/* Copyright (C) 2000-2003 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 */ /* drop and alter of tables */ #include "mysql_priv.h" #ifdef HAVE_BERKELEY_DB #include "ha_berkeley.h" #endif #include <hash.h> #include <myisam.h> #include <my_dir.h> #ifdef __WIN__ #include <io.h> #endif const char *primary_key_name= "PRIMARY"; static bool check_if_keyname_exists(const char *name,KEY *start, KEY *end); static char *make_unique_key_name(const char *field_name,KEY *start,KEY *end); static int copy_data_between_tables(TABLE *from,TABLE *to, List<create_field> &create, enum enum_duplicates handle_duplicates, uint order_num, ORDER *order, ha_rows *copied,ha_rows *deleted); /* delete (drop) tables. SYNOPSIS mysql_rm_table() thd Thread handle tables List of tables to delete if_exists If 1, don't give error if one table doesn't exists NOTES Will delete all tables that can be deleted and give a compact error messages for tables that could not be deleted. If a table is in use, we will wait for all users to free the table before dropping it Wait if global_read_lock (FLUSH TABLES WITH READ LOCK) is set. RETURN 0 ok. In this case ok packet is sent to user -1 Error (Error message given but not sent to user) */ int mysql_rm_table(THD *thd,TABLE_LIST *tables, my_bool if_exists, my_bool drop_temporary) { int error= 0; DBUG_ENTER("mysql_rm_table"); /* mark for close and remove all cached entries */ thd->mysys_var->current_mutex= &LOCK_open; thd->mysys_var->current_cond= &COND_refresh; VOID(pthread_mutex_lock(&LOCK_open)); if (!drop_temporary && global_read_lock) { if (thd->global_read_lock) { my_error(ER_TABLE_NOT_LOCKED_FOR_WRITE,MYF(0), tables->real_name); error= 1; goto err; } while (global_read_lock && ! thd->killed) { (void) pthread_cond_wait(&COND_refresh,&LOCK_open); } } error=mysql_rm_table_part2(thd,tables, if_exists, drop_temporary, 0); err: pthread_mutex_unlock(&LOCK_open); pthread_mutex_lock(&thd->mysys_var->mutex); thd->mysys_var->current_mutex= 0; thd->mysys_var->current_cond= 0; pthread_mutex_unlock(&thd->mysys_var->mutex); if (error) DBUG_RETURN(-1); send_ok(thd); DBUG_RETURN(0); } /* delete (drop) tables. SYNOPSIS mysql_rm_table_part2_with_lock() thd Thread handle tables List of tables to delete if_exists If 1, don't give error if one table doesn't exists dont_log_query Don't write query to log files NOTES Works like documented in mysql_rm_table(), but don't check global_read_lock and don't send_ok packet to server. RETURN 0 ok 1 error */ int mysql_rm_table_part2_with_lock(THD *thd, TABLE_LIST *tables, bool if_exists, bool drop_temporary, bool dont_log_query) { int error; thd->mysys_var->current_mutex= &LOCK_open; thd->mysys_var->current_cond= &COND_refresh; VOID(pthread_mutex_lock(&LOCK_open)); error=mysql_rm_table_part2(thd,tables, if_exists, drop_temporary, dont_log_query); pthread_mutex_unlock(&LOCK_open); pthread_mutex_lock(&thd->mysys_var->mutex); thd->mysys_var->current_mutex= 0; thd->mysys_var->current_cond= 0; pthread_mutex_unlock(&thd->mysys_var->mutex); return error; } /* Execute the drop of a normal or temporary table SYNOPSIS mysql_rm_table_part2() thd Thread handler tables Tables to drop if_exists If set, don't give an error if table doesn't exists. In this case we give an warning of level 'NOTE' drop_temporary Only drop temporary tables dont_log_query Don't log the query TODO: When logging to the binary log, we should log tmp_tables and transactional tables as separate statements if we are in a transaction; This is needed to get these tables into the cached binary log that is only written on COMMIT. The current code only writes DROP statements that only uses temporary tables to the cache binary log. This should be ok on most cases, but not all. RETURN 0 ok 1 Error -1 Thread was killed */ int mysql_rm_table_part2(THD *thd, TABLE_LIST *tables, bool if_exists, bool drop_temporary, bool dont_log_query) { TABLE_LIST *table; char path[FN_REFLEN], *alias; String wrong_tables; int error; bool some_tables_deleted=0, tmp_table_deleted=0, foreign_key_error=0; DBUG_ENTER("mysql_rm_table_part2"); if (lock_table_names(thd, tables)) DBUG_RETURN(1); for (table=tables ; table ; table=table->next) { char *db=table->db; mysql_ha_closeall(thd, table); if (!close_temporary_table(thd, db, table->real_name)) { tmp_table_deleted=1; continue; // removed temporary table } error=0; if (!drop_temporary) { abort_locked_tables(thd,db,table->real_name); while (remove_table_from_cache(thd,db,table->real_name) && !thd->killed) { dropping_tables++; (void) pthread_cond_wait(&COND_refresh,&LOCK_open); dropping_tables--; } drop_locked_tables(thd,db,table->real_name); if (thd->killed) DBUG_RETURN(-1); alias= (lower_case_table_names == 2) ? table->alias : table->real_name; /* remove form file and isam files */ strxmov(path, mysql_data_home, "/", db, "/", alias, reg_ext, NullS); (void) unpack_filename(path,path); } if (drop_temporary || access(path,F_OK)) { if (if_exists) push_warning_printf(thd, MYSQL_ERROR::WARN_LEVEL_NOTE, ER_BAD_TABLE_ERROR, ER(ER_BAD_TABLE_ERROR), table->real_name); else error= 1; } else { char *end; db_type table_type= get_table_type(path); *(end=fn_ext(path))=0; // Remove extension for delete error=ha_delete_table(table_type, path); if (error == ENOENT && if_exists) error = 0; if (error == HA_ERR_ROW_IS_REFERENCED) { /* the table is referenced by a foreign key constraint */ foreign_key_error=1; } if (!error || error == ENOENT) { /* Delete the table definition file */ strmov(end,reg_ext); if (!(error=my_delete(path,MYF(MY_WME)))) some_tables_deleted=1; } } if (error) { if (wrong_tables.length()) wrong_tables.append(','); wrong_tables.append(String(table->real_name,system_charset_info)); } } thd->tmp_table_used= tmp_table_deleted; if (some_tables_deleted || tmp_table_deleted) { query_cache_invalidate3(thd, tables, 0); if (!dont_log_query) { mysql_update_log.write(thd, thd->query,thd->query_length); if (mysql_bin_log.is_open()) { thd->clear_error(); Query_log_event qinfo(thd, thd->query, thd->query_length, tmp_table_deleted && !some_tables_deleted); mysql_bin_log.write(&qinfo); } } } unlock_table_names(thd, tables); error= 0; if (wrong_tables.length()) { if (!foreign_key_error) my_error(ER_BAD_TABLE_ERROR,MYF(0),wrong_tables.c_ptr()); else my_error(ER_ROW_IS_REFERENCED,MYF(0)); error= 1; } DBUG_RETURN(error); } int quick_rm_table(enum db_type base,const char *db, const char *table_name) { char path[FN_REFLEN]; int error=0; (void) sprintf(path,"%s/%s/%s%s",mysql_data_home,db,table_name,reg_ext); unpack_filename(path,path); if (my_delete(path,MYF(0))) error=1; /* purecov: inspected */ sprintf(path,"%s/%s/%s",mysql_data_home,db,table_name); unpack_filename(path,path); return ha_delete_table(base,path) || error; } /* Sort keys in the following order: - PRIMARY KEY - UNIQUE keyws where all column are NOT NULL - Other UNIQUE keys - Normal keys - Fulltext keys This will make checking for duplicated keys faster and ensure that PRIMARY keys are prioritized. */ static int sort_keys(KEY *a, KEY *b) { if (a->flags & HA_NOSAME) { if (!(b->flags & HA_NOSAME)) return -1; if ((a->flags ^ b->flags) & (HA_NULL_PART_KEY | HA_END_SPACE_KEY)) { /* Sort NOT NULL keys before other keys */ return (a->flags & (HA_NULL_PART_KEY | HA_END_SPACE_KEY)) ? 1 : -1; } if (a->name == primary_key_name) return -1; if (b->name == primary_key_name) return 1; } else if (b->flags & HA_NOSAME) return 1; // Prefer b if ((a->flags ^ b->flags) & HA_FULLTEXT) { return (a->flags & HA_FULLTEXT) ? 1 : -1; } /* Prefer original key order. usable_key_parts contains here the original key position. */ return ((a->usable_key_parts < b->usable_key_parts) ? -1 : (a->usable_key_parts > b->usable_key_parts) ? 1 : 0); } /* Check TYPELIB (set or enum) for duplicates SYNOPSIS check_duplicates_in_interval() set_or_name "SET" or "ENUM" string for warning message name name of the checked column typelib list of values for the column DESCRIPTION This function prints an warning for each value in list which has some duplicates on its right RETURN VALUES void */ void check_duplicates_in_interval(const char *set_or_name, const char *name, TYPELIB *typelib) { unsigned int old_count= typelib->count; const char **old_type_names= typelib->type_names; old_count= typelib->count; old_type_names= typelib->type_names; const char **cur_value= typelib->type_names; for ( ; typelib->count > 1; cur_value++) { typelib->type_names++; typelib->count--; if (find_type((char*)*cur_value,typelib,1)) { push_warning_printf(current_thd,MYSQL_ERROR::WARN_LEVEL_NOTE, ER_DUPLICATED_VALUE_IN_TYPE, ER(ER_DUPLICATED_VALUE_IN_TYPE), name,*cur_value,set_or_name); } } typelib->count= old_count; typelib->type_names= old_type_names; } /* Create a table SYNOPSIS mysql_create_table() thd Thread object db Database table_name Table name create_info Create information (like MAX_ROWS) fields List of fields to create keys List of keys to create tmp_table Set to 1 if this is an internal temporary table (From ALTER TABLE) no_log Don't log the query to binary log. DESCRIPTION If one creates a temporary table, this is automaticly opened no_log is needed for the case of CREATE ... SELECT, as the logging will be done later in sql_insert.cc select_field_count is also used for CREATE ... SELECT, and must be zero for standard create of table. RETURN VALUES 0 ok -1 error */ int mysql_create_table(THD *thd,const char *db, const char *table_name, HA_CREATE_INFO *create_info, List<create_field> &fields, List<Key> &keys,bool tmp_table,bool no_log, uint select_field_count) { char path[FN_REFLEN]; const char *key_name, *alias; create_field *sql_field,*dup_field; int error= -1; uint db_options,field,null_fields,blob_columns; ulong pos; KEY *key_info,*key_info_buffer; KEY_PART_INFO *key_part_info; int auto_increment=0; handler *file; int field_no,dup_no; enum db_type new_db_type; DBUG_ENTER("mysql_create_table"); /* Check for duplicate fields and check type of table to create */ if (!fields.elements) { my_error(ER_TABLE_MUST_HAVE_COLUMNS,MYF(0)); DBUG_RETURN(-1); } List_iterator<create_field> it(fields),it2(fields); int select_field_pos=fields.elements - select_field_count; null_fields=blob_columns=0; if ((new_db_type= ha_checktype(create_info->db_type)) != create_info->db_type) { create_info->db_type= new_db_type; push_warning_printf(thd, MYSQL_ERROR::WARN_LEVEL_WARN, ER_WARN_USING_OTHER_HANDLER, ER(ER_WARN_USING_OTHER_HANDLER), ha_get_storage_engine(new_db_type), table_name); } db_options=create_info->table_options; if (create_info->row_type == ROW_TYPE_DYNAMIC) db_options|=HA_OPTION_PACK_RECORD; alias= table_case_name(create_info, table_name); file=get_new_handler((TABLE*) 0, create_info->db_type); if ((create_info->options & HA_LEX_CREATE_TMP_TABLE) && (file->table_flags() & HA_NO_TEMP_TABLES)) { my_error(ER_ILLEGAL_HA,MYF(0),table_name); DBUG_RETURN(-1); } for (field_no=0; (sql_field=it++) ; field_no++) { if (!sql_field->charset) sql_field->charset= create_info->default_table_charset; /* table_charset is set in ALTER TABLE if we want change character set for all varchar/char columns. But the table charset must not affect the BLOB fields, so don't allow to change my_charset_bin to somethig else. */ if (create_info->table_charset && sql_field->charset != &my_charset_bin) sql_field->charset= create_info->table_charset; CHARSET_INFO *savecs= sql_field->charset; if ((sql_field->flags & BINCMP_FLAG) && !(sql_field->charset= get_charset_by_csname(sql_field->charset->csname, MY_CS_BINSORT,MYF(0)))) { char tmp[64]; strmake(strmake(tmp, savecs->csname, sizeof(tmp)-4), "_bin", 4); my_error(ER_UNKNOWN_COLLATION, MYF(0), tmp); DBUG_RETURN(-1); } sql_field->create_length_to_internal_length(); /* Don't pack keys in old tables if the user has requested this */ if ((sql_field->flags & BLOB_FLAG) || sql_field->sql_type == FIELD_TYPE_VAR_STRING && create_info->row_type != ROW_TYPE_FIXED) { db_options|=HA_OPTION_PACK_RECORD; } if (!(sql_field->flags & NOT_NULL_FLAG)) null_fields++; if (check_column_name(sql_field->field_name)) { my_error(ER_WRONG_COLUMN_NAME, MYF(0), sql_field->field_name); DBUG_RETURN(-1); } /* Check if we have used the same field name before */ for (dup_no=0; (dup_field=it2++) != sql_field; dup_no++) { if (my_strcasecmp(system_charset_info, sql_field->field_name, dup_field->field_name) == 0) { /* If this was a CREATE ... SELECT statement, accept a field redefinition if we are changing a field in the SELECT part */ if (field_no < select_field_pos || dup_no >= select_field_pos) { my_error(ER_DUP_FIELDNAME,MYF(0),sql_field->field_name); DBUG_RETURN(-1); } else { /* Field redefined */ sql_field->sql_type= dup_field->sql_type; sql_field->charset= (dup_field->charset ? dup_field->charset : create_info->default_table_charset); sql_field->length= dup_field->length; sql_field->pack_length= dup_field->pack_length; sql_field->create_length_to_internal_length(); sql_field->decimals= dup_field->decimals; sql_field->flags= dup_field->flags; sql_field->unireg_check= dup_field->unireg_check; it2.remove(); // Remove first (create) definition select_field_pos--; break; } } } it2.rewind(); } /* If fixed row records, we need one bit to check for deleted rows */ if (!(db_options & HA_OPTION_PACK_RECORD)) null_fields++; pos=(null_fields+7)/8; it.rewind(); while ((sql_field=it++)) { DBUG_ASSERT(sql_field->charset); switch (sql_field->sql_type) { case FIELD_TYPE_BLOB: case FIELD_TYPE_MEDIUM_BLOB: case FIELD_TYPE_TINY_BLOB: case FIELD_TYPE_LONG_BLOB: sql_field->pack_flag=FIELDFLAG_BLOB | pack_length_to_packflag(sql_field->pack_length - portable_sizeof_char_ptr); if (sql_field->charset->state & MY_CS_BINSORT) sql_field->pack_flag|=FIELDFLAG_BINARY; sql_field->length=8; // Unireg field length sql_field->unireg_check=Field::BLOB_FIELD; blob_columns++; break; case FIELD_TYPE_GEOMETRY: #ifdef HAVE_SPATIAL if (!(file->table_flags() & HA_HAS_GEOMETRY)) { my_printf_error(ER_CHECK_NOT_IMPLEMENTED, ER(ER_CHECK_NOT_IMPLEMENTED), MYF(0), "GEOMETRY"); DBUG_RETURN(-1); } sql_field->pack_flag=FIELDFLAG_GEOM | pack_length_to_packflag(sql_field->pack_length - portable_sizeof_char_ptr); if (sql_field->charset->state & MY_CS_BINSORT) sql_field->pack_flag|=FIELDFLAG_BINARY; sql_field->length=8; // Unireg field length sql_field->unireg_check=Field::BLOB_FIELD; blob_columns++; break; #else my_printf_error(ER_FEATURE_DISABLED,ER(ER_FEATURE_DISABLED), MYF(0), sym_group_geom.name, sym_group_geom.needed_define); DBUG_RETURN(-1); #endif /*HAVE_SPATIAL*/ case FIELD_TYPE_VAR_STRING: case FIELD_TYPE_STRING: sql_field->pack_flag=0; if (sql_field->charset->state & MY_CS_BINSORT) sql_field->pack_flag|=FIELDFLAG_BINARY; break; case FIELD_TYPE_ENUM: sql_field->pack_flag=pack_length_to_packflag(sql_field->pack_length) | FIELDFLAG_INTERVAL; if (sql_field->charset->state & MY_CS_BINSORT) sql_field->pack_flag|=FIELDFLAG_BINARY; sql_field->unireg_check=Field::INTERVAL_FIELD; check_duplicates_in_interval("ENUM",sql_field->field_name, sql_field->interval); break; case FIELD_TYPE_SET: sql_field->pack_flag=pack_length_to_packflag(sql_field->pack_length) | FIELDFLAG_BITFIELD; if (sql_field->charset->state & MY_CS_BINSORT) sql_field->pack_flag|=FIELDFLAG_BINARY; sql_field->unireg_check=Field::BIT_FIELD; check_duplicates_in_interval("SET",sql_field->field_name, sql_field->interval); break; case FIELD_TYPE_DATE: // Rest of string types case FIELD_TYPE_NEWDATE: case FIELD_TYPE_TIME: case FIELD_TYPE_DATETIME: case FIELD_TYPE_NULL: sql_field->pack_flag=f_settype((uint) sql_field->sql_type); break; case FIELD_TYPE_TIMESTAMP: sql_field->unireg_check=Field::TIMESTAMP_FIELD; /* fall through */ default: sql_field->pack_flag=(FIELDFLAG_NUMBER | (sql_field->flags & UNSIGNED_FLAG ? 0 : FIELDFLAG_DECIMAL) | (sql_field->flags & ZEROFILL_FLAG ? FIELDFLAG_ZEROFILL : 0) | f_settype((uint) sql_field->sql_type) | (sql_field->decimals << FIELDFLAG_DEC_SHIFT)); break; } if (!(sql_field->flags & NOT_NULL_FLAG)) sql_field->pack_flag|=FIELDFLAG_MAYBE_NULL; sql_field->offset= pos; if (MTYP_TYPENR(sql_field->unireg_check) == Field::NEXT_NUMBER) auto_increment++; pos+=sql_field->pack_length; } if (auto_increment > 1) { my_error(ER_WRONG_AUTO_KEY,MYF(0)); DBUG_RETURN(-1); } if (auto_increment && (file->table_flags() & HA_NO_AUTO_INCREMENT)) { my_error(ER_TABLE_CANT_HANDLE_AUTO_INCREMENT,MYF(0)); DBUG_RETURN(-1); } if (blob_columns && (file->table_flags() & HA_NO_BLOBS)) { my_error(ER_TABLE_CANT_HANDLE_BLOB,MYF(0)); DBUG_RETURN(-1); } /* Create keys */ List_iterator<Key> key_iterator(keys); uint key_parts=0, key_count=0, fk_key_count=0; List<Key> keys_in_order; // Add new keys here bool primary_key=0,unique_key=0; Key *key; uint tmp, key_number; /* Calculate number of key segements */ while ((key=key_iterator++)) { if (key->type == Key::FOREIGN_KEY) { fk_key_count++; foreign_key *fk_key= (foreign_key*) key; if (fk_key->ref_columns.elements && fk_key->ref_columns.elements != fk_key->columns.elements) { my_error(ER_WRONG_FK_DEF, MYF(0), fk_key->name ? fk_key->name : "foreign key without name", ER(ER_KEY_REF_DO_NOT_MATCH_TABLE_REF)); DBUG_RETURN(-1); } continue; } key_count++; tmp=max(file->max_key_parts(),MAX_REF_PARTS); if (key->columns.elements > tmp) { my_error(ER_TOO_MANY_KEY_PARTS,MYF(0),tmp); DBUG_RETURN(-1); } if (key->name && strlen(key->name) > NAME_LEN) { my_error(ER_TOO_LONG_IDENT, MYF(0), key->name); DBUG_RETURN(-1); } key_parts+=key->columns.elements; if (key->name && !tmp_table && !my_strcasecmp(system_charset_info,key->name,primary_key_name)) { my_error(ER_WRONG_NAME_FOR_INDEX, MYF(0), key->name); DBUG_RETURN(-1); } } tmp=min(file->max_keys(), MAX_KEY); if (key_count > tmp) { my_error(ER_TOO_MANY_KEYS,MYF(0),tmp); DBUG_RETURN(-1); } key_info_buffer=key_info=(KEY*) sql_calloc(sizeof(KEY)*key_count); key_part_info=(KEY_PART_INFO*) sql_calloc(sizeof(KEY_PART_INFO)*key_parts); if (!key_info_buffer || ! key_part_info) DBUG_RETURN(-1); // Out of memory key_iterator.rewind(); key_number=0; for (; (key=key_iterator++) ; key_number++) { uint key_length=0; key_part_spec *column; switch(key->type){ case Key::MULTIPLE: key_info->flags = 0; break; case Key::FULLTEXT: key_info->flags = HA_FULLTEXT; break; case Key::SPATIAL: #ifdef HAVE_SPATIAL key_info->flags = HA_SPATIAL; break; #else my_printf_error(ER_FEATURE_DISABLED,ER(ER_FEATURE_DISABLED),MYF(0), sym_group_geom.name, sym_group_geom.needed_define); DBUG_RETURN(-1); #endif case Key::FOREIGN_KEY: key_number--; // Skip this key continue; default: key_info->flags = HA_NOSAME; } key_info->key_parts=(uint8) key->columns.elements; key_info->key_part=key_part_info; key_info->usable_key_parts= key_number; key_info->algorithm=key->algorithm; if (key->type == Key::FULLTEXT) { if (!(file->table_flags() & HA_CAN_FULLTEXT)) { my_error(ER_TABLE_CANT_HANDLE_FT, MYF(0)); DBUG_RETURN(-1); } } /* Make SPATIAL to be RTREE by default SPATIAL only on BLOB or at least BINARY, this actually should be replaced by special GEOM type in near future when new frm file is ready checking for proper key parts number: */ /* TODO: Add proper checks if handler supports key_type and algorithm */ if (key_info->flags == HA_SPATIAL) { if (key_info->key_parts != 1) { my_printf_error(ER_WRONG_ARGUMENTS, ER(ER_WRONG_ARGUMENTS),MYF(0),"SPATIAL INDEX"); DBUG_RETURN(-1); } } else if (key_info->algorithm == HA_KEY_ALG_RTREE) { #ifdef HAVE_RTREE_KEYS if ((key_info->key_parts & 1) == 1) { my_printf_error(ER_WRONG_ARGUMENTS, ER(ER_WRONG_ARGUMENTS),MYF(0),"RTREE INDEX"); DBUG_RETURN(-1); } /* TODO: To be deleted */ my_printf_error(ER_NOT_SUPPORTED_YET, ER(ER_NOT_SUPPORTED_YET), MYF(0), "RTREE INDEX"); DBUG_RETURN(-1); #else my_printf_error(ER_FEATURE_DISABLED,ER(ER_FEATURE_DISABLED),MYF(0), sym_group_rtree.name, sym_group_rtree.needed_define); DBUG_RETURN(-1); #endif } List_iterator<key_part_spec> cols(key->columns); CHARSET_INFO *ft_key_charset=0; // for FULLTEXT for (uint column_nr=0 ; (column=cols++) ; column_nr++) { it.rewind(); field=0; while ((sql_field=it++) && my_strcasecmp(system_charset_info, column->field_name, sql_field->field_name)) field++; if (!sql_field) { my_printf_error(ER_KEY_COLUMN_DOES_NOT_EXITS, ER(ER_KEY_COLUMN_DOES_NOT_EXITS),MYF(0), column->field_name); DBUG_RETURN(-1); } /* for fulltext keys keyseg length is 1 for blobs (it's ignored in ft code anyway, and 0 (set to column width later) for char's. it has to be correct col width for char's, as char data are not prefixed with length (unlike blobs, where ft code takes data length from a data prefix, ignoring column->length). */ if (key->type == Key::FULLTEXT) { if ((sql_field->sql_type != FIELD_TYPE_STRING && sql_field->sql_type != FIELD_TYPE_VAR_STRING && !f_is_blob(sql_field->pack_flag)) || sql_field->charset == &my_charset_bin || sql_field->charset->state & MY_CS_NONTEXT || // ucs2 doesn't work yet (ft_key_charset && sql_field->charset != ft_key_charset)) { my_printf_error(ER_BAD_FT_COLUMN,ER(ER_BAD_FT_COLUMN),MYF(0), column->field_name); DBUG_RETURN(-1); } ft_key_charset=sql_field->charset; /* for fulltext keys keyseg length is 1 for blobs (it's ignored in ft code anyway, and 0 (set to column width later) for char's. it has to be correct col width for char's, as char data are not prefixed with length (unlike blobs, where ft code takes data length from a data prefix, ignoring column->length). */ column->length=test(f_is_blob(sql_field->pack_flag)); } else { column->length*= sql_field->charset->mbmaxlen; if (f_is_blob(sql_field->pack_flag)) { if (!(file->table_flags() & HA_BLOB_KEY)) { my_printf_error(ER_BLOB_USED_AS_KEY,ER(ER_BLOB_USED_AS_KEY),MYF(0), column->field_name); DBUG_RETURN(-1); } if (!column->length) { my_printf_error(ER_BLOB_KEY_WITHOUT_LENGTH, ER(ER_BLOB_KEY_WITHOUT_LENGTH),MYF(0), column->field_name); DBUG_RETURN(-1); } } #ifdef HAVE_SPATIAL if (key->type == Key::SPATIAL) { if (!column->length ) { /* BAR: 4 is: (Xmin,Xmax,Ymin,Ymax), this is for 2D case Lately we'll extend this code to support more dimensions */ column->length=4*sizeof(double); } } #endif if (!(sql_field->flags & NOT_NULL_FLAG)) { if (key->type == Key::PRIMARY) { /* Implicitly set primary key fields to NOT NULL for ISO conf. */ sql_field->flags|= NOT_NULL_FLAG; sql_field->pack_flag&= ~FIELDFLAG_MAYBE_NULL; } else key_info->flags|= HA_NULL_PART_KEY; if (!(file->table_flags() & HA_NULL_KEY)) { my_printf_error(ER_NULL_COLUMN_IN_INDEX,ER(ER_NULL_COLUMN_IN_INDEX), MYF(0),column->field_name); DBUG_RETURN(-1); } if (key->type == Key::SPATIAL) { my_error(ER_SPATIAL_CANT_HAVE_NULL, MYF(0)); DBUG_RETURN(-1); } } if (MTYP_TYPENR(sql_field->unireg_check) == Field::NEXT_NUMBER) { if (column_nr == 0 || (file->table_flags() & HA_AUTO_PART_KEY)) auto_increment--; // Field is used } } key_part_info->fieldnr= field; key_part_info->offset= (uint16) sql_field->offset; key_part_info->key_type=sql_field->pack_flag; uint length=sql_field->pack_length; if (column->length) { if (f_is_blob(sql_field->pack_flag)) { if ((length=column->length) > file->max_key_length() || length > file->max_key_part_length()) { length=min(file->max_key_length(), file->max_key_part_length()); if (key->type == Key::MULTIPLE) { /* not a critical problem */ char warn_buff[MYSQL_ERRMSG_SIZE]; sprintf(warn_buff,ER(ER_TOO_LONG_KEY),length); push_warning(thd, MYSQL_ERROR::WARN_LEVEL_WARN, ER_TOO_LONG_KEY, warn_buff); } else { my_error(ER_TOO_LONG_KEY,MYF(0),length); DBUG_RETURN(-1); } } } else if (!f_is_geom(sql_field->pack_flag) && (column->length > length || ((f_is_packed(sql_field->pack_flag) || ((file->table_flags() & HA_NO_PREFIX_CHAR_KEYS) && (key_info->flags & HA_NOSAME))) && column->length != length))) { my_error(ER_WRONG_SUB_KEY,MYF(0)); DBUG_RETURN(-1); } else if (!(file->table_flags() & HA_NO_PREFIX_CHAR_KEYS)) length=column->length; } else if (length == 0) { my_printf_error(ER_WRONG_KEY_COLUMN, ER(ER_WRONG_KEY_COLUMN), MYF(0), column->field_name); DBUG_RETURN(-1); } if (length > file->max_key_part_length()) { length=file->max_key_part_length(); if (key->type == Key::MULTIPLE) { /* not a critical problem */ char warn_buff[MYSQL_ERRMSG_SIZE]; sprintf(warn_buff,ER(ER_TOO_LONG_KEY),length); push_warning(thd, MYSQL_ERROR::WARN_LEVEL_WARN, ER_TOO_LONG_KEY, warn_buff); } else { my_error(ER_TOO_LONG_KEY,MYF(0),length); DBUG_RETURN(-1); } } key_part_info->length=(uint16) length; /* Use packed keys for long strings on the first column */ if (!(db_options & HA_OPTION_NO_PACK_KEYS) && (length >= KEY_DEFAULT_PACK_LENGTH && (sql_field->sql_type == FIELD_TYPE_STRING || sql_field->sql_type == FIELD_TYPE_VAR_STRING || sql_field->pack_flag & FIELDFLAG_BLOB))) { if (column_nr == 0 && (sql_field->pack_flag & FIELDFLAG_BLOB)) key_info->flags|= HA_BINARY_PACK_KEY; else key_info->flags|= HA_PACK_KEY; } key_length+=length; key_part_info++; /* Create the key name based on the first column (if not given) */ if (column_nr == 0) { if (key->type == Key::PRIMARY) { if (primary_key) { my_error(ER_MULTIPLE_PRI_KEY,MYF(0)); DBUG_RETURN(-1); } key_name=primary_key_name; primary_key=1; } else if (!(key_name = key->name)) key_name=make_unique_key_name(sql_field->field_name, key_info_buffer,key_info); if (check_if_keyname_exists(key_name,key_info_buffer,key_info)) { my_error(ER_DUP_KEYNAME,MYF(0),key_name); DBUG_RETURN(-1); } key_info->name=(char*) key_name; } } if (!key_info->name || check_column_name(key_info->name)) { my_error(ER_WRONG_NAME_FOR_INDEX, MYF(0), key_info->name); DBUG_RETURN(-1); } if (!(key_info->flags & HA_NULL_PART_KEY)) unique_key=1; key_info->key_length=(uint16) key_length; uint max_key_length= min(file->max_key_length(), MAX_KEY_LENGTH); if (key_length > max_key_length && key->type != Key::FULLTEXT) { my_error(ER_TOO_LONG_KEY,MYF(0),max_key_length); DBUG_RETURN(-1); } key_info++; } if (!unique_key && !primary_key && (file->table_flags() & HA_REQUIRE_PRIMARY_KEY)) { my_error(ER_REQUIRES_PRIMARY_KEY,MYF(0)); DBUG_RETURN(-1); } if (auto_increment > 0) { my_error(ER_WRONG_AUTO_KEY,MYF(0)); DBUG_RETURN(-1); } /* Sort keys in optimized order */ qsort((gptr) key_info_buffer, key_count, sizeof(KEY), (qsort_cmp) sort_keys); /* Check if table exists */ if (create_info->options & HA_LEX_CREATE_TMP_TABLE) { sprintf(path,"%s%s%lx_%lx_%x%s",mysql_tmpdir,tmp_file_prefix, current_pid, thd->thread_id, thd->tmp_table++,reg_ext); create_info->table_options|=HA_CREATE_DELAY_KEY_WRITE; } else (void) sprintf(path,"%s/%s/%s%s",mysql_data_home,db,alias,reg_ext); unpack_filename(path,path); /* Check if table already exists */ if ((create_info->options & HA_LEX_CREATE_TMP_TABLE) && find_temporary_table(thd,db,table_name)) { if (create_info->options & HA_LEX_CREATE_IF_NOT_EXISTS) { create_info->table_existed= 1; // Mark that table existed DBUG_RETURN(0); } my_error(ER_TABLE_EXISTS_ERROR, MYF(0), alias); DBUG_RETURN(-1); } if (wait_if_global_read_lock(thd, 0)) DBUG_RETURN(error); VOID(pthread_mutex_lock(&LOCK_open)); if (!tmp_table && !(create_info->options & HA_LEX_CREATE_TMP_TABLE)) { if (!access(path,F_OK)) { if (create_info->options & HA_LEX_CREATE_IF_NOT_EXISTS) { create_info->table_existed= 1; // Mark that table existed error= 0; } else my_error(ER_TABLE_EXISTS_ERROR,MYF(0),table_name); goto end; } } thd->proc_info="creating table"; create_info->table_existed= 0; // Mark that table is created if (thd->variables.sql_mode & MODE_NO_DIR_IN_CREATE) create_info->data_file_name= create_info->index_file_name= 0; create_info->table_options=db_options; if (rea_create_table(thd, path, create_info, fields, key_count, key_info_buffer)) { /* my_error(ER_CANT_CREATE_TABLE,MYF(0),table_name,my_errno); */ goto end; } if (create_info->options & HA_LEX_CREATE_TMP_TABLE) { /* Open table and put in temporary table list */ if (!(open_temporary_table(thd, path, db, table_name, 1))) { (void) rm_temporary_table(create_info->db_type, path); goto end; } thd->tmp_table_used= 1; } if (!tmp_table && !no_log) { // Must be written before unlock mysql_update_log.write(thd,thd->query, thd->query_length); if (mysql_bin_log.is_open()) { thd->clear_error(); Query_log_event qinfo(thd, thd->query, thd->query_length, test(create_info->options & HA_LEX_CREATE_TMP_TABLE)); mysql_bin_log.write(&qinfo); } } error=0; end: VOID(pthread_mutex_unlock(&LOCK_open)); start_waiting_global_read_lock(thd); thd->proc_info="After create"; DBUG_RETURN(error); } /* ** Give the key name after the first field with an optional '_#' after **/ static bool check_if_keyname_exists(const char *name, KEY *start, KEY *end) { for (KEY *key=start ; key != end ; key++) if (!my_strcasecmp(system_charset_info,name,key->name)) return 1; return 0; } static char * make_unique_key_name(const char *field_name,KEY *start,KEY *end) { char buff[MAX_FIELD_NAME],*buff_end; if (!check_if_keyname_exists(field_name,start,end) && my_strcasecmp(system_charset_info,field_name,primary_key_name)) return (char*) field_name; // Use fieldname buff_end=strmake(buff,field_name,MAX_FIELD_NAME-4); for (uint i=2 ; ; i++) { sprintf(buff_end,"_%d",i); if (!check_if_keyname_exists(buff,start,end)) return sql_strdup(buff); } } /**************************************************************************** ** Create table from a list of fields and items ****************************************************************************/ TABLE *create_table_from_items(THD *thd, HA_CREATE_INFO *create_info, const char *db, const char *name, List<create_field> *extra_fields, List<Key> *keys, List<Item> *items, MYSQL_LOCK **lock) { TABLE tmp_table; // Used during 'create_field()' TABLE *table; tmp_table.table_name=0; uint select_field_count= items->elements; DBUG_ENTER("create_table_from_items"); /* Add selected items to field list */ List_iterator_fast<Item> it(*items); Item *item; Field *tmp_field; tmp_table.db_create_options=0; tmp_table.null_row=tmp_table.maybe_null=0; tmp_table.blob_ptr_size=portable_sizeof_char_ptr; tmp_table.db_low_byte_first= test(create_info->db_type == DB_TYPE_MYISAM || create_info->db_type == DB_TYPE_HEAP); while ((item=it++)) { create_field *cr_field; Field *field; if (item->type() == Item::FUNC_ITEM) field=item->tmp_table_field(&tmp_table); else field=create_tmp_field(thd, &tmp_table, item, item->type(), (Item ***) 0, &tmp_field,0,0); if (!field || !(cr_field=new create_field(field,(item->type() == Item::FIELD_ITEM ? ((Item_field *)item)->field : (Field*) 0)))) DBUG_RETURN(0); extra_fields->push_back(cr_field); } /* create and lock table */ /* QQ: This should be done atomic ! */ if (mysql_create_table(thd,db,name,create_info,*extra_fields, *keys,0,1,select_field_count)) // no logging DBUG_RETURN(0); if (!(table=open_table(thd,db,name,name,(bool*) 0))) { quick_rm_table(create_info->db_type,db,table_case_name(create_info,name)); DBUG_RETURN(0); } table->reginfo.lock_type=TL_WRITE; if (!((*lock)=mysql_lock_tables(thd,&table,1))) { VOID(pthread_mutex_lock(&LOCK_open)); hash_delete(&open_cache,(byte*) table); VOID(pthread_mutex_unlock(&LOCK_open)); quick_rm_table(create_info->db_type,db,table_case_name(create_info, name)); DBUG_RETURN(0); } table->file->extra(HA_EXTRA_WRITE_CACHE); DBUG_RETURN(table); } /**************************************************************************** ** Alter a table definition ****************************************************************************/ bool mysql_rename_table(enum db_type base, const char *old_db, const char *old_name, const char *new_db, const char *new_name) { char from[FN_REFLEN], to[FN_REFLEN]; char tmp_from[NAME_LEN+1], tmp_to[NAME_LEN+1]; handler *file=get_new_handler((TABLE*) 0, base); int error=0; DBUG_ENTER("mysql_rename_table"); if (lower_case_table_names == 2 && !(file->table_flags() & HA_FILE_BASED)) { /* Table handler expects to get all file names as lower case */ strmov(tmp_from, old_name); my_casedn_str(system_charset_info, tmp_from); old_name= tmp_from; strmov(tmp_to, new_name); my_casedn_str(system_charset_info, tmp_to); new_name= tmp_to; } (void) sprintf(from,"%s/%s/%s",mysql_data_home,old_db,old_name); (void) sprintf(to,"%s/%s/%s",mysql_data_home,new_db,new_name); fn_format(from,from,"","",4); fn_format(to,to, "","",4); if (!(error=file->rename_table((const char*) from,(const char *) to))) { if (rename_file_ext(from,to,reg_ext)) { error=my_errno; /* Restore old file name */ file->rename_table((const char*) to,(const char *) from); } } delete file; if (error) my_error(ER_ERROR_ON_RENAME, MYF(0), from, to, error); DBUG_RETURN(error != 0); } /* Force all other threads to stop using the table SYNOPSIS wait_while_table_is_used() thd Thread handler table Table to remove from cache function HA_EXTRA_PREPARE_FOR_DELETE if table is to be deleted HA_EXTRA_FORCE_REOPEN if table is not be used NOTES When returning, the table will be unusable for other threads until the table is closed. PREREQUISITES Lock on LOCK_open Win32 clients must also have a WRITE LOCK on the table ! */ static void wait_while_table_is_used(THD *thd,TABLE *table, enum ha_extra_function function) { DBUG_PRINT("enter",("table: %s", table->real_name)); DBUG_ENTER("wait_while_table_is_used"); safe_mutex_assert_owner(&LOCK_open); VOID(table->file->extra(function)); /* Mark all tables that are in use as 'old' */ mysql_lock_abort(thd, table); // end threads waiting on lock /* Wait until all there are no other threads that has this table open */ while (remove_table_from_cache(thd,table->table_cache_key, table->real_name)) { dropping_tables++; (void) pthread_cond_wait(&COND_refresh,&LOCK_open); dropping_tables--; } DBUG_VOID_RETURN; } /* Close a cached table SYNOPSIS close_cached_table() thd Thread handler table Table to remove from cache NOTES Function ends by signaling threads waiting for the table to try to reopen the table. PREREQUISITES Lock on LOCK_open Win32 clients must also have a WRITE LOCK on the table ! */ static bool close_cached_table(THD *thd, TABLE *table) { DBUG_ENTER("close_cached_table"); wait_while_table_is_used(thd, table, HA_EXTRA_PREPARE_FOR_DELETE); /* Close lock if this is not got with LOCK TABLES */ if (thd->lock) { mysql_unlock_tables(thd, thd->lock); thd->lock=0; // Start locked threads } /* Close all copies of 'table'. This also frees all LOCK TABLES lock */ thd->open_tables=unlink_open_table(thd,thd->open_tables,table); /* When lock on LOCK_open is freed other threads can continue */ pthread_cond_broadcast(&COND_refresh); DBUG_RETURN(0); } static int send_check_errmsg(THD *thd, TABLE_LIST* table, const char* operator_name, const char* errmsg) { Protocol *protocol= thd->protocol; protocol->prepare_for_resend(); protocol->store(table->alias, system_charset_info); protocol->store((char*) operator_name, system_charset_info); protocol->store("error", 5, system_charset_info); protocol->store(errmsg, system_charset_info); thd->net.last_error[0]=0; if (protocol->write()) return -1; return 1; } static int prepare_for_restore(THD* thd, TABLE_LIST* table, HA_CHECK_OPT *check_opt) { DBUG_ENTER("prepare_for_restore"); if (table->table) // do not overwrite existing tables on restore { DBUG_RETURN(send_check_errmsg(thd, table, "restore", "table exists, will not overwrite on restore" )); } else { char* backup_dir= thd->lex->backup_dir; char src_path[FN_REFLEN], dst_path[FN_REFLEN]; char* table_name = table->real_name; char* db = thd->db ? thd->db : table->db; if (fn_format_relative_to_data_home(src_path, table_name, backup_dir, reg_ext)) DBUG_RETURN(-1); // protect buffer overflow sprintf(dst_path, "%s/%s/%s", mysql_real_data_home, db, table_name); if (lock_and_wait_for_table_name(thd,table)) DBUG_RETURN(-1); if (my_copy(src_path, fn_format(dst_path, dst_path,"", reg_ext, 4), MYF(MY_WME))) { pthread_mutex_lock(&LOCK_open); unlock_table_name(thd, table); pthread_mutex_unlock(&LOCK_open); DBUG_RETURN(send_check_errmsg(thd, table, "restore", "Failed copying .frm file")); } if (mysql_truncate(thd, table, 1)) { pthread_mutex_lock(&LOCK_open); unlock_table_name(thd, table); pthread_mutex_unlock(&LOCK_open); DBUG_RETURN(send_check_errmsg(thd, table, "restore", "Failed generating table from .frm file")); } } /* Now we should be able to open the partially restored table to finish the restore in the handler later on */ if (!(table->table = reopen_name_locked_table(thd, table))) { pthread_mutex_lock(&LOCK_open); unlock_table_name(thd, table); pthread_mutex_unlock(&LOCK_open); } DBUG_RETURN(0); } static int prepare_for_repair(THD* thd, TABLE_LIST *table_list, HA_CHECK_OPT *check_opt) { int error= 0; TABLE tmp_table, *table; DBUG_ENTER("prepare_for_repair"); if (!(check_opt->sql_flags & TT_USEFRM)) DBUG_RETURN(0); if (!(table= table_list->table)) /* if open_ltable failed */ { char name[FN_REFLEN]; strxmov(name, mysql_data_home, "/", table_list->db, "/", table_list->real_name, NullS); if (openfrm(name, "", 0, 0, 0, &tmp_table)) DBUG_RETURN(0); // Can't open frm file table= &tmp_table; } /* User gave us USE_FRM which means that the header in the index file is trashed. In this case we will try to fix the table the following way: - Rename the data file to a temporary name - Truncate the table - Replace the new data file with the old one - Run a normal repair using the new index file and the old data file */ char from[FN_REFLEN],tmp[FN_REFLEN+32]; const char **ext= table->file->bas_ext(); MY_STAT stat_info; /* Check if this is a table type that stores index and data separately, like ISAM or MyISAM */ if (!ext[0] || !ext[1]) goto end; // No data file strxmov(from, table->path, ext[1], NullS); // Name of data file if (!my_stat(from, &stat_info, MYF(0))) goto end; // Can't use USE_FRM flag sprintf(tmp,"%s-%lx_%lx", from, current_pid, thd->thread_id); /* If we could open the table, close it */ if (table_list->table) { pthread_mutex_lock(&LOCK_open); close_cached_table(thd, table); pthread_mutex_unlock(&LOCK_open); } if (lock_and_wait_for_table_name(thd,table_list)) { error= -1; goto end; } if (my_rename(from, tmp, MYF(MY_WME))) { pthread_mutex_lock(&LOCK_open); unlock_table_name(thd, table_list); pthread_mutex_unlock(&LOCK_open); error= send_check_errmsg(thd, table_list, "repair", "Failed renaming data file"); goto end; } if (mysql_truncate(thd, table_list, 1)) { pthread_mutex_lock(&LOCK_open); unlock_table_name(thd, table_list); pthread_mutex_unlock(&LOCK_open); error= send_check_errmsg(thd, table_list, "repair", "Failed generating table from .frm file"); goto end; } if (my_rename(tmp, from, MYF(MY_WME))) { pthread_mutex_lock(&LOCK_open); unlock_table_name(thd, table_list); pthread_mutex_unlock(&LOCK_open); error= send_check_errmsg(thd, table_list, "repair", "Failed restoring .MYD file"); goto end; } /* Now we should be able to open the partially repaired table to finish the repair in the handler later on. */ if (!(table_list->table = reopen_name_locked_table(thd, table_list))) { pthread_mutex_lock(&LOCK_open); unlock_table_name(thd, table_list); pthread_mutex_unlock(&LOCK_open); } end: if (table == &tmp_table) closefrm(table); // Free allocated memory DBUG_RETURN(error); } static int mysql_admin_table(THD* thd, TABLE_LIST* tables, HA_CHECK_OPT* check_opt, const char *operator_name, thr_lock_type lock_type, bool open_for_modify, uint extra_open_options, int (*prepare_func)(THD *, TABLE_LIST *, HA_CHECK_OPT *), int (handler::*operator_func) (THD *, HA_CHECK_OPT *)) { TABLE_LIST *table; List<Item> field_list; Item *item; Protocol *protocol= thd->protocol; DBUG_ENTER("mysql_admin_table"); field_list.push_back(item = new Item_empty_string("Table", NAME_LEN*2)); item->maybe_null = 1; field_list.push_back(item = new Item_empty_string("Op", 10)); item->maybe_null = 1; field_list.push_back(item = new Item_empty_string("Msg_type", 10)); item->maybe_null = 1; field_list.push_back(item = new Item_empty_string("Msg_text", 255)); item->maybe_null = 1; if (protocol->send_fields(&field_list, 1)) DBUG_RETURN(-1); mysql_ha_closeall(thd, tables); for (table = tables; table; table = table->next) { char table_name[NAME_LEN*2+2]; char* db = (table->db) ? table->db : thd->db; bool fatal_error=0; strxmov(table_name,db ? db : "",".",table->real_name,NullS); thd->open_options|= extra_open_options; table->table = open_ltable(thd, table, lock_type); #ifdef EMBEDDED_LIBRARY thd->net.last_errno= 0; // these errors shouldn't get client #endif thd->open_options&= ~extra_open_options; if (prepare_func) { switch ((*prepare_func)(thd, table, check_opt)) { case 1: continue; // error, message written to net case -1: goto err; // error, message could be written to net default: ; // should be 0 otherwise } } if (!table->table) { const char *err_msg; protocol->prepare_for_resend(); protocol->store(table_name, system_charset_info); protocol->store(operator_name, system_charset_info); protocol->store("error",5, system_charset_info); if (!(err_msg=thd->net.last_error)) err_msg=ER(ER_CHECK_NO_SUCH_TABLE); protocol->store(err_msg, system_charset_info); thd->net.last_error[0]=0; if (protocol->write()) goto err; continue; } table->table->pos_in_table_list= table; if ((table->table->db_stat & HA_READ_ONLY) && open_for_modify) { char buff[FN_REFLEN + MYSQL_ERRMSG_SIZE]; protocol->prepare_for_resend(); protocol->store(table_name, system_charset_info); protocol->store(operator_name, system_charset_info); protocol->store("error", 5, system_charset_info); sprintf(buff, ER(ER_OPEN_AS_READONLY), table_name); protocol->store(buff, system_charset_info); close_thread_tables(thd); table->table=0; // For query cache if (protocol->write()) goto err; continue; } /* Close all instances of the table to allow repair to rename files */ if (lock_type == TL_WRITE && table->table->version) { pthread_mutex_lock(&LOCK_open); const char *old_message=thd->enter_cond(&COND_refresh, &LOCK_open, "Waiting to get writelock"); mysql_lock_abort(thd,table->table); while (remove_table_from_cache(thd, table->table->table_cache_key, table->table->real_name) && ! thd->killed) { dropping_tables++; (void) pthread_cond_wait(&COND_refresh,&LOCK_open); dropping_tables--; } thd->exit_cond(old_message); pthread_mutex_unlock(&LOCK_open); if (thd->killed) goto err; open_for_modify=0; } int result_code = (table->table->file->*operator_func)(thd, check_opt); #ifdef EMBEDDED_LIBRARY thd->net.last_errno= 0; // these errors shouldn't get client #endif protocol->prepare_for_resend(); protocol->store(table_name, system_charset_info); protocol->store(operator_name, system_charset_info); switch (result_code) { case HA_ADMIN_NOT_IMPLEMENTED: { char buf[ERRMSGSIZE+20]; uint length=my_snprintf(buf, ERRMSGSIZE, ER(ER_CHECK_NOT_IMPLEMENTED), operator_name); protocol->store("error", 5, system_charset_info); protocol->store(buf, length, system_charset_info); } break; case HA_ADMIN_OK: protocol->store("status", 6, system_charset_info); protocol->store("OK",2, system_charset_info); break; case HA_ADMIN_FAILED: protocol->store("status", 6, system_charset_info); protocol->store("Operation failed",16, system_charset_info); break; case HA_ADMIN_REJECT: protocol->store("status", 6, system_charset_info); protocol->store("Operation need committed state",30, system_charset_info); open_for_modify= false; break; case HA_ADMIN_ALREADY_DONE: protocol->store("status", 6, system_charset_info); protocol->store("Table is already up to date", 27, system_charset_info); break; case HA_ADMIN_CORRUPT: protocol->store("error", 5, system_charset_info); protocol->store("Corrupt", 7, system_charset_info); fatal_error=1; break; case HA_ADMIN_INVALID: protocol->store("error", 5, system_charset_info); protocol->store("Invalid argument",16, system_charset_info); break; default: // Probably HA_ADMIN_INTERNAL_ERROR protocol->store("error", 5, system_charset_info); protocol->store("Unknown - internal error during operation", 41 , system_charset_info); fatal_error=1; break; } if (fatal_error) table->table->version=0; // Force close of table else if (open_for_modify) { pthread_mutex_lock(&LOCK_open); remove_table_from_cache(thd, table->table->table_cache_key, table->table->real_name); pthread_mutex_unlock(&LOCK_open); /* May be something modified consequently we have to invalidate cache */ query_cache_invalidate3(thd, table->table, 0); } close_thread_tables(thd); table->table=0; // For query cache if (protocol->write()) goto err; } send_eof(thd); DBUG_RETURN(0); err: close_thread_tables(thd); // Shouldn't be needed if (table) table->table=0; DBUG_RETURN(-1); } int mysql_backup_table(THD* thd, TABLE_LIST* table_list) { DBUG_ENTER("mysql_backup_table"); DBUG_RETURN(mysql_admin_table(thd, table_list, 0, "backup", TL_READ, 0, 0, 0, &handler::backup)); } int mysql_restore_table(THD* thd, TABLE_LIST* table_list) { DBUG_ENTER("mysql_restore_table"); DBUG_RETURN(mysql_admin_table(thd, table_list, 0, "restore", TL_WRITE, 1, 0, &prepare_for_restore, &handler::restore)); } int mysql_repair_table(THD* thd, TABLE_LIST* tables, HA_CHECK_OPT* check_opt) { DBUG_ENTER("mysql_repair_table"); DBUG_RETURN(mysql_admin_table(thd, tables, check_opt, "repair", TL_WRITE, 1, HA_OPEN_FOR_REPAIR, &prepare_for_repair, &handler::repair)); } int mysql_optimize_table(THD* thd, TABLE_LIST* tables, HA_CHECK_OPT* check_opt) { DBUG_ENTER("mysql_optimize_table"); DBUG_RETURN(mysql_admin_table(thd, tables, check_opt, "optimize", TL_WRITE, 1,0,0, &handler::optimize)); } /* Assigned specified indexes for a table into key cache SYNOPSIS mysql_assign_to_keycache() thd Thread object tables Table list (one table only) RETURN VALUES 0 ok -1 error */ int mysql_assign_to_keycache(THD* thd, TABLE_LIST* tables, LEX_STRING *key_cache_name) { HA_CHECK_OPT check_opt; KEY_CACHE *key_cache; DBUG_ENTER("mysql_assign_to_keycache"); check_opt.init(); pthread_mutex_lock(&LOCK_global_system_variables); if (!(key_cache= get_key_cache(key_cache_name))) { pthread_mutex_unlock(&LOCK_global_system_variables); my_error(ER_UNKNOWN_KEY_CACHE, MYF(0), key_cache_name->str); DBUG_RETURN(-1); } pthread_mutex_unlock(&LOCK_global_system_variables); check_opt.key_cache= key_cache; DBUG_RETURN(mysql_admin_table(thd, tables, &check_opt, "assign_to_keycache", TL_READ_NO_INSERT, 0, 0, 0, &handler::assign_to_keycache)); } /* Reassign all tables assigned to a key cache to another key cache SYNOPSIS reassign_keycache_tables() thd Thread object src_cache Reference to the key cache to clean up dest_cache New key cache NOTES This is called when one sets a key cache size to zero, in which case we have to move the tables associated to this key cache to the "default" one. One has to ensure that one never calls this function while some other thread is changing the key cache. This is assured by the caller setting src_cache->in_init before calling this function. We don't delete the old key cache as there may still be pointers pointing to it for a while after this function returns. RETURN VALUES 0 ok */ int reassign_keycache_tables(THD *thd, KEY_CACHE *src_cache, KEY_CACHE *dst_cache) { DBUG_ENTER("reassign_keycache_tables"); DBUG_ASSERT(src_cache != dst_cache); DBUG_ASSERT(src_cache->in_init); src_cache->param_buff_size= 0; // Free key cache ha_resize_key_cache(src_cache); ha_change_key_cache(src_cache, dst_cache); DBUG_RETURN(0); } /* Preload specified indexes for a table into key cache SYNOPSIS mysql_preload_keys() thd Thread object tables Table list (one table only) RETURN VALUES 0 ok -1 error */ int mysql_preload_keys(THD* thd, TABLE_LIST* tables) { DBUG_ENTER("mysql_preload_keys"); DBUG_RETURN(mysql_admin_table(thd, tables, 0, "preload_keys", TL_READ, 0, 0, 0, &handler::preload_keys)); } /* Create a table identical to the specified table SYNOPSIS mysql_create_like_table() thd Thread object table Table list (one table only) create_info Create info table_ident Src table_ident RETURN VALUES 0 ok -1 error */ int mysql_create_like_table(THD* thd, TABLE_LIST* table, HA_CREATE_INFO *create_info, Table_ident *table_ident) { TABLE **tmp_table; char src_path[FN_REFLEN], dst_path[FN_REFLEN]; char *db= table->db; char *table_name= table->real_name; char *src_db= thd->db; char *src_table= table_ident->table.str; int err; DBUG_ENTER("mysql_create_like_table"); /* Validate the source table */ if (table_ident->table.length > NAME_LEN || (table_ident->table.length && check_table_name(src_table,table_ident->table.length)) || table_ident->db.str && check_db_name((src_db= table_ident->db.str))) { my_error(ER_WRONG_TABLE_NAME, MYF(0), src_table); DBUG_RETURN(-1); } if ((tmp_table= find_temporary_table(thd, src_db, src_table))) strxmov(src_path, (*tmp_table)->path, reg_ext, NullS); else { strxmov(src_path, mysql_data_home, "/", src_db, "/", src_table, reg_ext, NullS); if (access(src_path, F_OK)) { my_error(ER_BAD_TABLE_ERROR, MYF(0), src_table); DBUG_RETURN(-1); } } /* Validate the destination table skip the destination table name checking as this is already validated. */ if (create_info->options & HA_LEX_CREATE_TMP_TABLE) { if (find_temporary_table(thd, db, table_name)) goto table_exists; sprintf(dst_path,"%s%s%lx_%lx_%x%s",mysql_tmpdir,tmp_file_prefix, current_pid, thd->thread_id, thd->tmp_table++,reg_ext); create_info->table_options|= HA_CREATE_DELAY_KEY_WRITE; } else { strxmov(dst_path, mysql_data_home, "/", db, "/", table_name, reg_ext, NullS); if (!access(dst_path, F_OK)) goto table_exists; } /* Create a new table by copying from source table */ if (my_copy(src_path, dst_path, MYF(MY_WME))) DBUG_RETURN(-1); /* As mysql_truncate don't work on a new table at this stage of creation, instead create the table directly (for both normal and temporary tables). */ *fn_ext(dst_path)= 0; err= ha_create_table(dst_path, create_info, 1); if (create_info->options & HA_LEX_CREATE_TMP_TABLE) { if (err || !open_temporary_table(thd, dst_path, db, table_name, 1)) { (void) rm_temporary_table(create_info->db_type, dst_path); /* purecov: inspected */ DBUG_RETURN(-1); /* purecov: inspected */ } } else if (err) { (void) quick_rm_table(create_info->db_type, db, table_name); /* purecov: inspected */ DBUG_RETURN(-1); /* purecov: inspected */ } // Must be written before unlock mysql_update_log.write(thd,thd->query, thd->query_length); if (mysql_bin_log.is_open()) { thd->clear_error(); Query_log_event qinfo(thd, thd->query, thd->query_length, test(create_info->options & HA_LEX_CREATE_TMP_TABLE)); mysql_bin_log.write(&qinfo); } DBUG_RETURN(0); table_exists: if (create_info->options & HA_LEX_CREATE_IF_NOT_EXISTS) { char warn_buff[MYSQL_ERRMSG_SIZE]; sprintf(warn_buff,ER(ER_TABLE_EXISTS_ERROR),table_name); push_warning(thd, MYSQL_ERROR::WARN_LEVEL_WARN, ER_TABLE_EXISTS_ERROR,warn_buff); DBUG_RETURN(0); } my_error(ER_TABLE_EXISTS_ERROR, MYF(0), table_name); DBUG_RETURN(-1); } int mysql_analyze_table(THD* thd, TABLE_LIST* tables, HA_CHECK_OPT* check_opt) { #ifdef OS2 thr_lock_type lock_type = TL_WRITE; #else thr_lock_type lock_type = TL_READ_NO_INSERT; #endif DBUG_ENTER("mysql_analyze_table"); DBUG_RETURN(mysql_admin_table(thd, tables, check_opt, "analyze", lock_type, 1,0,0, &handler::analyze)); } int mysql_check_table(THD* thd, TABLE_LIST* tables,HA_CHECK_OPT* check_opt) { #ifdef OS2 thr_lock_type lock_type = TL_WRITE; #else thr_lock_type lock_type = TL_READ_NO_INSERT; #endif DBUG_ENTER("mysql_check_table"); DBUG_RETURN(mysql_admin_table(thd, tables, check_opt, "check", lock_type, 0, HA_OPEN_FOR_REPAIR, 0, &handler::check)); } /* table_list should contain just one table */ int mysql_discard_or_import_tablespace(THD *thd, TABLE_LIST *table_list, enum tablespace_op_type tablespace_op) { TABLE *table; my_bool discard; int error; DBUG_ENTER("mysql_discard_or_import_tablespace"); /* Note that DISCARD/IMPORT TABLESPACE always is the only operation in an ALTER TABLE */ thd->proc_info="discard_or_import_tablespace"; if (tablespace_op == DISCARD_TABLESPACE) discard = TRUE; else discard = FALSE; thd->tablespace_op=TRUE; /* we set this flag so that ha_innobase::open and ::external_lock() do not complain when we lock the table */ mysql_ha_closeall(thd, table_list); if (!(table=open_ltable(thd,table_list,TL_WRITE))) { thd->tablespace_op=FALSE; DBUG_RETURN(-1); } error=table->file->discard_or_import_tablespace(discard); thd->proc_info="end"; if (error) goto err; /* The 0 in the call below means 'not in a transaction', which means immediate invalidation; that is probably what we wish here */ query_cache_invalidate3(thd, table_list, 0); /* The ALTER TABLE is always in its own transaction */ error = ha_commit_stmt(thd); if (ha_commit(thd)) error=1; if (error) goto err; mysql_update_log.write(thd, thd->query,thd->query_length); if (mysql_bin_log.is_open()) { Query_log_event qinfo(thd, thd->query, thd->query_length, 0); mysql_bin_log.write(&qinfo); } err: close_thread_tables(thd); thd->tablespace_op=FALSE; if (error == 0) { send_ok(thd); DBUG_RETURN(0); } DBUG_RETURN(error); } int mysql_alter_table(THD *thd,char *new_db, char *new_name, HA_CREATE_INFO *create_info, TABLE_LIST *table_list, List<create_field> &fields, List<Key> &keys,List<Alter_drop> &drop_list, List<Alter_column> &alter_list, uint order_num, ORDER *order, enum enum_duplicates handle_duplicates, enum enum_enable_or_disable keys_onoff, enum tablespace_op_type tablespace_op, bool simple_alter) { TABLE *table,*new_table; int error; char tmp_name[80],old_name[32],new_name_buff[FN_REFLEN]; char new_alias_buff[FN_REFLEN], *table_name, *db, *new_alias, *alias; char index_file[FN_REFLEN], data_file[FN_REFLEN]; bool use_timestamp=0; ha_rows copied,deleted; ulonglong next_insert_id; uint save_time_stamp,db_create_options, used_fields; enum db_type old_db_type,new_db_type; DBUG_ENTER("mysql_alter_table"); thd->proc_info="init"; table_name=table_list->real_name; alias= (lower_case_table_names == 2) ? table_list->alias : table_name; db=table_list->db; if (!new_db || !my_strcasecmp(table_alias_charset, new_db, db)) { new_db= db; } used_fields=create_info->used_fields; mysql_ha_closeall(thd, table_list); /* DISCARD/IMPORT TABLESPACE is always alone in an ALTER TABLE */ if (tablespace_op != NO_TABLESPACE_OP) DBUG_RETURN(mysql_discard_or_import_tablespace(thd,table_list, tablespace_op)); if (!(table=open_ltable(thd,table_list,TL_WRITE_ALLOW_READ))) DBUG_RETURN(-1); /* Check that we are not trying to rename to an existing table */ if (new_name) { strmov(new_name_buff,new_name); strmov(new_alias= new_alias_buff, new_name); if (lower_case_table_names) { if (lower_case_table_names != 2) { my_casedn_str(system_charset_info, new_name_buff); new_alias= new_name; // Create lower case table name } my_casedn_str(system_charset_info, new_name); } if (new_db == db && !my_strcasecmp(table_alias_charset, new_name_buff, table_name)) { /* Source and destination table names are equal: make later check easier. */ new_alias= new_name= table_name; } else { if (table->tmp_table) { if (find_temporary_table(thd,new_db,new_name_buff)) { my_error(ER_TABLE_EXISTS_ERROR,MYF(0),new_name_buff); DBUG_RETURN(-1); } } else { if (!access(fn_format(new_name_buff,new_name_buff,new_db,reg_ext,0), F_OK)) { /* Table will be closed in do_command() */ my_error(ER_TABLE_EXISTS_ERROR,MYF(0), new_alias); DBUG_RETURN(-1); } } } } else new_alias= new_name= table_name; old_db_type=table->db_type; if (create_info->db_type == DB_TYPE_DEFAULT) create_info->db_type=old_db_type; if ((new_db_type= ha_checktype(create_info->db_type)) != create_info->db_type) { create_info->db_type= new_db_type; push_warning_printf(thd, MYSQL_ERROR::WARN_LEVEL_WARN, ER_WARN_USING_OTHER_HANDLER, ER(ER_WARN_USING_OTHER_HANDLER), ha_get_storage_engine(new_db_type), new_name); } if (create_info->row_type == ROW_TYPE_NOT_USED) create_info->row_type=table->row_type; thd->proc_info="setup"; if (simple_alter && !table->tmp_table) { error=0; if (new_name != table_name || new_db != db) { thd->proc_info="rename"; VOID(pthread_mutex_lock(&LOCK_open)); /* Then do a 'simple' rename of the table */ error=0; if (!access(new_name_buff,F_OK)) { my_error(ER_TABLE_EXISTS_ERROR,MYF(0),new_name); error= -1; } else { *fn_ext(new_name)=0; close_cached_table(thd, table); if (mysql_rename_table(old_db_type,db,table_name,new_db,new_alias)) error= -1; } VOID(pthread_mutex_unlock(&LOCK_open)); } if (!error) { switch (keys_onoff) { case LEAVE_AS_IS: break; case ENABLE: VOID(pthread_mutex_lock(&LOCK_open)); wait_while_table_is_used(thd, table, HA_EXTRA_FORCE_REOPEN); VOID(pthread_mutex_unlock(&LOCK_open)); error= table->file->activate_all_index(thd); /* COND_refresh will be signaled in close_thread_tables() */ break; case DISABLE: if (table->db_type == DB_TYPE_MYISAM) { VOID(pthread_mutex_lock(&LOCK_open)); wait_while_table_is_used(thd, table, HA_EXTRA_FORCE_REOPEN); VOID(pthread_mutex_unlock(&LOCK_open)); table->file->deactivate_non_unique_index(HA_POS_ERROR); /* COND_refresh will be signaled in close_thread_tables() */ } else push_warning_printf(current_thd, MYSQL_ERROR::WARN_LEVEL_WARN, ER_ILLEGAL_HA, ER(ER_ILLEGAL_HA), table->table_name); break; } } if (!error) { mysql_update_log.write(thd, thd->query, thd->query_length); if (mysql_bin_log.is_open()) { thd->clear_error(); Query_log_event qinfo(thd, thd->query, thd->query_length, 0); mysql_bin_log.write(&qinfo); } send_ok(thd); } table_list->table=0; // For query cache query_cache_invalidate3(thd, table_list, 0); DBUG_RETURN(error); } /* Full alter table */ /* let new create options override the old ones */ if (!(used_fields & HA_CREATE_USED_MIN_ROWS)) create_info->min_rows=table->min_rows; if (!(used_fields & HA_CREATE_USED_MAX_ROWS)) create_info->max_rows=table->max_rows; if (!(used_fields & HA_CREATE_USED_AVG_ROW_LENGTH)) create_info->avg_row_length=table->avg_row_length; if (!(used_fields & HA_CREATE_USED_DEFAULT_CHARSET)) create_info->default_table_charset= table->table_charset; restore_record(table,default_values); // Empty record for DEFAULT List_iterator<Alter_drop> drop_it(drop_list); List_iterator<create_field> def_it(fields); List_iterator<Alter_column> alter_it(alter_list); List<create_field> create_list; // Add new fields here List<Key> key_list; // Add new keys here create_field *def; /* First collect all fields from table which isn't in drop_list */ Field **f_ptr,*field; for (f_ptr=table->field ; (field= *f_ptr) ; f_ptr++) { /* Check if field should be droped */ Alter_drop *drop; drop_it.rewind(); while ((drop=drop_it++)) { if (drop->type == Alter_drop::COLUMN && !my_strcasecmp(system_charset_info,field->field_name, drop->name)) { /* Reset auto_increment value if it was dropped */ if (MTYP_TYPENR(field->unireg_check) == Field::NEXT_NUMBER && !(used_fields & HA_CREATE_USED_AUTO)) { create_info->auto_increment_value=0; create_info->used_fields|=HA_CREATE_USED_AUTO; } break; } } if (drop) { drop_it.remove(); continue; } /* Check if field is changed */ def_it.rewind(); while ((def=def_it++)) { if (def->change && !my_strcasecmp(system_charset_info,field->field_name, def->change)) break; } if (def) { // Field is changed def->field=field; if (def->sql_type == FIELD_TYPE_TIMESTAMP) use_timestamp=1; if (!def->after) { create_list.push_back(def); def_it.remove(); } } else { // Use old field value create_list.push_back(def=new create_field(field,field)); if (def->sql_type == FIELD_TYPE_TIMESTAMP) use_timestamp=1; alter_it.rewind(); // Change default if ALTER Alter_column *alter; while ((alter=alter_it++)) { if (!my_strcasecmp(system_charset_info,field->field_name, alter->name)) break; } if (alter) { if (def->sql_type == FIELD_TYPE_BLOB) { my_error(ER_BLOB_CANT_HAVE_DEFAULT,MYF(0),def->change); DBUG_RETURN(-1); } def->def=alter->def; // Use new default alter_it.remove(); } } } def_it.rewind(); List_iterator<create_field> find_it(create_list); while ((def=def_it++)) // Add new columns { if (def->change && ! def->field) { my_error(ER_BAD_FIELD_ERROR,MYF(0),def->change,table_name); DBUG_RETURN(-1); } if (!def->after) create_list.push_back(def); else if (def->after == first_keyword) create_list.push_front(def); else { create_field *find; find_it.rewind(); while ((find=find_it++)) // Add new columns { if (!my_strcasecmp(system_charset_info,def->after, find->field_name)) break; } if (!find) { my_error(ER_BAD_FIELD_ERROR,MYF(0),def->after,table_name); DBUG_RETURN(-1); } find_it.after(def); // Put element after this } } if (alter_list.elements) { my_error(ER_BAD_FIELD_ERROR,MYF(0),alter_list.head()->name,table_name); DBUG_RETURN(-1); } if (!create_list.elements) { my_error(ER_CANT_REMOVE_ALL_FIELDS,MYF(0)); DBUG_RETURN(-1); } /* Collect all keys which isn't in drop list. Add only those for which some fields exists. */ List_iterator<Key> key_it(keys); List_iterator<create_field> field_it(create_list); List<key_part_spec> key_parts; KEY *key_info=table->key_info; for (uint i=0 ; i < table->keys ; i++,key_info++) { char *key_name= key_info->name; Alter_drop *drop; drop_it.rewind(); while ((drop=drop_it++)) { if (drop->type == Alter_drop::KEY && !my_strcasecmp(system_charset_info,key_name, drop->name)) break; } if (drop) { drop_it.remove(); continue; } KEY_PART_INFO *key_part= key_info->key_part; key_parts.empty(); for (uint j=0 ; j < key_info->key_parts ; j++,key_part++) { if (!key_part->field) continue; // Wrong field (from UNIREG) const char *key_part_name=key_part->field->field_name; create_field *cfield; field_it.rewind(); while ((cfield=field_it++)) { if (cfield->change) { if (!my_strcasecmp(system_charset_info, key_part_name, cfield->change)) break; } else if (!my_strcasecmp(system_charset_info, key_part_name, cfield->field_name)) break; } if (!cfield) continue; // Field is removed uint key_part_length=key_part->length; if (cfield->field) // Not new field { // Check if sub key if (cfield->field->type() != FIELD_TYPE_BLOB && (cfield->field->pack_length() == key_part_length || cfield->length <= key_part_length / key_part->field->charset()->mbmaxlen)) key_part_length=0; // Use whole field } key_part_length /= key_part->field->charset()->mbmaxlen; key_parts.push_back(new key_part_spec(cfield->field_name, key_part_length)); } if (key_parts.elements) key_list.push_back(new Key(key_info->flags & HA_SPATIAL ? Key::SPATIAL : (key_info->flags & HA_NOSAME ? (!my_strcasecmp(system_charset_info, key_name, primary_key_name) ? Key::PRIMARY : Key::UNIQUE) : (key_info->flags & HA_FULLTEXT ? Key::FULLTEXT : Key::MULTIPLE)), key_name, key_info->algorithm, key_parts)); } { Key *key; while ((key=key_it++)) // Add new keys { if (key->type != Key::FOREIGN_KEY) key_list.push_back(key); if (key->name && !my_strcasecmp(system_charset_info,key->name,primary_key_name)) { my_error(ER_WRONG_NAME_FOR_INDEX, MYF(0), key->name); DBUG_RETURN(-1); } } } if (drop_list.elements) { my_error(ER_CANT_DROP_FIELD_OR_KEY,MYF(0),drop_list.head()->name); goto err; } if (alter_list.elements) { my_error(ER_CANT_DROP_FIELD_OR_KEY,MYF(0),alter_list.head()->name); goto err; } db_create_options=table->db_create_options & ~(HA_OPTION_PACK_RECORD); (void) sprintf(tmp_name,"%s-%lx_%lx", tmp_file_prefix, current_pid, thd->thread_id); create_info->db_type=new_db_type; if (!create_info->comment) create_info->comment=table->comment; table->file->update_create_info(create_info); if ((create_info->table_options & (HA_OPTION_PACK_KEYS | HA_OPTION_NO_PACK_KEYS)) || (used_fields & HA_CREATE_USED_PACK_KEYS)) db_create_options&= ~(HA_OPTION_PACK_KEYS | HA_OPTION_NO_PACK_KEYS); if (create_info->table_options & (HA_OPTION_CHECKSUM | HA_OPTION_NO_CHECKSUM)) db_create_options&= ~(HA_OPTION_CHECKSUM | HA_OPTION_NO_CHECKSUM); if (create_info->table_options & (HA_OPTION_DELAY_KEY_WRITE | HA_OPTION_NO_DELAY_KEY_WRITE)) db_create_options&= ~(HA_OPTION_DELAY_KEY_WRITE | HA_OPTION_NO_DELAY_KEY_WRITE); create_info->table_options|= db_create_options; if (table->tmp_table) create_info->options|=HA_LEX_CREATE_TMP_TABLE; /* Handling of symlinked tables: If no rename: Create new data file and index file on the same disk as the old data and index files. Copy data. Rename new data file over old data file and new index file over old index file. Symlinks are not changed. If rename: Create new data file and index file on the same disk as the old data and index files. Create also symlinks to point at the new tables. Copy data. At end, rename temporary tables and symlinks to temporary table to final table name. Remove old table and old symlinks If rename is made to another database: Create new tables in new database. Copy data. Remove old table and symlinks. */ if (!strcmp(db, new_db)) // Ignore symlink if db changed { if (create_info->index_file_name) { /* Fix index_file_name to have 'tmp_name' as basename */ strmov(index_file, tmp_name); create_info->index_file_name=fn_same(index_file, create_info->index_file_name, 1); } if (create_info->data_file_name) { /* Fix data_file_name to have 'tmp_name' as basename */ strmov(data_file, tmp_name); create_info->data_file_name=fn_same(data_file, create_info->data_file_name, 1); } } else create_info->data_file_name=create_info->index_file_name=0; if ((error=mysql_create_table(thd, new_db, tmp_name, create_info, create_list,key_list,1,1,0))) // no logging DBUG_RETURN(error); if (table->tmp_table) new_table=open_table(thd,new_db,tmp_name,tmp_name,0); else { char path[FN_REFLEN]; (void) sprintf(path,"%s/%s/%s",mysql_data_home,new_db,tmp_name); fn_format(path,path,"","",4); new_table=open_temporary_table(thd, path, new_db, tmp_name,0); } if (!new_table) { VOID(quick_rm_table(new_db_type,new_db,tmp_name)); goto err; } save_time_stamp=new_table->time_stamp; if (use_timestamp) new_table->time_stamp=0; new_table->next_number_field=new_table->found_next_number_field; thd->count_cuted_fields= CHECK_FIELD_WARN; // calc cuted fields thd->cuted_fields=0L; thd->proc_info="copy to tmp table"; next_insert_id=thd->next_insert_id; // Remember for loggin copied=deleted=0; if (!new_table->is_view) error=copy_data_between_tables(table,new_table,create_list, handle_duplicates, order_num, order, &copied, &deleted); thd->last_insert_id=next_insert_id; // Needed for correct log thd->count_cuted_fields= CHECK_FIELD_IGNORE; new_table->time_stamp=save_time_stamp; if (table->tmp_table) { /* We changed a temporary table */ if (error) { /* The following function call will free the new_table pointer, in close_temporary_table(), so we can safely directly jump to err */ close_temporary_table(thd,new_db,tmp_name); goto err; } /* Close lock if this is a transactional table */ if (thd->lock) { mysql_unlock_tables(thd, thd->lock); thd->lock=0; } /* Remove link to old table and rename the new one */ close_temporary_table(thd,table->table_cache_key,table_name); if (rename_temporary_table(thd, new_table, new_db, new_alias)) { // Fatal error close_temporary_table(thd,new_db,tmp_name); my_free((gptr) new_table,MYF(0)); goto err; } mysql_update_log.write(thd, thd->query,thd->query_length); if (mysql_bin_log.is_open()) { thd->clear_error(); Query_log_event qinfo(thd, thd->query, thd->query_length, 0); mysql_bin_log.write(&qinfo); } goto end_temporary; } intern_close_table(new_table); /* close temporary table */ my_free((gptr) new_table,MYF(0)); VOID(pthread_mutex_lock(&LOCK_open)); if (error) { VOID(quick_rm_table(new_db_type,new_db,tmp_name)); VOID(pthread_mutex_unlock(&LOCK_open)); goto err; } /* Data is copied. Now we rename the old table to a temp name, rename the new one to the old name, remove all entries from the old table from the cash, free all locks, close the old table and remove it. */ thd->proc_info="rename result table"; sprintf(old_name,"%s2-%lx-%lx", tmp_file_prefix, current_pid, thd->thread_id); if (new_name != table_name || new_db != db) { if (!access(new_name_buff,F_OK)) { error=1; my_error(ER_TABLE_EXISTS_ERROR,MYF(0),new_name_buff); VOID(quick_rm_table(new_db_type,new_db,tmp_name)); VOID(pthread_mutex_unlock(&LOCK_open)); goto err; } } #if (!defined( __WIN__) && !defined( __EMX__) && !defined( OS2)) if (table->file->has_transactions()) #endif { /* Win32 and InnoDB can't drop a table that is in use, so we must close the original table at before doing the rename */ table_name=thd->strdup(table_name); // must be saved if (close_cached_table(thd, table)) { // Aborted VOID(quick_rm_table(new_db_type,new_db,tmp_name)); VOID(pthread_mutex_unlock(&LOCK_open)); goto err; } table=0; // Marker that table is closed } #if (!defined( __WIN__) && !defined( __EMX__) && !defined( OS2)) else table->file->extra(HA_EXTRA_FORCE_REOPEN); // Don't use this file anymore #endif error=0; if (mysql_rename_table(old_db_type,db,table_name,db,old_name)) { error=1; VOID(quick_rm_table(new_db_type,new_db,tmp_name)); } else if (mysql_rename_table(new_db_type,new_db,tmp_name,new_db, new_alias)) { // Try to get everything back error=1; VOID(quick_rm_table(new_db_type,new_db,new_alias)); VOID(quick_rm_table(new_db_type,new_db,tmp_name)); VOID(mysql_rename_table(old_db_type,db,old_name,db,alias)); } if (error) { /* This shouldn't happen. We solve this the safe way by closing the locked table. */ if (table) close_cached_table(thd,table); VOID(pthread_mutex_unlock(&LOCK_open)); goto err; } if (thd->lock || new_name != table_name) // True if WIN32 { /* Not table locking or alter table with rename free locks and remove old table */ if (table) close_cached_table(thd,table); VOID(quick_rm_table(old_db_type,db,old_name)); } else { /* Using LOCK TABLES without rename. This code is never executed on WIN32! Remove old renamed table, reopen table and get new locks */ if (table) { VOID(table->file->extra(HA_EXTRA_FORCE_REOPEN)); // Use new file remove_table_from_cache(thd,db,table_name); // Mark all in-use copies old mysql_lock_abort(thd,table); // end threads waiting on lock } VOID(quick_rm_table(old_db_type,db,old_name)); if (close_data_tables(thd,db,table_name) || reopen_tables(thd,1,0)) { // This shouldn't happen if (table) close_cached_table(thd,table); // Remove lock for table VOID(pthread_mutex_unlock(&LOCK_open)); goto err; } } /* The ALTER TABLE is always in its own transaction */ error = ha_commit_stmt(thd); if (ha_commit(thd)) error=1; if (error) { VOID(pthread_mutex_unlock(&LOCK_open)); VOID(pthread_cond_broadcast(&COND_refresh)); goto err; } thd->proc_info="end"; mysql_update_log.write(thd, thd->query,thd->query_length); if (mysql_bin_log.is_open()) { thd->clear_error(); Query_log_event qinfo(thd, thd->query, thd->query_length, 0); mysql_bin_log.write(&qinfo); } VOID(pthread_cond_broadcast(&COND_refresh)); VOID(pthread_mutex_unlock(&LOCK_open)); #ifdef HAVE_BERKELEY_DB if (old_db_type == DB_TYPE_BERKELEY_DB) { /* For the alter table to be properly flushed to the logs, we have to open the new table. If not, we get a problem on server shutdown. */ char path[FN_REFLEN]; (void) sprintf(path,"%s/%s/%s",mysql_data_home,new_db,table_name); fn_format(path,path,"","",4); table=open_temporary_table(thd, path, new_db, tmp_name,0); if (table) { intern_close_table(table); my_free((char*) table, MYF(0)); } else sql_print_error("Warning: Could not open BDB table %s.%s after rename\n", new_db,table_name); (void) berkeley_flush_logs(); } #endif table_list->table=0; // For query cache query_cache_invalidate3(thd, table_list, 0); end_temporary: sprintf(tmp_name, ER(ER_INSERT_INFO), (ulong) (copied + deleted), (ulong) deleted, (ulong) thd->cuted_fields); send_ok(thd,copied+deleted,0L,tmp_name); thd->some_tables_deleted=0; DBUG_RETURN(0); err: DBUG_RETURN(-1); } static int copy_data_between_tables(TABLE *from,TABLE *to, List<create_field> &create, enum enum_duplicates handle_duplicates, uint order_num, ORDER *order, ha_rows *copied, ha_rows *deleted) { int error; Copy_field *copy,*copy_end; ulong found_count,delete_count; THD *thd= current_thd; uint length; SORT_FIELD *sortorder; READ_RECORD info; Field *next_field; TABLE_LIST tables; List<Item> fields; List<Item> all_fields; ha_rows examined_rows; DBUG_ENTER("copy_data_between_tables"); if (!(copy= new Copy_field[to->fields])) DBUG_RETURN(-1); /* purecov: inspected */ to->file->external_lock(thd,F_WRLCK); to->file->extra(HA_EXTRA_WRITE_CACHE); from->file->info(HA_STATUS_VARIABLE); to->file->deactivate_non_unique_index(from->file->records); List_iterator<create_field> it(create); create_field *def; copy_end=copy; for (Field **ptr=to->field ; *ptr ; ptr++) { def=it++; if (def->field) (copy_end++)->set(*ptr,def->field,0); } found_count=delete_count=0; if (order) { from->sort.io_cache=(IO_CACHE*) my_malloc(sizeof(IO_CACHE), MYF(MY_FAE | MY_ZEROFILL)); bzero((char*) &tables,sizeof(tables)); tables.table = from; tables.alias = tables.real_name= from->real_name; tables.db = from->table_cache_key; error=1; if (thd->lex->select_lex.setup_ref_array(thd, order_num) || setup_order(thd, thd->lex->select_lex.ref_pointer_array, &tables, fields, all_fields, order) || !(sortorder=make_unireg_sortorder(order, &length)) || (from->sort.found_records = filesort(thd, from, sortorder, length, (SQL_SELECT *) 0, HA_POS_ERROR, &examined_rows)) == HA_POS_ERROR) goto err; }; /* Turn off recovery logging since rollback of an alter table is to delete the new table so there is no need to log the changes to it. */ error = ha_recovery_logging(thd,FALSE); if (error) { error = 1; goto err; } init_read_record(&info, thd, from, (SQL_SELECT *) 0, 1,1); if (handle_duplicates == DUP_IGNORE || handle_duplicates == DUP_REPLACE) to->file->extra(HA_EXTRA_IGNORE_DUP_KEY); next_field=to->next_number_field; thd->row_count= 0; while (!(error=info.read_record(&info))) { if (thd->killed) { my_error(ER_SERVER_SHUTDOWN,MYF(0)); error= 1; break; } thd->row_count++; if (next_field) next_field->reset(); for (Copy_field *copy_ptr=copy ; copy_ptr != copy_end ; copy_ptr++) copy_ptr->do_copy(copy_ptr); if ((error=to->file->write_row((byte*) to->record[0]))) { if ((handle_duplicates != DUP_IGNORE && handle_duplicates != DUP_REPLACE) || (error != HA_ERR_FOUND_DUPP_KEY && error != HA_ERR_FOUND_DUPP_UNIQUE)) { to->file->print_error(error,MYF(0)); break; } delete_count++; } else found_count++; } end_read_record(&info); free_io_cache(from); delete [] copy; // This is never 0 uint tmp_error; if ((tmp_error=to->file->extra(HA_EXTRA_NO_CACHE))) { to->file->print_error(tmp_error,MYF(0)); error=1; } to->file->extra(HA_EXTRA_NO_IGNORE_DUP_KEY); if (to->file->activate_all_index(thd)) error=1; tmp_error = ha_recovery_logging(thd,TRUE); /* Ensure that the new table is saved properly to disk so that we can do a rename */ if (ha_commit_stmt(thd)) error=1; if (ha_commit(thd)) error=1; if (to->file->external_lock(thd,F_UNLCK)) error=1; err: free_io_cache(from); *copied= found_count; *deleted=delete_count; DBUG_RETURN(error > 0 ? -1 : 0); } int mysql_checksum_table(THD *thd, TABLE_LIST *tables, HA_CHECK_OPT *check_opt) { TABLE_LIST *table; List<Item> field_list; Item *item; Protocol *protocol= thd->protocol; DBUG_ENTER("mysql_checksum_table"); field_list.push_back(item = new Item_empty_string("Table", NAME_LEN*2)); item->maybe_null= 1; field_list.push_back(item=new Item_int("Checksum",(longlong) 1,21)); item->maybe_null= 1; if (protocol->send_fields(&field_list, 1)) DBUG_RETURN(-1); for (table= tables; table; table= table->next) { char table_name[NAME_LEN*2+2]; TABLE *t; strxmov(table_name, table->db ,".", table->real_name, NullS); t= table->table= open_ltable(thd, table, TL_READ_NO_INSERT); thd->clear_error(); // these errors shouldn't get client protocol->prepare_for_resend(); protocol->store(table_name, system_charset_info); if (!t) { /* Table didn't exist */ protocol->store_null(); thd->net.last_error[0]=0; } else { t->pos_in_table_list= table; if (t->file->table_flags() & HA_HAS_CHECKSUM && !(check_opt->flags & T_EXTEND)) protocol->store((ulonglong)t->file->checksum()); else if (!(t->file->table_flags() & HA_HAS_CHECKSUM) && (check_opt->flags & T_QUICK)) protocol->store_null(); else { /* calculating table's checksum */ ha_checksum crc= 0; /* InnoDB must be told explicitly to retrieve all columns, because this function does not set field->query_id in the columns to the current query id */ t->file->extra(HA_EXTRA_RETRIEVE_ALL_COLS); if (t->file->rnd_init(1)) protocol->store_null(); else { while (!t->file->rnd_next(t->record[0])) { ha_checksum row_crc= 0; if (t->record[0] != (byte*) t->field[0]->ptr) row_crc= my_checksum(row_crc, t->record[0], ((byte*) t->field[0]->ptr) - t->record[0]); for (uint i= 0; i < t->fields; i++ ) { Field *f= t->field[i]; if (f->type() == FIELD_TYPE_BLOB) { String tmp; f->val_str(&tmp,&tmp); row_crc= my_checksum(row_crc, (byte*) tmp.ptr(), tmp.length()); } else row_crc= my_checksum(row_crc, (byte*) f->ptr, f->pack_length()); } crc+= row_crc; } protocol->store((ulonglong)crc); } } thd->clear_error(); close_thread_tables(thd); table->table=0; // For query cache } if (protocol->write()) goto err; } send_eof(thd); DBUG_RETURN(0); err: close_thread_tables(thd); // Shouldn't be needed if (table) table->table=0; DBUG_RETURN(-1); }