_type_st table_type_vars[];
+extern SHOW_COMP_OPTION have_isam;
+extern SHOW_COMP_OPTION have_innodb;
+extern SHOW_COMP_OPTION have_berkeley_db;
 extern enum db_type default_table_type;
 extern enum enum_tx_isolation default_tx_isolation;
 extern char glob_hostname[FN_REFLEN];

sql/net_pkg.cc

@@ -48,6 +48,7 @@ void send_error(NET *net, uint sql_errno, const char *err)
       }
     }
   }
+  push_error(sql_errno, err);
   if (net->vio == 0)
   {
     if (thd && thd->bootstrap)
@@ -82,7 +83,14 @@ void send_error(NET *net, uint sql_errno, const char *err)
 
 void send_warning(NET *net, uint sql_errno, const char *err)
 {
-  DBUG_ENTER("send_warning");
+  DBUG_ENTER("send_warning");  
+  push_warning(sql_errno, err ? err : ER(sql_errno)); 
+
+  /*
+    TODO : 
+    Try to return ok with warning status to client, instead 
+    of returning error .. 
+  */
   send_error(net,sql_errno,err);
   DBUG_VOID_RETURN;
 }
@@ -123,6 +131,7 @@ net_printf(NET *net, uint errcode, ...)
     length=sizeof(net->last_error)-1;		/* purecov: inspected */
   va_end(args);
 
+  push_error(errcode, text_pos);
   if (net->vio == 0)
   {
     if (thd && thd->bootstrap)

sql/sql_base.cc

@@ -179,56 +179,58 @@ OPEN_TABLE_LIST *list_open_tables(THD *thd, const char *wild)
   DBUG_RETURN(open_list);
 }
 
-
-/******************************************************************************
-** Send name and type of result to client.
-** Sum fields has table name empty and field_name.
-** flag is a bit mask with the following functions:
-**   1 send number of rows
-**   2 send default values
-**   4 Don't convert field names
-******************************************************************************/
+/*
+  Send name and type of result to client. 
+  Sum fields has table name empty and field_name.
+  flag is a bit mask with the following functions:
+   1 send number of rows
+   2 send default values
+   4 Don't convert field names
+*/
 
 bool
-send_fields(THD *thd,List<Item> &list,uint flag)
+send_convert_fields(THD *thd,List<Item> &list,CONVERT *convert,uint flag)
 {
   List_iterator_fast<Item> it(list);
   Item *item;
   char buff[80];
-  CONVERT *convert= (flag & 4) ? (CONVERT*) 0 : thd->convert_set;
-  DBUG_ENTER("send_fields");
-
+  
   String tmp((char*) buff,sizeof(buff),default_charset_info);
   String *res,*packet= &thd->packet;
-
-  if (thd->fatal_error)		// We have got an error
-    goto err;
-
-  if (flag & 1)
-  {				// Packet with number of elements
-    char *pos=net_store_length(buff,(uint) list.elements);
-    (void) my_net_write(&thd->net, buff,(uint) (pos-buff));
-  }
+  
   while ((item=it++))
   {
     char *pos;
     Send_field field;
     item->make_field(&field);
+    
     packet->length(0);
 
-    if (convert)
+    if (thd->client_capabilities & CLIENT_PROTOCOL_41)
     {
-      if (convert->store(packet,field.table_name,
+      if (convert->store(packet,field.db_name,
+			 (uint) strlen(field.db_name)) ||
+	  convert->store(packet,field.table_name,
 			 (uint) strlen(field.table_name)) ||
+	  convert->store(packet,field.org_table_name,
+			 (uint) strlen(field.org_table_name)) ||
 	  convert->store(packet,field.col_name,
 			 (uint) strlen(field.col_name)) ||
+	  convert->store(packet,field.org_col_name,
+			 (uint) strlen(field.org_col_name)) ||
 	  packet->realloc(packet->length()+10))
-	goto err;
+	return 1;
+     }
+     else
+     {
+       if (convert->store(packet,field.table_name,
+			  (uint) strlen(field.table_name)) ||
+	   convert->store(packet,field.col_name,
+			  (uint) strlen(field.col_name)) ||
+	   packet->realloc(packet->length()+10))
+	 return 1;
     }
-    else if (net_store_data(packet,field.table_name) ||
-	     net_store_data(packet,field.col_name) ||
-	     packet->realloc(packet->length()+10))
-      goto err; /* purecov: inspected */
+     
     pos= (char*) packet->ptr()+packet->length();
 
     if (!(thd->client_capabilities & CLIENT_LONG_FLAG))
@@ -250,19 +252,135 @@ send_fields(THD *thd,List<Item> &list,uint flag)
       if (!(res=item->val_str(&tmp)))
       {
 	if (net_store_null(packet))
-	  goto err;
+	  return 1;
       }
       else if (net_store_data(packet,res->ptr(),res->length()))
-	goto err;
+	return 1;
     }
     if (my_net_write(&thd->net, (char*) packet->ptr(),packet->length()))
       break;					/* purecov: inspected */
   }
-  send_eof(&thd->net,1);
-  DBUG_RETURN(0);
- err:
+  return 0;
+}
+
+/*
+ Send name and type of result to client.
+ Sum fields has table name empty and field_name
+ flag is a bit mask with the following functios:
+   1 send number of rows
+   2 send default values
+   4 Don't convert field names
+*/
+
+bool 
+send_non_convert_fields(THD *thd,List<Item> &list,uint flag)
+{
+  List_iterator_fast<Item> it(list);
+  Item *item;
+  char buff[80];
+  
+  String tmp((char*) buff,sizeof(buff),default_charset_info);
+  String *res,*packet= &thd->packet;
+  
+  while ((item=it++))
+  {
+    char *pos;
+    Send_field field;
+    item->make_field(&field);
+    
+    packet->length(0);
+
+    if (thd->client_capabilities & CLIENT_PROTOCOL_41)
+    {
+      if (net_store_data(packet,field.db_name) ||
+	  net_store_data(packet,field.table_name) ||
+	  net_store_data(packet,field.org_table_name) ||
+	  net_store_data(packet,field.col_name) ||
+	  net_store_data(packet,field.org_col_name) ||
+	  packet->realloc(packet->length()+10))
+	return 1;
+    }
+    else
+    {
+      if (net_store_data(packet,field.table_name) ||
+	  net_store_data(packet,field.col_name) ||
+	  packet->realloc(packet->length()+10))
+	return 1;
+    }
+    
+    pos= (char*) packet->ptr()+packet->length();
+
+    if (!(thd->client_capabilities & CLIENT_LONG_FLAG))
+    {
+      packet->length(packet->length()+9);
+      pos[0]=3; int3store(pos+1,field.length);
+      pos[4]=1; pos[5]=field.type;
+      pos[6]=2; pos[7]=(char) field.flags; pos[8]= (char) field.decimals;
+    }
+    else
+    {
+      packet->length(packet->length()+10);
+      pos[0]=3; int3store(pos+1,field.length);
+      pos[4]=1; pos[5]=field.type;
+      pos[6]=3; int2store(pos+7,field.flags); pos[9]= (char) field.decimals;
+    }
+    if (flag & 2)
+    {						// Send default value
+      if (!(res=item->val_str(&tmp)))
+      {
+	if (net_store_null(packet))
+	  return 1;
+      }
+      else if (net_store_data(packet,res->ptr(),res->length()))
+	return 1;
+    }
+    if (my_net_write(&thd->net, (char*) packet->ptr(),packet->length()))
+      break;					
+  }
+  return 0;
+}
+
+/******************************************************************************
+** Send name and type of result to client.
+** Sum fields has table name empty and field_name.
+** flag is a bit mask with the following functions:
+**   1 send number of rows
+**   2 send default values
+**   4 Don't convert field names
+******************************************************************************/
+
+bool
+send_fields(THD *thd,List<Item> &list,uint flag)
+{
+  List_iterator_fast<Item> it(list);  
+  char buff[80];
+  CONVERT *convert= (flag & 4) ? (CONVERT*) 0 : thd->convert_set;
+
+  String tmp((char*) buff,sizeof(buff),default_charset_info);
+
+  if (thd->fatal_error)		// We have got an error
+    goto err;
+
+  if (flag & 1)
+  {				// Packet with number of elements
+    char *pos=net_store_length(buff,(uint) list.elements);
+    (void) my_net_write(&thd->net, buff,(uint) (pos-buff));
+  }
+
+  /* Avoid check conditions on convert() for each field 
+     by having two diffrent functions 
+  */
+  if (convert && send_convert_fields(thd,list,convert,flag))
+    goto err;
+
+  else if(send_non_convert_fields(thd,list,flag))
+    goto err;
+  
+  send_eof(&thd->net);
+  return 0;
+err:
   send_error(&thd->net,ER_OUT_OF_RESOURCES);	/* purecov: inspected */
-  DBUG_RETURN(1);				/* purecov: inspected */
+  return 1;					/* purecov: inspected */
 }
 
 

sql/sql_class.cc

@@ -140,6 +140,7 @@ THD::THD():user_time(0),fatal_error(0),last_insert_id_used(0),
   command=COM_CONNECT;
   set_query_id=1;
   default_select_limit= HA_POS_ERROR;
+  max_error_count=max_warning_count=MYSQL_DEFAULT_ERROR_COUNT;
   max_join_size=  ((::max_join_size != ~ (ulong) 0L) ? ::max_join_size :
 		   HA_POS_ERROR);
   db_access=NO_ACCESS;
@@ -147,6 +148,7 @@ THD::THD():user_time(0),fatal_error(0),last_insert_id_used(0),
   /* Initialize sub structures */
   bzero((char*) &mem_root,sizeof(mem_root));
   bzero((char*) &transaction.mem_root,sizeof(transaction.mem_root));
+  bzero((char*) &con_root,sizeof(con_root));
   user_connect=(USER_CONN *)0;
   hash_init(&user_vars, system_charset_info, USER_VARS_HASH_SIZE, 0, 0,
 	    (hash_get_key) get_var_key,
@@ -223,6 +225,7 @@ THD::~THD()
   safeFree(db);
   safeFree(ip);
   free_root(&mem_root,MYF(0));
+  free_root(&con_root,MYF(0));
   free_root(&transaction.mem_root,MYF(0));
   mysys_var=0;					// Safety (shouldn't be needed)
 #ifdef SIGNAL_WITH_VIO_CLOSE

sql/sql_class.h

@@ -289,7 +289,30 @@ public:
   i_string_pair():key(0),val(0) { }
   i_string_pair(char* key_arg, char* val_arg) : key(key_arg),val(val_arg) {}
 };
+#define MYSQL_DEFAULT_ERROR_COUNT 500
 
+class mysql_st_error
+{
+public:
+  uint code;
+  char msg[MYSQL_ERRMSG_SIZE+1];
+  char query[NAME_LEN+1]; 
+  
+  static void *operator new(size_t size)
+  {
+    return (void*)my_malloc((uint)size, MYF(MY_WME | MY_FAE));
+  }
+  static void operator delete(void* ptr_arg, size_t size)
+  {
+    my_free((gptr)ptr_arg, MYF(MY_WME|MY_ALLOW_ZERO_PTR));
+  }
+  mysql_st_error(uint ecode, const char *emsg, const char *equery)
+  {
+    code = ecode;
+    strmov(msg, emsg); 
+    strnmov(query, equery ? equery : "", NAME_LEN);    
+  }
+};
 
 class delayed_insert;
 
@@ -308,6 +331,7 @@ public:
   NET	  net;				// client connection descriptor
   LEX	  lex;				// parse tree descriptor
   MEM_ROOT mem_root;			// 1 command-life memory
+  MEM_ROOT con_root;                    // connection-life memory
   HASH     user_vars;			// hash for user variables
   String  packet;			// buffer used for network I/O		
   struct  sockaddr_in remote;		// client socket address
@@ -410,7 +434,8 @@ public:
              max_join_size, sent_row_count, examined_row_count;
   table_map  used_tables;
   USER_CONN *user_connect;
-  ulong	     query_id,version, inactive_timeout,options,thread_id;
+  ulong	     query_id,version, inactive_timeout,options,thread_id,
+             max_error_count, max_warning_count;
   long	     dbug_thread_id;
   pthread_t  real_id;
   uint	     current_tablenr,tmp_table,cond_count,col_access;
@@ -428,8 +453,13 @@ public:
   bool       query_error, bootstrap, cleanup_done;
   bool	     safe_to_cache_query;
   bool	     volatile killed;
-  //  TRUE when having fix field called
-  bool       having_fix_field;
+  bool       having_fix_field; //TRUE when having fix field called
+  bool       prepare_command;  
+  ulong      param_count,current_param_number;  
+  Error<mysql_st_error> err_list;  
+  Error<mysql_st_error> warn_list; 
+  Item_param *current_param;     
+
   /*
     If we do a purge of binary logs, log index info of the threads
     that are currently reading it needs to be adjusted. To do that

sql/sql_error.cc

+/* Copyright (C) 1995-2002 MySQL AB
+
+   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.
+
+   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.
+
+   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
+*/
+
+/**********************************************************************
+This file contains the implementation of error and warnings related
+
+  - Whenever an error or warning occured, it pushes the same to
+    the respective list along with sending it to client.
+
+  - When client requests the information using SHOW command, then 
+    server processes from this list and returns back in the form of 
+    resultset.
+
+    syntax : SHOW [COUNT(*)] ERRORS [LIMIT [offset,] rows]
+             SHOW [COUNT(*)] WARNINGS [LIMIT [offset,] rows]
+
+***********************************************************************/
+/* Handles errors and warnings .. */
+
+#include "mysql_priv.h"
+
+/* 
+  Push the error to error list
+*/
+
+void push_error(uint code, const char *msg)
+{
+  THD *thd=current_thd;
+
+  mysql_st_error *err = new mysql_st_error(code,msg,(const char*)thd->query);  
+  
+  if (thd->err_list.elements >= thd->max_error_count)
+  {
+    /* Remove the old elements and always maintain the max size 
+       equal to sql_error_count.
+       
+       If one max_error_count using sets sql_error_count less than 
+       the current list size, then make sure it always grows upto 
+       sql_error_count size only
+
+       ** BUG ** : Doesn't work in removing the old one 
+       from the list, and thus SET SQL_ERROR_COUNT=x doesn't work
+    */
+    for (uint count=thd->err_list.elements-1; 
+         count <= thd->max_error_count-1; count++)
+    {      
+      thd->err_list.remove_last();
+    }
+  }  
+  thd->err_list.push_front(err);  
+}
+
+/* 
+  Push the warning to warning list
+*/
+
+void push_warning(uint code, const char *msg)
+{  
+  THD *thd=current_thd;
+
+  mysql_st_error *warn = new mysql_st_error(code,msg,(const char *)thd->query);   
+  
+  if (thd->warn_list.elements >= thd->max_warning_count)
+  {
+    /* Remove the old elements and always maintian the max size 
+       equal to sql_error_count 
+    */
+    for (uint count=thd->warn_list.elements; 
+         count <= thd->max_warning_count-1; count++)
+    {
+      thd->warn_list.remove_last();
+    }
+  }    
+  thd->warn_list.push_front(warn);
+}
+
+/*
+  List all errors 
+*/
+
+int mysqld_show_errors(THD *thd)
+{  
+  List<Item> field_list;
+  DBUG_ENTER("mysqld_show_errors");
+
+  field_list.push_back(new Item_int("CODE",0,4));
+  field_list.push_back(new Item_empty_string("MESSAGE",MYSQL_ERRMSG_SIZE)); 
+  field_list.push_back(new Item_empty_string("QUERY",NAME_LEN));
+
+  if (send_fields(thd,field_list,1))
+    DBUG_RETURN(1);
+
+  mysql_st_error *err;
+  SELECT_LEX *sel=&thd->lex.select_lex;
+  ha_rows offset = sel->offset_limit,limit = sel->select_limit;
+  uint num_rows = 0;
+  
+  Error_iterator<mysql_st_error> it(thd->err_list);
+
+  while(offset-- && (err = it++));/* Should be fixed with overloaded
+				     operator '+' or with new funtion 
+				     goto() in list ?
+				  */
+
+  while((num_rows++ < limit) && (err = it++))
+  {
+    thd->packet.length(0);
+    net_store_data(&thd->packet,(uint32)err->code);
+    net_store_data(&thd->packet,err->msg);
+    net_store_data(&thd->packet,err->query);
+    
+    if (my_net_write(&thd->net,(char*)thd->packet.ptr(),thd->packet.length()))
+      DBUG_RETURN(-1);
+  }
+  send_eof(&thd->net);  
+  DBUG_RETURN(0);
+}
+
+/*
+  Return errors count 
+*/
+
+int mysqld_show_errors_count(THD *thd)
+{
+  List<Item> field_list;
+  DBUG_ENTER("mysqld_show_errors_count");
+
+  field_list.push_back(new Item_int("COUNT(*)",0,4));
+
+  if (send_fields(thd,field_list,1))
+    DBUG_RETURN(1);
+
+  thd->packet.length(0);
+  net_store_data(&thd->packet,(uint32)thd->err_list.elements);
+
+  if (my_net_write(&thd->net,(char*) thd->packet.ptr(),thd->packet.length()))
+    DBUG_RETURN(-1);  
+
+  send_eof(&thd->net);
+  DBUG_RETURN(0);
+}
+
+/*
+  List all warnings 
+*/
+
+int mysqld_show_warnings(THD *thd)
+{
+  List<Item> field_list;
+  DBUG_ENTER("mysqld_show_warnings");
+
+  field_list.push_back(new Item_int("CODE",0,21));
+  field_list.push_back(new Item_empty_string("MESSAGE",MYSQL_ERRMSG_SIZE));   
+  field_list.push_back(new Item_empty_string("QUERY",NAME_LEN));
+
+  if (send_fields(thd,field_list,1))
+    DBUG_RETURN(1);
+
+  mysql_st_error *warn;
+
+  
+  SELECT_LEX *sel=&thd->lex.select_lex;
+  ha_rows offset = sel->offset_limit,limit = sel->select_limit;
+  uint num_rows = 0;
+  
+  Error_iterator<mysql_st_error> it(thd->warn_list);
+  while(offset-- && (warn = it++));
+  while((num_rows++ < limit) && (warn = it++))
+  {
+    thd->packet.length(0);
+    net_store_data(&thd->packet,(uint32)warn->code);
+    net_store_data(&thd->packet,warn->msg);
+    net_store_data(&thd->packet,warn->query);
+    
+    if (my_net_write(&thd->net,(char*) thd->packet.ptr(),thd->packet.length()))
+      DBUG_RETURN(-1);
+  }
+  send_eof(&thd->net);  
+  DBUG_RETURN(0);
+}
+
+/*
+  Return warnings count 
+*/
+
+int mysqld_show_warnings_count(THD *thd)
+{
+  List<Item> field_list;
+  DBUG_ENTER("mysqld_show_warnings_count");
+
+  field_list.push_back(new Item_int("COUNT(*)",0,21));
+
+  if (send_fields(thd,field_list,1))
+    DBUG_RETURN(1);
+
+  thd->packet.length(0);
+  net_store_data(&thd->packet,(uint32)thd->warn_list.elements);
+
+  if (my_net_write(&thd->net,(char*)thd->packet.ptr(),thd->packet.length()))
+    DBUG_RETURN(-1);
+   
+  send_eof(&thd->net);
+  DBUG_RETURN(0);
+}
+

sql/sql_insert.cc

@@ -44,7 +44,7 @@ static void unlink_blobs(register TABLE *table);
   Resets form->time_stamp if a timestamp value is set
 */
 
-static int
+int
 check_insert_fields(THD *thd,TABLE *table,List<Item> &fields,
 		    List<Item> &values, ulong counter)
 {

sql/sql_lex.h

@@ -57,8 +57,10 @@ enum enum_sql_command {
   SQLCOM_HA_OPEN, SQLCOM_HA_CLOSE, SQLCOM_HA_READ,
   SQLCOM_SHOW_SLAVE_HOSTS, SQLCOM_DELETE_MULTI, SQLCOM_MULTI_UPDATE,
   SQLCOM_SHOW_BINLOG_EVENTS, SQLCOM_SHOW_NEW_MASTER, SQLCOM_DO,
-  SQLCOM_EMPTY_QUERY,
-  SQLCOM_END
+  SQLCOM_END, SQLCOM_SHOW_WARNS, SQLCOM_SHOW_WARNS_COUNT, 
+  SQLCOM_EMPTY_QUERY, SQLCOM_SHOW_ERRORS, 
+  SQLCOM_SHOW_ERRORS_COUNT, SQLCOM_SHOW_COLUMN_TYPES,
+  SQLCOM_SHOW_TABLE_TYPES, SQLCOM_SHOW_PRIVILEGES
 };
 
 enum lex_states { STATE_START, STATE_CHAR, STATE_IDENT,
@@ -318,6 +320,7 @@ typedef struct st_lex {
   List<Item>	      *insert_list,field_list,value_list;
   List<List_item>     many_values;
   List<Set_option>    option_list;
+  List<Item>          param_list;
   SQL_LIST	      proc_list, auxilliary_table_list;
   TYPELIB	      *interval;
   create_field	      *last_field;

sql/sql_list.h

@@ -122,11 +122,14 @@ public:
       last= &first;
     return tmp->info;
   }
+  inline list_node* last_node() { return *last; }
+  inline list_node* first_node() { return first;}
   inline void *head() { return first->info; }
   inline void **head_ref() { return first != &end_of_list ? &first->info : 0; }
   inline bool is_empty() { return first == &end_of_list ; }
   inline list_node *last_ref() { return &end_of_list; }
   friend class base_list_iterator;
+  friend class error_list;
 
 protected:
   void after(void *info,list_node *node)
@@ -204,6 +207,7 @@ public:
   {
     return el == &list->last_ref()->next;
   }
+  friend class error_list_iterator;
 };
 
 
@@ -356,3 +360,120 @@ public:
   I_List_iterator(I_List<T> &a) : base_ilist_iterator(a) {}
   inline T* operator++(int) { return (T*) base_ilist_iterator::next(); }
 };
+
+/*
+  New error list without mem_root from THD, to have the life of the 
+  allocation becomes connection level . by ovveriding new from Sql_alloc. 
+*/
+class Error_alloc
+{
+public:
+  static void *operator new(size_t size)
+  {
+    return (void*)my_malloc((uint)size, MYF(MY_WME | MY_FAE));
+  }
+#if 0
+  static void operator delete(void* ptr_arg, size_t size)
+  {
+    my_free((gptr)ptr_arg, MYF(MY_WME|MY_ALLOW_ZERO_PTR));  
+  }
+#endif
+  friend class error_node;
+  friend class error_list;
+};
+
+class error_node :public Error_alloc, public list_node
+{
+public:
+  static void *operator new(size_t size)
+  {
+    return (void*)my_malloc((uint)size, MYF(MY_WME | MY_FAE));
+  }
+#if 0
+  static void operator delete(void* ptr_arg, size_t size)
+  {
+    my_free((gptr)ptr_arg, MYF(MY_WME|MY_ALLOW_ZERO_PTR));  
+  }
+#endif
+  error_node(void *info_par,list_node *next_par):list_node(info_par,next_par){};
+  error_node() : list_node() {};
+  friend class error_list;
+  friend class error_list_iterator;
+};
+
+class error_list: public Error_alloc, public base_list
+{
+public:
+  inline error_list() : base_list() { };  
+  inline error_list(const error_list &tmp) : Error_alloc()
+  {
+    elements=tmp.elements;
+    first=tmp.first;
+    last=tmp.last; 
+  }
+  inline bool push_front(void *info)
+  {
+    error_node *node=new error_node(info,first);
+    if (node)
+    {
+      if (last == &first)
+        last= &node->next;
+      first=node;
+      elements++;
+      return 0;
+    }
+    return 1;
+  }
+  inline void remove_last(void)
+  {
+    remove(last);
+  }
+protected:
+  void after(void *info,list_node *node)
+  {
+    error_node *new_node=new error_node(info,node->next);
+    node->next=new_node;
+    elements++;
+    if (last == &(node->next))
+      last= &new_node->next;
+  }
+};
+
+class error_list_iterator : public base_list_iterator 
+{ 
+  inline error_list_iterator(base_list &base_ptr): base_list_iterator(base_ptr) {};
+};
+
+template <class T> class Error :public error_list
+{
+public:
+  inline Error() :error_list() {}
+  inline Error(const Error<T> &tmp) :error_list(tmp) {}
+  inline bool push_back(T *a) { return error_list::push_back(a); }
+  inline bool push_front(T *a) { return error_list::push_front(a); }
+  inline T* head() {return (T*) error_list::head(); }
+  inline T** head_ref() {return (T**) error_list::head_ref(); }
+  inline T* pop()  {return (T*) error_list::pop(); }
+  void delete_elements(void)
+  {
+    error_node *element,*next;
+    for (element=first; element != &error_end_of_list; element=next)
+    {
+      next=element->next;
+      delete (T*) element->info;
+    }
+    empty();
+  }
+};
+
+template <class T> class Error_iterator :public base_list_iterator
+{
+public:
+  Error_iterator(Error<T> &a) : base_list_iterator(a) {}
+  inline T* operator++(int) { return (T*) base_list_iterator::next(); }
+  inline T *replace(T *a)   { return (T*) base_list_iterator::replace(a); }
+  inline T *replace(Error<T> &a) { return (T*) base_list_iterator::replace(a); }
+  inline void after(T *a)   { base_list_iterator::after(a); }
+  inline T** ref(void)      { return (T**) base_list_iterator::ref(); }
+};
+

sql/sql_parse.cc

@@ -65,7 +65,6 @@ static void decrease_user_connections(USER_CONN *uc);
 static bool check_db_used(THD *thd,TABLE_LIST *tables);
 static bool check_merge_table_access(THD *thd, char *db, TABLE_LIST *tables);
 static bool check_dup(const char *db, const char *name, TABLE_LIST *tables);
-void mysql_init_query(THD *thd);
 static void remove_escape(char *name);
 static void refresh_status(void);
 static bool append_file_to_dir(THD *thd, char **filename_ptr,
@@ -77,7 +76,8 @@ const char *command_name[]={
   "Sleep", "Quit", "Init DB", "Query", "Field List", "Create DB",
   "Drop DB", "Refresh", "Shutdown", "Statistics", "Processlist",
   "Connect","Kill","Debug","Ping","Time","Delayed_insert","Change user",
-  "Binlog Dump","Table Dump",  "Connect Out", "Register Slave"
+  "Binlog Dump","Table Dump",  "Connect Out", "Register Slave",
+  "Prepare", "Prepare Execute", "Long Data"
 };
 
 bool volatile abort_slave = 0;
@@ -486,7 +486,7 @@ check_connections(THD *thd)
   {
     /* buff[] needs to big enough to hold the server_version variable */
     char buff[SERVER_VERSION_LENGTH + SCRAMBLE_LENGTH+32],*end;
-    int client_flags = CLIENT_LONG_FLAG | CLIENT_CONNECT_WITH_DB;
+    int client_flags = CLIENT_LONG_FLAG | CLIENT_CONNECT_WITH_DB | CLIENT_PROTOCOL_41;
 
     if (opt_using_transactions)
       client_flags|=CLIENT_TRANSACTIONS;
@@ -957,7 +957,21 @@ bool dispatch_command(enum enum_server_command command, THD *thd,
     thd->password=test(passwd[0]);
     break;
   }
-
+  case COM_EXECUTE:
+  {
+    mysql_com_execute(thd);
+    break;
+  }
+  case COM_LONG_DATA:
+  {
+    mysql_com_longdata(thd);
+    break;
+  }
+  case COM_PREPARE:
+  {
+    mysql_com_prepare(thd,packet,packet_length);
+    break;
+  }
   case COM_QUERY:
   {
     packet_length--;				// Remove end null
@@ -1380,6 +1394,26 @@ mysql_execute_command(void)
     res = purge_master_logs(thd, lex->to_log);
     break;
   }
+  case SQLCOM_SHOW_WARNS_COUNT:
+  {
+    res = mysqld_show_warnings_count(thd);
+    break;
+  }
+  case SQLCOM_SHOW_WARNS:
+  {
+    res = mysqld_show_warnings(thd);
+    break;
+  }
+  case SQLCOM_SHOW_ERRORS_COUNT:
+  {
+    res = mysqld_show_errors_count(thd);
+    break;
+  }
+  case SQLCOM_SHOW_ERRORS:
+  {
+    res = mysqld_show_errors(thd);
+    break;
+  }
   case SQLCOM_SHOW_NEW_MASTER:
   {
     if (check_access(thd, FILE_ACL, any_db))
@@ -2048,6 +2082,15 @@ mysql_execute_command(void)
     mysqld_list_processes(thd,thd->master_access & PROCESS_ACL ? NullS :
 			  thd->priv_user,lex->verbose);
     break;
+  case SQLCOM_SHOW_TABLE_TYPES:
+    res= mysqld_show_table_types(thd);
+    break;
+  case SQLCOM_SHOW_PRIVILEGES:
+    res= mysqld_show_privileges(thd);
+    break;
+  case SQLCOM_SHOW_COLUMN_TYPES:
+    res= mysqld_show_column_types(thd);
+    break;
   case SQLCOM_SHOW_STATUS:
     res= mysqld_show(thd,(lex->wild ? lex->wild->ptr() : NullS),status_vars);
     break;
@@ -2732,6 +2775,9 @@ mysql_init_query(THD *thd)
   thd->last_insert_id_used= thd->query_start_used= thd->insert_id_used=0;
   thd->sent_row_count= thd->examined_row_count= 0;
   thd->safe_to_cache_query= 1;
+  thd->param_count=0;
+  thd->prepare_command=false;
+  thd->lex.param_list.empty();
   DBUG_VOID_RETURN;
 }
 

sql/sql_select.cc

@@ -126,8 +126,6 @@ static bool store_record_in_cache(JOIN_CACHE *cache);
 static void reset_cache(JOIN_CACHE *cache);
 static void read_cached_record(JOIN_TAB *tab);
 static bool cmp_buffer_with_ref(JOIN_TAB *tab);
-static int setup_group(THD *thd,TABLE_LIST *tables,List<Item> &fields,
-		       List<Item> &all_fields, ORDER *order, bool *hidden);
 static bool setup_new_fields(THD *thd,TABLE_LIST *tables,List<Item> &fields,
 			     List<Item> &all_fields,ORDER *new_order);
 static ORDER *create_distinct_group(ORDER *order, List<Item> &fields);
@@ -6456,7 +6454,7 @@ int setup_order(THD *thd,TABLE_LIST *tables,List<Item> &fields,
 }
 
 
-static int
+int
 setup_group(THD *thd,TABLE_LIST *tables,List<Item> &fields,
 	    List<Item> &all_fields, ORDER *order, bool *hidden_group_fields)
 {

sql/sql_show.cc

@@ -169,6 +169,201 @@ int mysqld_show_tables(THD *thd,const char *db,const char *wild)
   DBUG_RETURN(0);
 }
 
+/***************************************************************************
+** List all table types supported 
+***************************************************************************/
+
+static struct show_table_type_st sys_table_types[]= {
+  {"MyISAM", (char *)"YES", "Default type from 3.23 with great performance"},
+  {"HEAP"  , (char *)"YES", "Hash based, stored in memory, useful for temporary tables"},
+  {"MERGE",  (char *)"YES", "Collection of identical MyISAM tables"},
+  {"ISAM",   (char*) &have_isam,"Obsolete table type"},
+  {"InnoDB", (char*) &have_innodb,"Supports transactions, row-level locking and foreign keys"},
+  {"BDB",    (char*) &have_berkeley_db, "Supports transactions and page-level locking"},
+};
+
+int mysqld_show_table_types(THD *thd)
+{
+  List<Item> field_list;
+  DBUG_ENTER("mysqld_show_table_types");
+
+  field_list.push_back(new Item_empty_string("Type",10));
+  field_list.push_back(new Item_empty_string("Support",10));
+  field_list.push_back(new Item_empty_string("Comment",NAME_LEN));
+
+  if (send_fields(thd,field_list,1))
+    DBUG_RETURN(1);
+
+  const char *default_type_name=ha_table_typelib.type_names[default_table_type-1];
+  show_table_type_st *types = sys_table_types;
+
+  uint i;
+  for (i = 0; i < 3; i++)
+  {
+    thd->packet.length(0);
+    net_store_data(&thd->packet,types[i].type);
+    if (!strcasecmp(default_type_name,types[i].type))
+      net_store_data(&thd->packet,"DEFAULT");
+    else 
+      net_store_data(&thd->packet,types[i].value);    
+    net_store_data(&thd->packet,types[i].comment);
+    if (my_net_write(&thd->net,(char*) thd->packet.ptr(),thd->packet.length()))
+      DBUG_RETURN(-1);
+  }
+
+  for (; i < sizeof(sys_table_types)/sizeof(sys_table_types[0]); i++)
+  {
+    thd->packet.length(0);
+    net_store_data(&thd->packet,types[i].type);
+	  SHOW_COMP_OPTION tmp= *(SHOW_COMP_OPTION*) types[i].value;
+    
+    if (tmp == SHOW_OPTION_NO) 
+      net_store_data(&thd->packet,"NO");
+		else 
+    {
+      if (tmp == SHOW_OPTION_YES)
+      {        
+        if (!strcasecmp(default_type_name,types[i].type))
+          net_store_data(&thd->packet,"DEFAULT");
+        else
+          net_store_data(&thd->packet,"YES"); 
+      }
+      else net_store_data(&thd->packet,"DISABLED");      
+    }
+    net_store_data(&thd->packet,types[i].comment);
+    if (my_net_write(&thd->net,(char*) thd->packet.ptr(),thd->packet.length()))
+      DBUG_RETURN(-1);
+  }
+  send_eof(&thd->net);
+  DBUG_RETURN(0);
+}
+
+/***************************************************************************
+** List all privileges supported 
+***************************************************************************/
+
+static struct show_table_type_st sys_privileges[]= {
+  {"Select", (char *)"Tables",  "To retrieve rows from table"},
+  {"Insert", (char *)"Tables",  "To insert data into tables"},
+  {"Update", (char *)"Tables",  "To update existing rows "},
+  {"Delete", (char *)"Tables",  "To delete existing rows"},
+  {"Index",  (char *)"Tables",  "To create or drop indexes"},
+  {"Alter",  (char *)"Tables",  "To alter the table"},
+  {"Create", (char *)"Databases,Tables,Indexes",  "To create new databases and tables"},
+  {"Drop",   (char *)"Databases,Tables", "To drop databases and tables"},
+  {"Grant",  (char *)"Databases,Tables", "To give to other users those privileges you possesed"},
+  {"References", (char *)"Databases,Tables", "To have references on tables"},
+  {"Reload",  (char *)"Server Admin", "To reload or refresh tables, logs and privileges"},
+  {"Shutdown",(char *)"Server Admin", "To shutdown the server"},
+  {"Process", (char *)"Server Admin", "To view the plain text of currently executing queries"},
+  {"File",    (char *)"File access on server",   "To read and write files on the server"},
+};
+
+int mysqld_show_privileges(THD *thd)
+{
+  List<Item> field_list;
+  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));
+
+  if (send_fields(thd,field_list,1))
+    DBUG_RETURN(1);
+
+  for (uint i=0; i < sizeof(sys_privileges)/sizeof(sys_privileges[0]); i++)
+  {
+    thd->packet.length(0);
+    net_store_data(&thd->packet,sys_privileges[i].type);
+    net_store_data(&thd->packet,sys_privileges[i].value);
+    net_store_data(&thd->packet,sys_privileges[i].comment);
+    if (my_net_write(&thd->net,(char*) thd->packet.ptr(),thd->packet.length()))
+      DBUG_RETURN(-1);
+  }
+  send_eof(&thd->net);
+  DBUG_RETURN(0);
+}
+
+
+/***************************************************************************
+** List all column types
+***************************************************************************/
+
+#if 0
+struct show_column_type_st {
+  const char *type;
+  uint size;
+  char *min_value;
+  char *max_value;
+  uint precision,
+  uint scale,
+  char *nullable;
+  char *auto_increment;
+  char *unsigned_attr;
+  char *zerofill;
+  char *searchable;
+  char *case_sensitivity;
+  char *default_value;
+  char *comment;
+};
+#endif
+static struct show_column_type_st sys_column_types[]= {
+  {"tinyint",
+    1,  "-128",  "127",  0,  0,  "YES",  "YES",
+    "NO",   "YES", "YES",  "NO",  "NULL,0",  
+    "A very small integer"}, 
+  {"tinyint unsigned",
+    1,  "0"   ,  "255",  0,  0,  "YES",  "YES",  
+    "YES",  "YES",  "YES",  "NO",  "NULL,0", 
+    "A very small integer"},
+};
+
+int mysqld_show_column_types(THD *thd)
+{
+  List<Item> field_list;
+  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));
+  field_list.push_back(new Item_int("Prec", 0,4));
+  field_list.push_back(new Item_int("Scale", 0,4));
+  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));
+
+  if (send_fields(thd,field_list,1))
+    DBUG_RETURN(1);
+
+  for (uint i=0; i < sizeof(sys_column_types)/sizeof(sys_column_types[0]); i++)
+  {
+    thd->packet.length(0);
+    net_store_data(&thd->packet,sys_column_types[i].type);
+    net_store_data(&thd->packet,(longlong)sys_column_types[i].size);
+    net_store_data(&thd->packet,sys_column_types[i].min_value);
+    net_store_data(&thd->packet,sys_column_types[i].max_value);
+    net_store_data(&thd->packet,(uint32)sys_column_types[i].precision);
+    net_store_data(&thd->packet,(uint32)sys_column_types[i].scale);
+    net_store_data(&thd->packet,sys_column_types[i].nullable);
+    net_store_data(&thd->packet,sys_column_types[i].auto_increment);
+    net_store_data(&thd->packet,sys_column_types[i].unsigned_attr);
+    net_store_data(&thd->packet,sys_column_types[i].zerofill);
+    net_store_data(&thd->packet,sys_column_types[i].searchable);
+    net_store_data(&thd->packet,sys_column_types[i].case_sensitivity);
+    net_store_data(&thd->packet,sys_column_types[i].default_value);
+    net_store_data(&thd->packet,sys_column_types[i].comment);
+    if (my_net_write(&thd->net,(char*) thd->packet.ptr(),thd->packet.length()))
+      DBUG_RETURN(-1);
+  }
+  send_eof(&thd->net);
+  DBUG_RETURN(0);
+}
 
 static int
 mysql_find_files(THD *thd,List<char> *files, const char *db,const char *path,

sql/sql_yacc.yy

@@ -324,6 +324,7 @@ bool my_yyoverflow(short **a, YYSTYPE **b,int *yystacksize);
 %token	TRAILING
 %token	TRANSACTION_SYM
 %token	TYPE_SYM
+%token  TYPES_SYM
 %token	FUNC_ARG0
 %token	FUNC_ARG1
 %token	FUNC_ARG2
@@ -346,6 +347,11 @@ bool my_yyoverflow(short **a, YYSTYPE **b,int *yystacksize);
 %token  X509_SYM
 %token  COMPRESSED_SYM
 
+%token  ERRORS
+%token  SQL_ERROR_COUNT
+%token  WARNINGS
+%token  SQL_WARNING_COUNT
+
 %token	BIGINT
 %token	BLOB_SYM
 %token	CHAR_SYM
@@ -548,7 +554,7 @@ bool my_yyoverflow(short **a, YYSTYPE **b,int *yystacksize);
 	literal text_literal insert_ident order_ident
 	simple_ident select_item2 expr opt_expr opt_else sum_expr in_sum_expr
 	table_wild opt_pad no_in_expr expr_expr simple_expr no_and_expr
-	using_list subselect subselect_init
+	using_list param_marker subselect subselect_init
 
 %type <item_list>
 	expr_list udf_expr_list when_list ident_list ident_list_arg
@@ -1720,6 +1726,7 @@ no_and_expr:
 simple_expr:
 	simple_ident
 	| literal
+	| param_marker
 	| '@' ident_or_text SET_VAR expr
 	  { $$= new Item_func_set_user_var($2,$4);
 	    current_thd->safe_to_cache_query=0;
@@ -2795,6 +2802,29 @@ show_param:
 	    if (!add_table_to_list($3,NULL,0))
 	      YYABORT;
 	  }
+	| COLUMN_SYM TYPES_SYM
+	  {
+	    LEX *lex=Lex;
+	    lex->sql_command= SQLCOM_SHOW_COLUMN_TYPES;
+	  }
+	| TABLE_SYM TYPES_SYM
+	  {
+	    LEX *lex=Lex;
+	    lex->sql_command= SQLCOM_SHOW_TABLE_TYPES;
+	  }
+	| PRIVILEGES
+	  {
+	    LEX *lex=Lex;
+	    lex->sql_command= SQLCOM_SHOW_PRIVILEGES;
+	  }
+        | COUNT_SYM '(' '*' ')' WARNINGS 
+          { Lex->sql_command = SQLCOM_SHOW_WARNS_COUNT;}
+        | COUNT_SYM '(' '*' ')' ERRORS 
+          { Lex->sql_command = SQLCOM_SHOW_ERRORS_COUNT;}
+        | WARNINGS {Select->offset_limit=0L;} limit_clause
+          { Lex->sql_command = SQLCOM_SHOW_WARNS;}
+        | ERRORS {Select->offset_limit=0L;} limit_clause
+          { Lex->sql_command = SQLCOM_SHOW_ERRORS;}  
 	| STATUS_SYM wild
 	  { Lex->sql_command= SQLCOM_SHOW_STATUS; }
 	| opt_full PROCESSLIST_SYM
@@ -3055,7 +3085,20 @@ text_string:
 	    Item *tmp = new Item_varbinary($1.str,$1.length,default_charset_info);
 	    $$= tmp ? tmp->val_str((String*) 0) : (String*) 0;
 	  };
-
+param_marker:
+        '?' 
+        {
+          if(current_thd->prepare_command)
+          {     
+            Lex->param_list.push_back($$=new Item_param());      
+            current_thd->param_count++;
+          }
+          else 
+          {
+            yyerror("You have an error in your SQL syntax");
+            YYABORT;
+          }
+        }
 literal:
 	text_literal	{ $$ =	$1; }
 	| NUM		{ $$ =	new Item_int($1.str, (longlong) atol($1.str),$1.length); }
@@ -3411,6 +3454,16 @@ option_value:
 	     YYABORT;
 	 }
 	| SQL_QUERY_CACHE_TYPE_SYM equal query_cache_type
+        | SQL_ERROR_COUNT equal ULONG_NUM
+          {
+            LEX *lex = Lex;
+            lex->thd->max_error_count = $3;
+          }
+        | SQL_WARNING_COUNT equal ULONG_NUM
+          {
+            LEX *lex = Lex;
+            lex->thd->max_warning_count = $3;
+          }
 	| '@' ident_or_text equal expr
 	  {
 	     Item_func_set_user_var *item = new Item_func_set_user_var($2,$4);

sql/structs.h

@@ -152,6 +152,29 @@ struct show_var_st {
   SHOW_TYPE type;
 };
 
+struct show_table_type_st {
+  const char *type;
+  char *value;
+  const char *comment;
+};
+
+struct show_column_type_st {
+  const char *type;
+  uint size;
+  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;
+};
+
 typedef struct lex_string {
   char *str;
   uint length;