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mariadb/sql/sql_table.cc
unknown 04ed04461c Making old tables seen with "#mysql50#" prefix, 
which makes it possible to run RENAME TABLE
  on old tables when upgrading from 5.0.
  TODO: A stored procedure to rename all tables and
  databases with old name format into new format,
  it will simplify upgrade.
sql_table.cc:
  Making old tables seen with "#mysql50#" prefix.
  Adding warning into .err log when an old name is found.
sql_show.cc:
  Skip non-directories before filename_to_tablename
  call, to avoid unnecessary warnings.
strfunc.cc:
  Adding "error" argument to strconvert()
mysql_priv.h:
  Adding "error" agrument to strconvert()


sql/mysql_priv.h:
  Adding "error" agrument to strconvert()
sql/strfunc.cc:
  Adding "error" argument to strconvert()
sql/sql_show.cc:
  Skip non-directories before filename_to_tablename
  call, to avoid warning.
sql/sql_table.cc:
  Making old tables seen with "#mysql50#" prefix,
  which makes it possible to run RENAME TABLE
  on old tables.
  Adding warning into .err log when an old name is found.
2005-12-31 12:34:39 +04:00

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/* Copyright (C) 2000-2004 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"
#include <hash.h>
#include <myisam.h>
#include <my_dir.h>
#include "sp_head.h"
#include "sql_trigger.h"
#include "sql_show.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,
bool ignore,
uint order_num, ORDER *order,
ha_rows *copied,ha_rows *deleted);
static bool prepare_blob_field(THD *thd, create_field *sql_field);
static bool check_engine(THD *thd, const char *table_name,
handlerton **new_engine);
/*
SYNOPSIS
write_bin_log()
thd Thread object
clear_error is clear_error to be called
RETURN VALUES
NONE
DESCRIPTION
Write the binlog if open, routine used in multiple places in this
file
*/
static void write_bin_log(THD *thd, bool clear_error,
char const* query, ulong query_length)
{
if (mysql_bin_log.is_open())
{
if (clear_error)
thd->clear_error();
thd->binlog_query(THD::STMT_QUERY_TYPE,
query, query_length, FALSE, FALSE);
}
}
/*
SYNOPSIS
abort_and_upgrade_lock()
thd Thread object
table Table object
db Database name
table_name Table name
old_lock_level Old lock level
RETURN VALUES
TRUE Failure
FALSE Success
DESCRIPTION
Remember old lock level (for possible downgrade later on), abort all
waiting threads and ensure that all keeping locks currently are
completed such that we own the lock exclusively and no other interaction
is ongoing.
*/
static bool abort_and_upgrade_lock(THD *thd, TABLE *table, const char *db,
const char *table_name,
uint *old_lock_level)
{
uint flags= RTFC_WAIT_OTHER_THREAD_FLAG | RTFC_CHECK_KILLED_FLAG;
DBUG_ENTER("abort_and_upgrade_locks");
*old_lock_level= table->reginfo.lock_type;
mysql_lock_abort(thd, table);
VOID(remove_table_from_cache(thd, db, table_name, flags));
if (thd->killed)
{
thd->no_warnings_for_error= 0;
DBUG_RETURN(TRUE);
}
DBUG_RETURN(FALSE);
}
#define MYSQL50_TABLE_NAME_PREFIX "#mysql50#"
#define MYSQL50_TABLE_NAME_PREFIX_LENGTH 9
uint filename_to_tablename(const char *from, char *to, uint to_length)
{
uint errors, res= strconvert(&my_charset_filename, from,
system_charset_info, to, to_length, &errors);
if (errors) // Old 5.0 name
{
res= strxnmov(to, to_length, MYSQL50_TABLE_NAME_PREFIX, from, NullS) - to;
sql_print_error("Invalid (old?) table or database name '%s'", from);
/*
TODO: add a stored procedure for fix table and database names,
and mention its name in error log.
*/
}
return res;
}
uint tablename_to_filename(const char *from, char *to, uint to_length)
{
uint errors;
if (from[0] && !strncmp(from, MYSQL50_TABLE_NAME_PREFIX,
MYSQL50_TABLE_NAME_PREFIX_LENGTH))
return my_snprintf(to, to_length, "%s", from + 9);
return strconvert(system_charset_info, from,
&my_charset_filename, to, to_length, &errors);
}
/*
Creates path to a file: mysql_data_dir/db/table.ext
SYNOPSIS
build_table_filename()
buff where to write result
bufflen buff size
db database name, in system_charset_info
table table name, in system_charset_info
ext file extension
NOTES
Uses database and table name, and extension to create
a file name in mysql_data_dir. Database and table
names are converted from system_charset_info into "fscs".
'ext' is not converted.
RETURN
*/
uint build_table_filename(char *buff, size_t bufflen, const char *db,
const char *table, const char *ext)
{
uint length;
char dbbuff[FN_REFLEN];
char tbbuff[FN_REFLEN];
VOID(tablename_to_filename(table, tbbuff, sizeof(tbbuff)));
VOID(tablename_to_filename(db, dbbuff, sizeof(dbbuff)));
strxnmov(buff, bufflen,
mysql_data_home, "/", dbbuff, "/", tbbuff, ext, NullS);
length= unpack_filename(buff, buff);
return length;
}
uint build_tmptable_filename(char *buff, size_t bufflen,
const char *tmpdir,
const char *table, const char *ext)
{
uint length;
char tbbuff[FN_REFLEN];
VOID(tablename_to_filename(table, tbbuff, sizeof(tbbuff)));
strxnmov(buff, bufflen, tmpdir, "/", tbbuff, ext, NullS);
length= unpack_filename(buff, buff);
return length;
}
/*
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
FALSE OK. In this case ok packet is sent to user
TRUE Error
*/
bool mysql_rm_table(THD *thd,TABLE_LIST *tables, my_bool if_exists,
my_bool drop_temporary)
{
bool error= FALSE, need_start_waiters= FALSE;
DBUG_ENTER("mysql_rm_table");
/* mark for close and remove all cached entries */
if (!drop_temporary)
{
if ((error= wait_if_global_read_lock(thd, 0, 1)))
{
my_error(ER_TABLE_NOT_LOCKED_FOR_WRITE, MYF(0), tables->table_name);
DBUG_RETURN(TRUE);
}
else
need_start_waiters= TRUE;
}
/*
Acquire LOCK_open after wait_if_global_read_lock(). If we would hold
LOCK_open during wait_if_global_read_lock(), other threads could not
close their tables. This would make a pretty deadlock.
*/
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, 0, 0);
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 (need_start_waiters)
start_waiting_global_read_lock(thd);
if (error)
DBUG_RETURN(TRUE);
send_ok(thd);
DBUG_RETURN(FALSE);
}
/*
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. This will also not
generate warnings if the handler files doesn't exists
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, 1,
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
drop_view Allow to delete VIEW .frm
dont_log_query Don't write query to log files. This will also not
generate warnings if the handler files doesn't exists
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 drop_view,
bool dont_log_query)
{
TABLE_LIST *table;
char path[FN_REFLEN], *alias;
uint path_length;
String wrong_tables;
int error;
int non_temp_tables_count= 0;
bool some_tables_deleted=0, tmp_table_deleted=0, foreign_key_error=0;
String built_query;
DBUG_ENTER("mysql_rm_table_part2");
if (binlog_row_based && !dont_log_query)
{
built_query.set_charset(system_charset_info);
if (if_exists)
built_query.append("DROP TABLE IF EXISTS ");
else
built_query.append("DROP TABLE ");
}
/*
If we have the table in the definition cache, we don't have to check the
.frm file to find if the table is a normal table (not view) and what
engine to use.
*/
for (table= tables; table; table= table->next_local)
{
TABLE_SHARE *share;
table->db_type= NULL;
if ((share= get_cached_table_share(table->db, table->table_name)))
table->db_type= share->db_type;
}
if (lock_table_names(thd, tables))
DBUG_RETURN(1);
/* Don't give warnings for not found errors, as we already generate notes */
thd->no_warnings_for_error= 1;
for (table= tables; table; table= table->next_local)
{
char *db=table->db;
handlerton *table_type;
enum legacy_db_type frm_db_type;
mysql_ha_flush(thd, table, MYSQL_HA_CLOSE_FINAL, TRUE);
if (!close_temporary_table(thd, table))
{
tmp_table_deleted=1;
continue; // removed temporary table
}
/*
If row-based replication is used and the table is not a
temporary table, we add the table name to the drop statement
being built. The string always end in a comma and the comma
will be chopped off before being written to the binary log.
*/
if (binlog_row_based && !dont_log_query)
{
++non_temp_tables_count;
/*
Don't write the database name if it is the current one (or if
thd->db is NULL).
*/
built_query.append("`");
if (thd->db == NULL || strcmp(db,thd->db) != 0)
{
built_query.append(db);
built_query.append("`.`");
}
built_query.append(table->table_name);
built_query.append("`,");
}
error=0;
table_type= table->db_type;
if (!drop_temporary)
{
abort_locked_tables(thd, db, table->table_name);
remove_table_from_cache(thd, db, table->table_name,
RTFC_WAIT_OTHER_THREAD_FLAG |
RTFC_CHECK_KILLED_FLAG);
drop_locked_tables(thd, db, table->table_name);
if (thd->killed)
{
thd->no_warnings_for_error= 0;
DBUG_RETURN(-1);
}
alias= (lower_case_table_names == 2) ? table->alias : table->table_name;
/* remove .frm file and engine files */
path_length= build_table_filename(path, sizeof(path),
db, alias, reg_ext);
}
if (table_type == NULL &&
(drop_temporary ||
(access(path, F_OK) &&
ha_create_table_from_engine(thd, db, alias)) ||
(!drop_view &&
mysql_frm_type(thd, path, &frm_db_type) != FRMTYPE_TABLE)))
{
// Table was not found on disk and table can't be created from engine
if (if_exists)
push_warning_printf(thd, MYSQL_ERROR::WARN_LEVEL_NOTE,
ER_BAD_TABLE_ERROR, ER(ER_BAD_TABLE_ERROR),
table->table_name);
else
error= 1;
}
else
{
char *end;
if (table_type == NULL)
{
mysql_frm_type(thd, path, &frm_db_type);
table_type= ha_resolve_by_legacy_type(thd, frm_db_type);
}
// Remove extension for delete
*(end= path + path_length - reg_ext_length)= '\0';
error= ha_delete_table(thd, table_type, path, db, table->table_name,
!dont_log_query);
if ((error == ENOENT || error == HA_ERR_NO_SUCH_TABLE) &&
(if_exists || table_type == NULL))
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 || error == HA_ERR_NO_SUCH_TABLE)
{
int new_error;
/* Delete the table definition file */
strmov(end,reg_ext);
if (!(new_error=my_delete(path,MYF(MY_WME))))
{
some_tables_deleted=1;
new_error= Table_triggers_list::drop_all_triggers(thd, db,
table->table_name);
}
error|= new_error;
}
}
if (error)
{
if (wrong_tables.length())
wrong_tables.append(',');
wrong_tables.append(String(table->table_name,system_charset_info));
}
}
thd->tmp_table_used= tmp_table_deleted;
error= 0;
if (wrong_tables.length())
{
if (!foreign_key_error)
my_printf_error(ER_BAD_TABLE_ERROR, ER(ER_BAD_TABLE_ERROR), MYF(0),
wrong_tables.c_ptr());
else
my_message(ER_ROW_IS_REFERENCED, ER(ER_ROW_IS_REFERENCED), MYF(0));
error= 1;
}
if (some_tables_deleted || tmp_table_deleted || !error)
{
query_cache_invalidate3(thd, tables, 0);
if (!dont_log_query)
{
if (!binlog_row_based ||
non_temp_tables_count > 0 && !tmp_table_deleted)
{
/*
In this case, we are either using statement-based
replication or using row-based replication but have only
deleted one or more non-temporary tables (and no temporary
tables). In this case, we can write the original query into
the binary log.
*/
write_bin_log(thd, !error, thd->query, thd->query_length);
}
else if (binlog_row_based &&
non_temp_tables_count > 0 &&
tmp_table_deleted)
{
/*
In this case we have deleted both temporary and
non-temporary tables, so:
- since we have deleted a non-temporary table we have to
binlog the statement, but
- since we have deleted a temporary table we cannot binlog
the statement (since the table has not been created on the
slave, this might cause the slave to stop).
Instead, we write a built statement, only containing the
non-temporary tables, to the binary log
*/
built_query.chop(); // Chop of the last comma
built_query.append(" /* generated by server */");
write_bin_log(thd, !error, built_query.ptr(), built_query.length());
}
/*
The remaining cases are:
- no tables where deleted and
- only temporary tables where deleted and row-based
replication is used.
In both these cases, nothing should be written to the binary
log.
*/
}
}
unlock_table_names(thd, tables, (TABLE_LIST*) 0);
thd->no_warnings_for_error= 0;
DBUG_RETURN(error);
}
bool quick_rm_table(handlerton *base,const char *db,
const char *table_name)
{
char path[FN_REFLEN];
bool error= 0;
DBUG_ENTER("quick_rm_table");
uint path_length= build_table_filename(path, sizeof(path),
db, table_name, reg_ext);
if (my_delete(path,MYF(0)))
error= 1; /* purecov: inspected */
path[path_length - reg_ext_length]= '\0'; // Remove reg_ext
DBUG_RETURN(ha_delete_table(current_thd, base, path, db, table_name, 0) ||
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,
CHARSET_INFO *cs)
{
TYPELIB tmp= *typelib;
const char **cur_value= typelib->type_names;
unsigned int *cur_length= typelib->type_lengths;
for ( ; tmp.count > 1; cur_value++, cur_length++)
{
tmp.type_names++;
tmp.type_lengths++;
tmp.count--;
if (find_type2(&tmp, (const char*)*cur_value, *cur_length, cs))
{
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);
}
}
}
/*
Check TYPELIB (set or enum) max and total lengths
SYNOPSIS
calculate_interval_lengths()
cs charset+collation pair of the interval
typelib list of values for the column
max_length length of the longest item
tot_length sum of the item lengths
DESCRIPTION
After this function call:
- ENUM uses max_length
- SET uses tot_length.
RETURN VALUES
void
*/
void calculate_interval_lengths(CHARSET_INFO *cs, TYPELIB *interval,
uint32 *max_length, uint32 *tot_length)
{
const char **pos;
uint *len;
*max_length= *tot_length= 0;
for (pos= interval->type_names, len= interval->type_lengths;
*pos ; pos++, len++)
{
uint length= cs->cset->numchars(cs, *pos, *pos + *len);
*tot_length+= length;
set_if_bigger(*max_length, (uint32)length);
}
}
/*
Prepare a create_table instance for packing
SYNOPSIS
prepare_create_field()
sql_field field to prepare for packing
blob_columns count for BLOBs
timestamps count for timestamps
table_flags table flags
DESCRIPTION
This function prepares a create_field instance.
Fields such as pack_flag are valid after this call.
RETURN VALUES
0 ok
1 Error
*/
int prepare_create_field(create_field *sql_field,
uint *blob_columns,
int *timestamps, int *timestamps_with_niladic,
uint table_flags)
{
DBUG_ENTER("prepare_field");
/*
This code came from mysql_prepare_table.
Indent preserved to make patching easier
*/
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 (!(table_flags & HA_CAN_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 MYSQL_TYPE_VARCHAR:
#ifndef QQ_ALL_HANDLERS_SUPPORT_VARCHAR
if (table_flags & HA_NO_VARCHAR)
{
/* convert VARCHAR to CHAR because handler is not yet up to date */
sql_field->sql_type= MYSQL_TYPE_VAR_STRING;
sql_field->pack_length= calc_pack_length(sql_field->sql_type,
(uint) sql_field->length);
if ((sql_field->length / sql_field->charset->mbmaxlen) >
MAX_FIELD_CHARLENGTH)
{
my_printf_error(ER_TOO_BIG_FIELDLENGTH, ER(ER_TOO_BIG_FIELDLENGTH),
MYF(0), sql_field->field_name, MAX_FIELD_CHARLENGTH);
DBUG_RETURN(1);
}
}
#endif
/* fall through */
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,
sql_field->charset);
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,
sql_field->charset);
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_BIT:
/*
We have sql_field->pack_flag already set here, see mysql_prepare_table().
*/
break;
case FIELD_TYPE_NEWDECIMAL:
sql_field->pack_flag=(FIELDFLAG_NUMBER |
(sql_field->flags & UNSIGNED_FLAG ? 0 :
FIELDFLAG_DECIMAL) |
(sql_field->flags & ZEROFILL_FLAG ?
FIELDFLAG_ZEROFILL : 0) |
(sql_field->decimals << FIELDFLAG_DEC_SHIFT));
break;
case FIELD_TYPE_TIMESTAMP:
/* We should replace old TIMESTAMP fields with their newer analogs */
if (sql_field->unireg_check == Field::TIMESTAMP_OLD_FIELD)
{
if (!*timestamps)
{
sql_field->unireg_check= Field::TIMESTAMP_DNUN_FIELD;
(*timestamps_with_niladic)++;
}
else
sql_field->unireg_check= Field::NONE;
}
else if (sql_field->unireg_check != Field::NONE)
(*timestamps_with_niladic)++;
(*timestamps)++;
/* 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;
if (sql_field->flags & NO_DEFAULT_VALUE_FLAG)
sql_field->pack_flag|= FIELDFLAG_NO_DEFAULT;
DBUG_RETURN(0);
}
/*
Preparation for table creation
SYNOPSIS
mysql_prepare_table()
thd Thread object
create_info Create information (like MAX_ROWS)
fields List of fields to create
keys List of keys to create
DESCRIPTION
Prepares the table and key structures for table creation.
NOTES
sets create_info->varchar if the table has a varchar
RETURN VALUES
0 ok
-1 error
*/
static int mysql_prepare_table(THD *thd, HA_CREATE_INFO *create_info,
List<create_field> *fields,
List<Key> *keys, bool tmp_table,
uint *db_options,
handler *file, KEY **key_info_buffer,
uint *key_count, int select_field_count)
{
const char *key_name;
create_field *sql_field,*dup_field;
uint field,null_fields,blob_columns,max_key_length;
ulong record_offset= 0;
KEY *key_info;
KEY_PART_INFO *key_part_info;
int timestamps= 0, timestamps_with_niladic= 0;
int field_no,dup_no;
int select_field_pos,auto_increment=0;
List_iterator<create_field> it(*fields),it2(*fields);
uint total_uneven_bit_length= 0;
DBUG_ENTER("mysql_prepare_table");
select_field_pos= fields->elements - select_field_count;
null_fields=blob_columns=0;
create_info->varchar= 0;
max_key_length= file->max_key_length();
for (field_no=0; (sql_field=it++) ; field_no++)
{
CHARSET_INFO *save_cs;
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;
save_cs= 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, save_cs->csname, sizeof(tmp)-4),
STRING_WITH_LEN("_bin"));
my_error(ER_UNKNOWN_COLLATION, MYF(0), tmp);
DBUG_RETURN(-1);
}
if (sql_field->sql_type == FIELD_TYPE_SET ||
sql_field->sql_type == FIELD_TYPE_ENUM)
{
uint32 dummy;
CHARSET_INFO *cs= sql_field->charset;
TYPELIB *interval= sql_field->interval;
/*
Create typelib from interval_list, and if necessary
convert strings from client character set to the
column character set.
*/
if (!interval)
{
/*
Create the typelib in prepared statement memory if we're
executing one.
*/
MEM_ROOT *stmt_root= thd->stmt_arena->mem_root;
interval= sql_field->interval= typelib(stmt_root,
sql_field->interval_list);
List_iterator<String> it(sql_field->interval_list);
String conv, *tmp;
for (uint i= 0; (tmp= it++); i++)
{
uint lengthsp;
if (String::needs_conversion(tmp->length(), tmp->charset(),
cs, &dummy))
{
uint cnv_errs;
conv.copy(tmp->ptr(), tmp->length(), tmp->charset(), cs, &cnv_errs);
interval->type_names[i]= strmake_root(stmt_root, conv.ptr(),
conv.length());
interval->type_lengths[i]= conv.length();
}
// Strip trailing spaces.
lengthsp= cs->cset->lengthsp(cs, interval->type_names[i],
interval->type_lengths[i]);
interval->type_lengths[i]= lengthsp;
((uchar *)interval->type_names[i])[lengthsp]= '\0';
}
sql_field->interval_list.empty(); // Don't need interval_list anymore
}
/*
Convert the default value from client character
set into the column character set if necessary.
*/
if (sql_field->def && cs != sql_field->def->collation.collation)
{
Query_arena backup_arena;
bool need_to_change_arena= !thd->stmt_arena->is_conventional();
if (need_to_change_arena)
{
/* Asser that we don't do that at every PS execute */
DBUG_ASSERT(thd->stmt_arena->is_first_stmt_execute() ||
thd->stmt_arena->is_first_sp_execute());
thd->set_n_backup_active_arena(thd->stmt_arena, &backup_arena);
}
sql_field->def= sql_field->def->safe_charset_converter(cs);
if (need_to_change_arena)
thd->restore_active_arena(thd->stmt_arena, &backup_arena);
if (! sql_field->def)
{
/* Could not convert */
my_error(ER_INVALID_DEFAULT, MYF(0), sql_field->field_name);
DBUG_RETURN(-1);
}
}
if (sql_field->sql_type == FIELD_TYPE_SET)
{
uint32 field_length;
if (sql_field->def)
{
char *not_used;
uint not_used2;
bool not_found= 0;
String str, *def= sql_field->def->val_str(&str);
def->length(cs->cset->lengthsp(cs, def->ptr(), def->length()));
(void) find_set(interval, def->ptr(), def->length(),
cs, &not_used, &not_used2, &not_found);
if (not_found)
{
my_error(ER_INVALID_DEFAULT, MYF(0), sql_field->field_name);
DBUG_RETURN(-1);
}
}
calculate_interval_lengths(cs, interval, &dummy, &field_length);
sql_field->length= field_length + (interval->count - 1);
}
else /* FIELD_TYPE_ENUM */
{
uint32 field_length;
if (sql_field->def)
{
String str, *def= sql_field->def->val_str(&str);
def->length(cs->cset->lengthsp(cs, def->ptr(), def->length()));
if (!find_type2(interval, def->ptr(), def->length(), cs))
{
my_error(ER_INVALID_DEFAULT, MYF(0), sql_field->field_name);
DBUG_RETURN(-1);
}
}
calculate_interval_lengths(cs, interval, &field_length, &dummy);
sql_field->length= field_length;
}
set_if_smaller(sql_field->length, MAX_FIELD_WIDTH-1);
}
if (sql_field->sql_type == FIELD_TYPE_BIT)
{
sql_field->pack_flag= FIELDFLAG_NUMBER;
if (file->table_flags() & HA_CAN_BIT_FIELD)
total_uneven_bit_length+= sql_field->length & 7;
else
sql_field->pack_flag|= FIELDFLAG_TREAT_BIT_AS_CHAR;
}
sql_field->create_length_to_internal_length();
if (prepare_blob_field(thd, sql_field))
DBUG_RETURN(-1);
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->def= dup_field->def;
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->chars_length;
sql_field->pack_length= dup_field->pack_length;
sql_field->key_length= dup_field->key_length;
sql_field->create_length_to_internal_length();
sql_field->decimals= dup_field->decimals;
sql_field->unireg_check= dup_field->unireg_check;
/*
We're making one field from two, the result field will have
dup_field->flags as flags. If we've incremented null_fields
because of sql_field->flags, decrement it back.
*/
if (!(sql_field->flags & NOT_NULL_FLAG))
null_fields--;
sql_field->flags= dup_field->flags;
it2.remove(); // Remove first (create) definition
select_field_pos--;
break;
}
}
}
/* Don't pack rows in old tables if the user has requested this */
if ((sql_field->flags & BLOB_FLAG) ||
sql_field->sql_type == MYSQL_TYPE_VARCHAR &&
create_info->row_type != ROW_TYPE_FIXED)
(*db_options)|= HA_OPTION_PACK_RECORD;
it2.rewind();
}
/* record_offset will be increased with 'length-of-null-bits' later */
record_offset= 0;
null_fields+= total_uneven_bit_length;
it.rewind();
while ((sql_field=it++))
{
DBUG_ASSERT(sql_field->charset != 0);
if (prepare_create_field(sql_field, &blob_columns,
&timestamps, &timestamps_with_niladic,
file->table_flags()))
DBUG_RETURN(-1);
if (sql_field->sql_type == MYSQL_TYPE_VARCHAR)
create_info->varchar= 1;
sql_field->offset= record_offset;
if (MTYP_TYPENR(sql_field->unireg_check) == Field::NEXT_NUMBER)
auto_increment++;
record_offset+= sql_field->pack_length;
}
if (timestamps_with_niladic > 1)
{
my_message(ER_TOO_MUCH_AUTO_TIMESTAMP_COLS,
ER(ER_TOO_MUCH_AUTO_TIMESTAMP_COLS), MYF(0));
DBUG_RETURN(-1);
}
if (auto_increment > 1)
{
my_message(ER_WRONG_AUTO_KEY, ER(ER_WRONG_AUTO_KEY), MYF(0));
DBUG_RETURN(-1);
}
if (auto_increment &&
(file->table_flags() & HA_NO_AUTO_INCREMENT))
{
my_message(ER_TABLE_CANT_HANDLE_AUTO_INCREMENT,
ER(ER_TABLE_CANT_HANDLE_AUTO_INCREMENT), MYF(0));
DBUG_RETURN(-1);
}
if (blob_columns && (file->table_flags() & HA_NO_BLOBS))
{
my_message(ER_TABLE_CANT_HANDLE_BLOB, ER(ER_TABLE_CANT_HANDLE_BLOB),
MYF(0));
DBUG_RETURN(-1);
}
/* Create keys */
List_iterator<Key> key_iterator(*keys), key_iterator2(*keys);
uint key_parts=0, fk_key_count=0;
bool primary_key=0,unique_key=0;
Key *key, *key2;
uint tmp, key_number;
/* special marker for keys to be ignored */
static char ignore_key[1];
/* Calculate number of key segements */
*key_count= 0;
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=file->max_key_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_iterator2.rewind ();
if (key->type != Key::FOREIGN_KEY)
{
while ((key2 = key_iterator2++) != key)
{
/*
foreign_key_prefix(key, key2) returns 0 if key or key2, or both, is
'generated', and a generated key is a prefix of the other key.
Then we do not need the generated shorter key.
*/
if ((key2->type != Key::FOREIGN_KEY &&
key2->name != ignore_key &&
!foreign_key_prefix(key, key2)))
{
/* TODO: issue warning message */
/* mark that the generated key should be ignored */
if (!key2->generated ||
(key->generated && key->columns.elements <
key2->columns.elements))
key->name= ignore_key;
else
{
key2->name= ignore_key;
key_parts-= key2->columns.elements;
(*key_count)--;
}
break;
}
}
}
if (key->name != ignore_key)
key_parts+=key->columns.elements;
else
(*key_count)--;
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=file->max_keys();
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;
if (key->name == ignore_key)
{
/* ignore redundant keys */
do
key=key_iterator++;
while (key && key->name == ignore_key);
if (!key)
break;
}
switch(key->type){
case Key::MULTIPLE:
key_info->flags= 0;
break;
case Key::FULLTEXT:
key_info->flags= HA_FULLTEXT;
if ((key_info->parser_name= key->parser_name))
key_info->flags|= HA_USES_PARSER;
break;
case Key::SPATIAL:
#ifdef HAVE_SPATIAL
key_info->flags= HA_SPATIAL;
break;
#else
my_error(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;
break;
}
if (key->generated)
key_info->flags|= HA_GENERATED_KEY;
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_message(ER_TABLE_CANT_HANDLE_FT, ER(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_error(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_error(ER_WRONG_ARGUMENTS, MYF(0), "RTREE INDEX");
DBUG_RETURN(-1);
}
/* TODO: To be deleted */
my_error(ER_NOT_SUPPORTED_YET, MYF(0), "RTREE INDEX");
DBUG_RETURN(-1);
#else
my_error(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), cols2(key->columns);
CHARSET_INFO *ft_key_charset=0; // for FULLTEXT
for (uint column_nr=0 ; (column=cols++) ; column_nr++)
{
uint length;
key_part_spec *dup_column;
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_error(ER_KEY_COLUMN_DOES_NOT_EXITS, MYF(0), column->field_name);
DBUG_RETURN(-1);
}
while ((dup_column= cols2++) != column)
{
if (!my_strcasecmp(system_charset_info,
column->field_name, dup_column->field_name))
{
my_printf_error(ER_DUP_FIELDNAME,
ER(ER_DUP_FIELDNAME),MYF(0),
column->field_name);
DBUG_RETURN(-1);
}
}
cols2.rewind();
if (key->type == Key::FULLTEXT)
{
if ((sql_field->sql_type != MYSQL_TYPE_STRING &&
sql_field->sql_type != MYSQL_TYPE_VARCHAR &&
!f_is_blob(sql_field->pack_flag)) ||
sql_field->charset == &my_charset_bin ||
sql_field->charset->mbminlen > 1 || // ucs2 doesn't work yet
(ft_key_charset && sql_field->charset != ft_key_charset))
{
my_error(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) ||
(f_is_geom(sql_field->pack_flag) && key->type != Key::SPATIAL))
{
if (!(file->table_flags() & HA_CAN_INDEX_BLOBS))
{
my_error(ER_BLOB_USED_AS_KEY, MYF(0), column->field_name);
DBUG_RETURN(-1);
}
if (f_is_geom(sql_field->pack_flag) && sql_field->geom_type ==
Field::GEOM_POINT)
column->length= 21;
if (!column->length)
{
my_error(ER_BLOB_KEY_WITHOUT_LENGTH, MYF(0), column->field_name);
DBUG_RETURN(-1);
}
}
#ifdef HAVE_SPATIAL
if (key->type == Key::SPATIAL)
{
if (!column->length)
{
/*
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;
null_fields--;
}
else
key_info->flags|= HA_NULL_PART_KEY;
if (!(file->table_flags() & HA_NULL_IN_KEY))
{
my_error(ER_NULL_COLUMN_IN_INDEX, MYF(0), column->field_name);
DBUG_RETURN(-1);
}
if (key->type == Key::SPATIAL)
{
my_message(ER_SPATIAL_CANT_HAVE_NULL,
ER(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;
length= sql_field->key_length;
if (column->length)
{
if (f_is_blob(sql_field->pack_flag))
{
if ((length=column->length) > max_key_length ||
length > file->max_key_part_length())
{
length=min(max_key_length, file->max_key_part_length());
if (key->type == Key::MULTIPLE)
{
/* not a critical problem */
char warn_buff[MYSQL_ERRMSG_SIZE];
my_snprintf(warn_buff, sizeof(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_message(ER_WRONG_SUB_KEY, ER(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_error(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];
my_snprintf(warn_buff, sizeof(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 == MYSQL_TYPE_STRING ||
sql_field->sql_type == MYSQL_TYPE_VARCHAR ||
sql_field->pack_flag & FIELDFLAG_BLOB)))
{
if (column_nr == 0 && (sql_field->pack_flag & FIELDFLAG_BLOB) ||
sql_field->sql_type == MYSQL_TYPE_VARCHAR)
key_info->flags|= HA_BINARY_PACK_KEY | HA_VAR_LENGTH_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_message(ER_MULTIPLE_PRI_KEY, ER(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;
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_message(ER_REQUIRES_PRIMARY_KEY, ER(ER_REQUIRES_PRIMARY_KEY), MYF(0));
DBUG_RETURN(-1);
}
if (auto_increment > 0)
{
my_message(ER_WRONG_AUTO_KEY, ER(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);
create_info->null_bits= null_fields;
DBUG_RETURN(0);
}
/*
Set table default charset, if not set
SYNOPSIS
set_table_default_charset()
create_info Table create information
DESCRIPTION
If the table character set was not given explicitely,
let's fetch the database default character set and
apply it to the table.
*/
static void set_table_default_charset(THD *thd,
HA_CREATE_INFO *create_info, char *db)
{
if (!create_info->default_table_charset)
{
HA_CREATE_INFO db_info;
char path[FN_REFLEN];
/* Abuse build_table_filename() to build the path to the db.opt file */
build_table_filename(path, sizeof(path), db, "", MY_DB_OPT_FILE);
load_db_opt(thd, path, &db_info);
create_info->default_table_charset= db_info.default_table_charset;
}
}
/*
Extend long VARCHAR fields to blob & prepare field if it's a blob
SYNOPSIS
prepare_blob_field()
sql_field Field to check
RETURN
0 ok
1 Error (sql_field can't be converted to blob)
In this case the error is given
*/
static bool prepare_blob_field(THD *thd, create_field *sql_field)
{
DBUG_ENTER("prepare_blob_field");
if (sql_field->length > MAX_FIELD_VARCHARLENGTH &&
!(sql_field->flags & BLOB_FLAG))
{
/* Convert long VARCHAR columns to TEXT or BLOB */
char warn_buff[MYSQL_ERRMSG_SIZE];
if (sql_field->def || (thd->variables.sql_mode & (MODE_STRICT_TRANS_TABLES |
MODE_STRICT_ALL_TABLES)))
{
my_error(ER_TOO_BIG_FIELDLENGTH, MYF(0), sql_field->field_name,
MAX_FIELD_VARCHARLENGTH / sql_field->charset->mbmaxlen);
DBUG_RETURN(1);
}
sql_field->sql_type= FIELD_TYPE_BLOB;
sql_field->flags|= BLOB_FLAG;
sprintf(warn_buff, ER(ER_AUTO_CONVERT), sql_field->field_name,
(sql_field->charset == &my_charset_bin) ? "VARBINARY" : "VARCHAR",
(sql_field->charset == &my_charset_bin) ? "BLOB" : "TEXT");
push_warning(thd, MYSQL_ERROR::WARN_LEVEL_NOTE, ER_AUTO_CONVERT,
warn_buff);
}
if ((sql_field->flags & BLOB_FLAG) && sql_field->length)
{
if (sql_field->sql_type == FIELD_TYPE_BLOB)
{
/* The user has given a length to the blob column */
sql_field->sql_type= get_blob_type_from_length(sql_field->length);
sql_field->pack_length= calc_pack_length(sql_field->sql_type, 0);
}
sql_field->length= 0;
}
DBUG_RETURN(0);
}
/*
Preparation of create_field for SP function return values.
Based on code used in the inner loop of mysql_prepare_table() above
SYNOPSIS
sp_prepare_create_field()
thd Thread object
sql_field Field to prepare
DESCRIPTION
Prepares the field structures for field creation.
*/
void sp_prepare_create_field(THD *thd, create_field *sql_field)
{
if (sql_field->sql_type == FIELD_TYPE_SET ||
sql_field->sql_type == FIELD_TYPE_ENUM)
{
uint32 field_length, dummy;
if (sql_field->sql_type == FIELD_TYPE_SET)
{
calculate_interval_lengths(sql_field->charset,
sql_field->interval, &dummy,
&field_length);
sql_field->length= field_length +
(sql_field->interval->count - 1);
}
else /* FIELD_TYPE_ENUM */
{
calculate_interval_lengths(sql_field->charset,
sql_field->interval,
&field_length, &dummy);
sql_field->length= field_length;
}
set_if_smaller(sql_field->length, MAX_FIELD_WIDTH-1);
}
if (sql_field->sql_type == FIELD_TYPE_BIT)
{
sql_field->pack_flag= FIELDFLAG_NUMBER |
FIELDFLAG_TREAT_BIT_AS_CHAR;
}
sql_field->create_length_to_internal_length();
DBUG_ASSERT(sql_field->def == 0);
/* Can't go wrong as sql_field->def is not defined */
(void) prepare_blob_field(thd, sql_field);
}
/*
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
internal_tmp_table Set to 1 if this is an internal temporary table
(From ALTER TABLE)
DESCRIPTION
If one creates a temporary table, this is automatically 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
FALSE OK
TRUE error
*/
bool 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 internal_tmp_table,
uint select_field_count)
{
char path[FN_REFLEN];
uint path_length;
const char *alias;
uint db_options, key_count;
KEY *key_info_buffer;
handler *file;
bool error= TRUE;
DBUG_ENTER("mysql_create_table");
/* Check for duplicate fields and check type of table to create */
if (!fields.elements)
{
my_message(ER_TABLE_MUST_HAVE_COLUMNS, ER(ER_TABLE_MUST_HAVE_COLUMNS),
MYF(0));
DBUG_RETURN(TRUE);
}
if (check_engine(thd, table_name, &create_info->db_type))
DBUG_RETURN(TRUE);
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);
if (!(file=get_new_handler((TABLE_SHARE*) 0, thd->mem_root,
create_info->db_type)))
{
my_error(ER_OUTOFMEMORY, MYF(0), 128);//128 bytes invented
DBUG_RETURN(TRUE);
}
#ifdef WITH_PARTITION_STORAGE_ENGINE
partition_info *part_info= thd->lex->part_info;
if (part_info)
{
/*
The table has been specified as a partitioned table.
If this is part of an ALTER TABLE the handler will be the partition
handler but we need to specify the default handler to use for
partitions also in the call to check_partition_info. We transport
this information in the default_db_type variable, it is either
DB_TYPE_DEFAULT or the engine set in the ALTER TABLE command.
*/
handlerton *part_engine_type= create_info->db_type;
char *part_syntax_buf;
uint syntax_len;
if (part_engine_type == &partition_hton)
{
/*
This only happens at ALTER TABLE.
default_engine_type was assigned from the engine set in the ALTER
TABLE command.
*/
part_engine_type= ha_checktype(thd,
ha_legacy_type(part_info->default_engine_type), 0, 0);
}
else
{
part_info->default_engine_type= create_info->db_type;
}
if (check_partition_info(part_info, part_engine_type,
file, create_info->max_rows))
goto err;
/*
We reverse the partitioning parser and generate a standard format
for syntax stored in frm file.
*/
if (!(part_syntax_buf= generate_partition_syntax(part_info,
&syntax_len,
TRUE,TRUE)))
goto err;
part_info->part_info_string= part_syntax_buf;
part_info->part_info_len= syntax_len;
if ((!(file->partition_flags() & HA_CAN_PARTITION)) ||
create_info->db_type == &partition_hton)
{
/*
The handler assigned to the table cannot handle partitioning.
Assign the partition handler as the handler of the table.
*/
DBUG_PRINT("info", ("db_type: %d part_flag: %d",
create_info->db_type,file->partition_flags()));
delete file;
create_info->db_type= &partition_hton;
if (!(file= get_ha_partition(part_info)))
{
DBUG_RETURN(TRUE);
}
}
}
#endif
#ifdef NOT_USED
/*
if there is a technical reason for a handler not to have support
for temp. tables this code can be re-enabled.
Otherwise, if a handler author has a wish to prohibit usage of
temporary tables for his handler he should implement a check in
::create() method
*/
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);
goto err;
}
#endif
set_table_default_charset(thd, create_info, (char*) db);
if (mysql_prepare_table(thd, create_info, &fields,
&keys, internal_tmp_table, &db_options, file,
&key_info_buffer, &key_count,
select_field_count))
goto err;
/* Check if table exists */
if (create_info->options & HA_LEX_CREATE_TMP_TABLE)
{
char tmp_table_name[tmp_file_prefix_length+22+22+22+3];
my_snprintf(tmp_table_name, sizeof(tmp_table_name), "%s%lx_%lx_%x",
tmp_file_prefix, current_pid, thd->thread_id,
thd->tmp_table++);
path_length= build_tmptable_filename(path, sizeof(path), mysql_tmpdir,
tmp_table_name, reg_ext);
if (lower_case_table_names)
my_casedn_str(files_charset_info, path);
create_info->table_options|=HA_CREATE_DELAY_KEY_WRITE;
}
else
path_length= build_table_filename(path, sizeof(path), db, alias, reg_ext);
/* 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
push_warning_printf(thd, MYSQL_ERROR::WARN_LEVEL_NOTE,
ER_TABLE_EXISTS_ERROR, ER(ER_TABLE_EXISTS_ERROR),
alias);
error= 0;
goto err;
}
my_error(ER_TABLE_EXISTS_ERROR, MYF(0), alias);
goto err;
}
if (wait_if_global_read_lock(thd, 0, 1))
goto err;
VOID(pthread_mutex_lock(&LOCK_open));
if (!internal_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)
goto warn;
my_error(ER_TABLE_EXISTS_ERROR,MYF(0),table_name);
goto unlock_and_end;
}
DBUG_ASSERT(get_cached_table_share(db, alias) == 0);
}
/*
Check that table with given name does not already
exist in any storage engine. In such a case it should
be discovered and the error ER_TABLE_EXISTS_ERROR be returned
unless user specified CREATE TABLE IF EXISTS
The LOCK_open mutex has been locked to make sure no
one else is attempting to discover the table. Since
it's not on disk as a frm file, no one could be using it!
*/
if (!(create_info->options & HA_LEX_CREATE_TMP_TABLE))
{
bool create_if_not_exists =
create_info->options & HA_LEX_CREATE_IF_NOT_EXISTS;
if (ha_table_exists_in_engine(thd, db, table_name))
{
DBUG_PRINT("info", ("Table with same name already existed in handler"));
if (create_if_not_exists)
goto warn;
my_error(ER_TABLE_EXISTS_ERROR,MYF(0),table_name);
goto unlock_and_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;
path[path_length - reg_ext_length]= '\0'; // Remove .frm extension
if (rea_create_table(thd, path, db, table_name, create_info, fields,
key_count, key_info_buffer, file))
goto unlock_and_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 unlock_and_end;
}
thd->tmp_table_used= 1;
}
/*
Don't write statement if:
- It is an internal temporary table,
- Row-based logging is used and it we are creating a temporary table, or
- The binary log is not open.
Otherwise, the statement shall be binlogged.
*/
if (!internal_tmp_table &&
(!binlog_row_based ||
(binlog_row_based &&
!(create_info->options & HA_LEX_CREATE_TMP_TABLE))))
write_bin_log(thd, TRUE, thd->query, thd->query_length);
error= FALSE;
unlock_and_end:
VOID(pthread_mutex_unlock(&LOCK_open));
start_waiting_global_read_lock(thd);
err:
thd->proc_info="After create";
delete file;
DBUG_RETURN(error);
warn:
error= FALSE;
push_warning_printf(thd, MYSQL_ERROR::WARN_LEVEL_NOTE,
ER_TABLE_EXISTS_ERROR, ER(ER_TABLE_EXISTS_ERROR),
alias);
create_info->table_existed= 1; // Mark that table existed
goto unlock_and_end;
}
/*
** 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, sizeof(buff)-4);
/*
Only 3 chars + '\0' left, so need to limit to 2 digit
This is ok as we can't have more than 100 keys anyway
*/
for (uint i=2 ; i< 100; i++)
{
*buff_end= '_';
int10_to_str(i, buff_end+1, 10);
if (!check_if_keyname_exists(buff,start,end))
return sql_strdup(buff);
}
return (char*) "not_specified"; // Should never happen
}
/****************************************************************************
** Create table from a list of fields and items
****************************************************************************/
TABLE *create_table_from_items(THD *thd, HA_CREATE_INFO *create_info,
TABLE_LIST *create_table,
List<create_field> *extra_fields,
List<Key> *keys,
List<Item> *items,
MYSQL_LOCK **lock)
{
TABLE tmp_table; // Used during 'create_field()'
TABLE_SHARE share;
TABLE *table= 0;
uint select_field_count= items->elements;
/* Add selected items to field list */
List_iterator_fast<Item> it(*items);
Item *item;
Field *tmp_field;
bool not_used;
DBUG_ENTER("create_table_from_items");
tmp_table.alias= 0;
tmp_table.timestamp_field= 0;
tmp_table.s= &share;
init_tmp_table_share(&share, "", 0, "", "");
tmp_table.s->db_create_options=0;
tmp_table.s->blob_ptr_size= portable_sizeof_char_ptr;
tmp_table.s->db_low_byte_first=
test(create_info->db_type == &myisam_hton ||
create_info->db_type == &heap_hton);
tmp_table.null_row=tmp_table.maybe_null=0;
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, 0, 0);
if (!field ||
!(cr_field=new create_field(field,(item->type() == Item::FIELD_ITEM ?
((Item_field *)item)->field :
(Field*) 0))))
DBUG_RETURN(0);
if (item->maybe_null)
cr_field->flags &= ~NOT_NULL_FLAG;
extra_fields->push_back(cr_field);
}
/*
create and lock table
We don't log the statement, it will be logged later.
If this is a HEAP table, the automatic DELETE FROM which is written to the
binlog when a HEAP table is opened for the first time since startup, must
not be written: 1) it would be wrong (imagine we're in CREATE SELECT: we
don't want to delete from it) 2) it would be written before the CREATE
TABLE, which is a wrong order. So we keep binary logging disabled when we
open_table().
TODO: create and open should be done atomic !
*/
{
tmp_disable_binlog(thd);
if (!mysql_create_table(thd, create_table->db, create_table->table_name,
create_info, *extra_fields, *keys, 0,
select_field_count))
{
if (! (table= open_table(thd, create_table, thd->mem_root, (bool*) 0,
MYSQL_LOCK_IGNORE_FLUSH)))
quick_rm_table(create_info->db_type, create_table->db,
table_case_name(create_info, create_table->table_name));
}
reenable_binlog(thd);
if (!table) // open failed
DBUG_RETURN(0);
}
/*
FIXME: What happens if trigger manages to be created while we are
obtaining this lock ? May be it is sensible just to disable
trigger execution in this case ? Or will MYSQL_LOCK_IGNORE_FLUSH
save us from that ?
*/
table->reginfo.lock_type=TL_WRITE;
if (! ((*lock)= mysql_lock_tables(thd, &table, 1,
MYSQL_LOCK_IGNORE_FLUSH, &not_used)))
{
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, create_table->db,
table_case_name(create_info, create_table->table_name));
DBUG_RETURN(0);
}
table->file->extra(HA_EXTRA_WRITE_CACHE);
DBUG_RETURN(table);
}
/****************************************************************************
** Alter a table definition
****************************************************************************/
bool
mysql_rename_table(handlerton *base,
const char *old_db,
const char *old_name,
const char *new_db,
const char *new_name)
{
THD *thd= current_thd;
char from[FN_REFLEN], to[FN_REFLEN], lc_from[FN_REFLEN], lc_to[FN_REFLEN];
char *from_base= from, *to_base= to;
char tmp_name[NAME_LEN+1];
handler *file;
int error=0;
DBUG_ENTER("mysql_rename_table");
file= (base == NULL ? 0 :
get_new_handler((TABLE_SHARE*) 0, thd->mem_root, base));
build_table_filename(from, sizeof(from), old_db, old_name, "");
build_table_filename(to, sizeof(to), new_db, new_name, "");
/*
If lower_case_table_names == 2 (case-preserving but case-insensitive
file system) and the storage is not HA_FILE_BASED, we need to provide
a lowercase file name, but we leave the .frm in mixed case.
*/
if (lower_case_table_names == 2 && file &&
!(file->table_flags() & HA_FILE_BASED))
{
strmov(tmp_name, old_name);
my_casedn_str(files_charset_info, tmp_name);
build_table_filename(lc_from, sizeof(lc_from), old_db, tmp_name, "");
from_base= lc_from;
strmov(tmp_name, new_name);
my_casedn_str(files_charset_info, tmp_name);
build_table_filename(lc_to, sizeof(lc_to), new_db, tmp_name, "");
to_base= lc_to;
}
if (!file || !(error=file->rename_table(from_base, to_base)))
{
if (rename_file_ext(from,to,reg_ext))
{
error=my_errno;
/* Restore old file name */
if (file)
file->rename_table(to_base, from_base);
}
}
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_ENTER("wait_while_table_is_used");
DBUG_PRINT("enter", ("table: '%s' share: 0x%lx db_stat: %u version: %u",
table->s->table_name.str, (ulong) table->s,
table->db_stat, table->s->version));
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 */
remove_table_from_cache(thd, table->s->db.str,
table->s->table_name.str,
RTFC_WAIT_OTHER_THREAD_FLAG);
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 !
*/
void 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_VOID_RETURN;
}
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(STRING_WITH_LEN("error"), system_charset_info);
protocol->store(errmsg, system_charset_info);
thd->clear_error();
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], uname[FN_REFLEN];
char* table_name= table->table_name;
char* db= table->db;
VOID(tablename_to_filename(table->table_name, uname, sizeof(uname)));
if (fn_format_relative_to_data_home(src_path, uname, backup_dir, reg_ext))
DBUG_RETURN(-1); // protect buffer overflow
build_table_filename(dst_path, sizeof(dst_path), db, table_name, reg_ext);
if (lock_and_wait_for_table_name(thd,table))
DBUG_RETURN(-1);
if (my_copy(src_path, dst_path, 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
*/
pthread_mutex_lock(&LOCK_open);
if (reopen_name_locked_table(thd, table))
{
unlock_table_name(thd, table);
pthread_mutex_unlock(&LOCK_open);
DBUG_RETURN(send_check_errmsg(thd, table, "restore",
"Failed to open partially restored 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;
TABLE_SHARE *share;
char from[FN_REFLEN],tmp[FN_REFLEN+32];
const char **ext;
MY_STAT stat_info;
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 key[MAX_DBKEY_LENGTH];
uint key_length;
key_length= create_table_def_key(thd, key, table_list, 0);
pthread_mutex_lock(&LOCK_open);
if (!(share= (get_table_share(thd, table_list, key, key_length, 0,
&error))))
{
pthread_mutex_unlock(&LOCK_open);
DBUG_RETURN(0); // Can't open frm file
}
if (open_table_from_share(thd, share, "", 0, 0, 0, &tmp_table))
{
release_table_share(share, RELEASE_NORMAL);
pthread_mutex_unlock(&LOCK_open);
DBUG_RETURN(0); // Out of memory
}
table= &tmp_table;
pthread_mutex_unlock(&LOCK_open);
}
/*
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
*/
/*
Check if this is a table type that stores index and data separately,
like ISAM or MyISAM
*/
ext= table->file->bas_ext();
if (!ext[0] || !ext[1])
goto end; // No data file
// Name of data file
strxmov(from, table->s->normalized_path.str, ext[1], NullS);
if (!my_stat(from, &stat_info, MYF(0)))
goto end; // Can't use USE_FRM flag
my_snprintf(tmp, sizeof(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.
*/
pthread_mutex_lock(&LOCK_open);
if (reopen_name_locked_table(thd, table_list))
{
unlock_table_name(thd, table_list);
pthread_mutex_unlock(&LOCK_open);
error= send_check_errmsg(thd, table_list, "repair",
"Failed to open partially repaired table");
goto end;
}
pthread_mutex_unlock(&LOCK_open);
end:
if (table == &tmp_table)
{
pthread_mutex_lock(&LOCK_open);
closefrm(table, 1); // Free allocated memory
pthread_mutex_unlock(&LOCK_open);
}
DBUG_RETURN(error);
}
/*
RETURN VALUES
FALSE Message sent to net (admin operation went ok)
TRUE Message should be sent by caller
(admin operation or network communication failed)
*/
static bool 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,
bool no_warnings_for_error,
uint extra_open_options,
int (*prepare_func)(THD *, TABLE_LIST *,
HA_CHECK_OPT *),
int (handler::*operator_func)(THD *,
HA_CHECK_OPT *),
int (view_operator_func)(THD *, TABLE_LIST*))
{
TABLE_LIST *table, *save_next_global, *save_next_local;
SELECT_LEX *select= &thd->lex->select_lex;
List<Item> field_list;
Item *item;
Protocol *protocol= thd->protocol;
LEX *lex= thd->lex;
int result_code;
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,
Protocol::SEND_NUM_ROWS | Protocol::SEND_EOF))
DBUG_RETURN(TRUE);
mysql_ha_flush(thd, tables, MYSQL_HA_CLOSE_FINAL, FALSE);
for (table= tables; table; table= table->next_local)
{
char table_name[NAME_LEN*2+2];
char* db = table->db;
bool fatal_error=0;
strxmov(table_name, db, ".", table->table_name, NullS);
thd->open_options|= extra_open_options;
table->lock_type= lock_type;
/* open only one table from local list of command */
save_next_global= table->next_global;
table->next_global= 0;
save_next_local= table->next_local;
table->next_local= 0;
select->table_list.first= (byte*)table;
/*
Time zone tables and SP tables can be add to lex->query_tables list,
so it have to be prepared.
TODO: Investigate if we can put extra tables into argument instead of
using lex->query_tables
*/
lex->query_tables= table;
lex->query_tables_last= &table->next_global;
lex->query_tables_own_last= 0;
thd->no_warnings_for_error= no_warnings_for_error;
if (view_operator_func == NULL)
table->required_type=FRMTYPE_TABLE;
open_and_lock_tables(thd, table);
thd->no_warnings_for_error= 0;
table->next_global= save_next_global;
table->next_local= save_next_local;
thd->open_options&= ~extra_open_options;
if (prepare_func)
{
switch ((*prepare_func)(thd, table, check_opt)) {
case 1: // error, message written to net
close_thread_tables(thd);
continue;
case -1: // error, message could be written to net
goto err;
default: // should be 0 otherwise
;
}
}
/*
CHECK TABLE command is only command where VIEW allowed here and this
command use only temporary teble method for VIEWs resolving => there
can't be VIEW tree substitition of join view => if opening table
succeed then table->table will have real TABLE pointer as value (in
case of join view substitution table->table can be 0, but here it is
impossible)
*/
if (!table->table)
{
char buf[ERRMSGSIZE+ERRMSGSIZE+2];
const char *err_msg;
protocol->prepare_for_resend();
protocol->store(table_name, system_charset_info);
protocol->store(operator_name, system_charset_info);
protocol->store(STRING_WITH_LEN("error"), system_charset_info);
if (!(err_msg=thd->net.last_error))
err_msg=ER(ER_CHECK_NO_SUCH_TABLE);
/* if it was a view will check md5 sum */
if (table->view &&
view_checksum(thd, table) == HA_ADMIN_WRONG_CHECKSUM)
{
strxmov(buf, err_msg, "; ", ER(ER_VIEW_CHECKSUM), NullS);
err_msg= (const char *)buf;
}
protocol->store(err_msg, system_charset_info);
lex->cleanup_after_one_table_open();
thd->clear_error();
/*
View opening can be interrupted in the middle of process so some
tables can be left opening
*/
close_thread_tables(thd);
if (protocol->write())
goto err;
continue;
}
if (table->view)
{
result_code= (*view_operator_func)(thd, table);
goto send_result;
}
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];
uint length;
protocol->prepare_for_resend();
protocol->store(table_name, system_charset_info);
protocol->store(operator_name, system_charset_info);
protocol->store(STRING_WITH_LEN("error"), system_charset_info);
length= my_snprintf(buff, sizeof(buff), ER(ER_OPEN_AS_READONLY),
table_name);
protocol->store(buff, length, 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->s->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);
remove_table_from_cache(thd, table->table->s->db.str,
table->table->s->table_name.str,
RTFC_WAIT_OTHER_THREAD_FLAG |
RTFC_CHECK_KILLED_FLAG);
thd->exit_cond(old_message);
if (thd->killed)
goto err;
/* Flush entries in the query cache involving this table. */
query_cache_invalidate3(thd, table->table, 0);
open_for_modify= 0;
}
if (table->table->s->crashed && operator_func == &handler::check)
{
protocol->prepare_for_resend();
protocol->store(table_name, system_charset_info);
protocol->store(operator_name, system_charset_info);
protocol->store(STRING_WITH_LEN("warning"), system_charset_info);
protocol->store(STRING_WITH_LEN("Table is marked as crashed"),
system_charset_info);
if (protocol->write())
goto err;
}
result_code = (table->table->file->*operator_func)(thd, check_opt);
send_result:
lex->cleanup_after_one_table_open();
thd->clear_error(); // these errors shouldn't get client
protocol->prepare_for_resend();
protocol->store(table_name, system_charset_info);
protocol->store(operator_name, system_charset_info);
send_result_message:
DBUG_PRINT("info", ("result_code: %d", result_code));
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(STRING_WITH_LEN("note"), system_charset_info);
protocol->store(buf, length, system_charset_info);
}
break;
case HA_ADMIN_NOT_BASE_TABLE:
{
char buf[ERRMSGSIZE+20];
uint length= my_snprintf(buf, ERRMSGSIZE,
ER(ER_BAD_TABLE_ERROR), table_name);
protocol->store(STRING_WITH_LEN("note"), system_charset_info);
protocol->store(buf, length, system_charset_info);
}
break;
case HA_ADMIN_OK:
protocol->store(STRING_WITH_LEN("status"), system_charset_info);
protocol->store(STRING_WITH_LEN("OK"), system_charset_info);
break;
case HA_ADMIN_FAILED:
protocol->store(STRING_WITH_LEN("status"), system_charset_info);
protocol->store(STRING_WITH_LEN("Operation failed"),
system_charset_info);
break;
case HA_ADMIN_REJECT:
protocol->store(STRING_WITH_LEN("status"), system_charset_info);
protocol->store(STRING_WITH_LEN("Operation need committed state"),
system_charset_info);
open_for_modify= FALSE;
break;
case HA_ADMIN_ALREADY_DONE:
protocol->store(STRING_WITH_LEN("status"), system_charset_info);
protocol->store(STRING_WITH_LEN("Table is already up to date"),
system_charset_info);
break;
case HA_ADMIN_CORRUPT:
protocol->store(STRING_WITH_LEN("error"), system_charset_info);
protocol->store(STRING_WITH_LEN("Corrupt"), system_charset_info);
fatal_error=1;
break;
case HA_ADMIN_INVALID:
protocol->store(STRING_WITH_LEN("error"), system_charset_info);
protocol->store(STRING_WITH_LEN("Invalid argument"),
system_charset_info);
break;
case HA_ADMIN_TRY_ALTER:
{
/*
This is currently used only by InnoDB. ha_innobase::optimize() answers
"try with alter", so here we close the table, do an ALTER TABLE,
reopen the table and do ha_innobase::analyze() on it.
*/
close_thread_tables(thd);
TABLE_LIST *save_next_local= table->next_local,
*save_next_global= table->next_global;
table->next_local= table->next_global= 0;
tmp_disable_binlog(thd); // binlogging is done by caller if wanted
result_code= mysql_recreate_table(thd, table, 0);
reenable_binlog(thd);
close_thread_tables(thd);
if (!result_code) // recreation went ok
{
if ((table->table= open_ltable(thd, table, lock_type)) &&
((result_code= table->table->file->analyze(thd, check_opt)) > 0))
result_code= 0; // analyze went ok
}
if (result_code) // either mysql_recreate_table or analyze failed
{
const char *err_msg;
if ((err_msg= thd->net.last_error))
{
if (!thd->vio_ok())
{
sql_print_error(err_msg);
}
else
{
/* Hijack the row already in-progress. */
protocol->store(STRING_WITH_LEN("error"), system_charset_info);
protocol->store(err_msg, system_charset_info);
(void)protocol->write();
/* Start off another row for HA_ADMIN_FAILED */
protocol->prepare_for_resend();
protocol->store(table_name, system_charset_info);
protocol->store(operator_name, system_charset_info);
}
}
}
result_code= result_code ? HA_ADMIN_FAILED : HA_ADMIN_OK;
table->next_local= save_next_local;
table->next_global= save_next_global;
goto send_result_message;
}
case HA_ADMIN_WRONG_CHECKSUM:
{
protocol->store(STRING_WITH_LEN("note"), system_charset_info);
protocol->store(ER(ER_VIEW_CHECKSUM), strlen(ER(ER_VIEW_CHECKSUM)),
system_charset_info);
break;
}
default: // Probably HA_ADMIN_INTERNAL_ERROR
{
char buf[ERRMSGSIZE+20];
uint length=my_snprintf(buf, ERRMSGSIZE,
"Unknown - internal error %d during operation",
result_code);
protocol->store(STRING_WITH_LEN("error"), system_charset_info);
protocol->store(buf, length, system_charset_info);
fatal_error=1;
break;
}
}
if (table->table)
{
if (fatal_error)
table->table->s->version=0; // Force close of table
else if (open_for_modify)
{
pthread_mutex_lock(&LOCK_open);
remove_table_from_cache(thd, table->table->s->db.str,
table->table->s->table_name.str, RTFC_NO_FLAG);
pthread_mutex_unlock(&LOCK_open);
/* Something may be modified, that's why 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(FALSE);
err:
close_thread_tables(thd); // Shouldn't be needed
if (table)
table->table=0;
DBUG_RETURN(TRUE);
}
bool 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, 0,
&handler::backup, 0));
}
bool 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, 1, 0,
&prepare_for_restore,
&handler::restore, 0));
}
bool 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,
test(check_opt->sql_flags & TT_USEFRM),
HA_OPEN_FOR_REPAIR,
&prepare_for_repair,
&handler::repair, 0));
}
bool 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, 1,0,0,0,
&handler::optimize, 0));
}
/*
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
FALSE ok
TRUE error
*/
bool 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(TRUE);
}
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, 0, &handler::assign_to_keycache, 0));
}
/*
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
FALSE ok
TRUE error
*/
bool 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, 0,
&handler::preload_keys, 0));
}
/*
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
FALSE OK
TRUE error
*/
bool 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];
uint dst_path_length;
char *db= table->db;
char *table_name= table->table_name;
char *src_db;
char *src_table= table_ident->table.str;
int err;
bool res= TRUE;
enum legacy_db_type not_used;
TABLE_LIST src_tables_list;
DBUG_ENTER("mysql_create_like_table");
src_db= table_ident->db.str ? table_ident->db.str : thd->db;
/*
Validate the source table
*/
if (table_ident->table.length > NAME_LEN ||
(table_ident->table.length &&
check_table_name(src_table,table_ident->table.length)))
{
my_error(ER_WRONG_TABLE_NAME, MYF(0), src_table);
DBUG_RETURN(TRUE);
}
if (!src_db || check_db_name(src_db))
{
my_error(ER_WRONG_DB_NAME, MYF(0), src_db ? src_db : "NULL");
DBUG_RETURN(-1);
}
bzero((gptr)&src_tables_list, sizeof(src_tables_list));
src_tables_list.db= src_db;
src_tables_list.table_name= src_table;
if (lock_and_wait_for_table_name(thd, &src_tables_list))
goto err;
if ((tmp_table= find_temporary_table(thd, src_db, src_table)))
strxmov(src_path, tmp_table->s->path.str, reg_ext, NullS);
else
{
build_table_filename(src_path, sizeof(src_path),
src_db, src_table, reg_ext);
/* Resolve symlinks (for windows) */
unpack_filename(src_path, src_path);
if (lower_case_table_names)
my_casedn_str(files_charset_info, src_path);
if (access(src_path, F_OK))
{
my_error(ER_BAD_TABLE_ERROR, MYF(0), src_table);
goto err;
}
}
/*
create like should be not allowed for Views, Triggers, ...
*/
if (mysql_frm_type(thd, src_path, &not_used) != FRMTYPE_TABLE)
{
my_error(ER_WRONG_OBJECT, MYF(0), src_db, src_table, "BASE TABLE");
goto err;
}
/*
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;
dst_path_length= my_snprintf(dst_path, sizeof(dst_path),
"%s%s%lx_%lx_%x%s",
mysql_tmpdir, tmp_file_prefix, current_pid,
thd->thread_id, thd->tmp_table++, reg_ext);
if (lower_case_table_names)
my_casedn_str(files_charset_info, dst_path);
create_info->table_options|= HA_CREATE_DELAY_KEY_WRITE;
}
else
{
dst_path_length= build_table_filename(dst_path, sizeof(dst_path),
db, table_name, reg_ext);
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_DONT_OVERWRITE_FILE)))
{
if (my_errno == ENOENT)
my_error(ER_BAD_DB_ERROR,MYF(0),db);
else
my_error(ER_CANT_CREATE_FILE,MYF(0),dst_path,my_errno);
goto err;
}
/*
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).
*/
dst_path[dst_path_length - reg_ext_length]= '\0'; // Remove .frm
err= ha_create_table(thd, dst_path, db, table_name, 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 */
goto err; /* purecov: inspected */
}
}
else if (err)
{
(void) quick_rm_table(create_info->db_type, db,
table_name); /* purecov: inspected */
goto err; /* purecov: inspected */
}
/*
We have to write the query before we unlock the tables.
*/
if (binlog_row_based)
{
/*
Since temporary tables are not replicated under row-based
replication, CREATE TABLE ... LIKE ... needs special
treatement. We have four cases to consider, according to the
following decision table:
==== ========= ========= ==============================
Case Target Source Write to binary log
==== ========= ========= ==============================
1 normal normal Original statement
2 normal temporary Generated statement
3 temporary normal Nothing
4 temporary temporary Nothing
==== ========= ========= ==============================
The variable 'tmp_table' below is used to see if the source
table is a temporary table: if it is set, then the source table
was a temporary table and we can take apropriate actions.
*/
if (!(create_info->options & HA_LEX_CREATE_TMP_TABLE))
{
if (tmp_table) // Case 2
{
char buf[2048];
String query(buf, sizeof(buf), system_charset_info);
query.length(0); // Have to zero it since constructor doesn't
TABLE *table_ptr;
int error;
/*
Let's open and lock the table: it will be closed (and
unlocked) by close_thread_tables() at the end of the
statement anyway.
*/
if (!(table_ptr= open_ltable(thd, table, TL_READ_NO_INSERT)))
goto err;
int result= store_create_info(thd, table, &query, create_info);
DBUG_ASSERT(result == 0); // store_create_info() always return 0
write_bin_log(thd, TRUE, query.ptr(), query.length());
}
else // Case 1
write_bin_log(thd, TRUE, thd->query, thd->query_length);
}
/*
Case 3 and 4 does nothing under RBR
*/
}
else
write_bin_log(thd, TRUE, thd->query, thd->query_length);
res= FALSE;
goto err;
table_exists:
if (create_info->options & HA_LEX_CREATE_IF_NOT_EXISTS)
{
char warn_buff[MYSQL_ERRMSG_SIZE];
my_snprintf(warn_buff, sizeof(warn_buff),
ER(ER_TABLE_EXISTS_ERROR), table_name);
push_warning(thd, MYSQL_ERROR::WARN_LEVEL_NOTE,
ER_TABLE_EXISTS_ERROR,warn_buff);
res= FALSE;
}
else
my_error(ER_TABLE_EXISTS_ERROR, MYF(0), table_name);
err:
pthread_mutex_lock(&LOCK_open);
unlock_table_name(thd, &src_tables_list);
pthread_mutex_unlock(&LOCK_open);
DBUG_RETURN(res);
}
bool 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, 0,
&handler::analyze, 0));
}
bool 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, 0,
&handler::check, &view_checksum));
}
/* table_list should contain just one table */
static 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";
discard= test(tablespace_op == DISCARD_TABLESPACE);
/*
We set this flag so that ha_innobase::open and ::external_lock() do
not complain when we lock the table
*/
thd->tablespace_op= TRUE;
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;
write_bin_log(thd, FALSE, thd->query, thd->query_length);
err:
close_thread_tables(thd);
thd->tablespace_op=FALSE;
if (error == 0)
{
send_ok(thd);
DBUG_RETURN(0);
}
table->file->print_error(error, MYF(0));
DBUG_RETURN(-1);
}
#ifdef NOT_USED
/*
CREATE INDEX and DROP INDEX are implemented by calling ALTER TABLE with
the proper arguments. This isn't very fast but it should work for most
cases.
One should normally create all indexes with CREATE TABLE or ALTER TABLE.
*/
int mysql_create_indexes(THD *thd, TABLE_LIST *table_list, List<Key> &keys)
{
List<create_field> fields;
List<Alter_drop> drop;
List<Alter_column> alter;
HA_CREATE_INFO create_info;
int rc;
uint idx;
uint db_options;
uint key_count;
TABLE *table;
Field **f_ptr;
KEY *key_info_buffer;
char path[FN_REFLEN+1];
DBUG_ENTER("mysql_create_index");
/*
Try to use online generation of index.
This requires that all indexes can be created online.
Otherwise, the old alter table procedure is executed.
Open the table to have access to the correct table handler.
*/
if (!(table=open_ltable(thd,table_list,TL_WRITE_ALLOW_READ)))
DBUG_RETURN(-1);
/*
The add_index method takes an array of KEY structs for the new indexes.
Preparing a new table structure generates this array.
It needs a list with all fields of the table, which does not need to
be correct in every respect. The field names are important.
*/
for (f_ptr= table->field; *f_ptr; f_ptr++)
{
create_field *c_fld= new create_field(*f_ptr, *f_ptr);
c_fld->unireg_check= Field::NONE; /*avoid multiple auto_increments*/
fields.push_back(c_fld);
}
bzero((char*) &create_info,sizeof(create_info));
create_info.db_type= (handlerton*) &default_hton;
create_info.default_table_charset= thd->variables.collation_database;
db_options= 0;
if (mysql_prepare_table(thd, &create_info, &fields,
&keys, /*tmp_table*/ 0, &db_options, table->file,
&key_info_buffer, key_count,
/*select_field_count*/ 0))
DBUG_RETURN(-1);
/*
Check if all keys can be generated with the add_index method.
If anyone cannot, then take the old way.
*/
for (idx=0; idx< key_count; idx++)
{
DBUG_PRINT("info", ("creating index %s", key_info_buffer[idx].name));
if (!(table->file->index_ddl_flags(key_info_buffer+idx)&
(HA_DDL_ONLINE| HA_DDL_WITH_LOCK)))
break ;
}
if ((idx < key_count)|| !key_count)
{
/* Re-initialize the create_info, which was changed by prepare table. */
bzero((char*) &create_info,sizeof(create_info));
create_info.db_type= (handlerton*) &default_hton;
create_info.default_table_charset= thd->variables.collation_database;
/* Cleanup the fields list. We do not want to create existing fields. */
fields.delete_elements();
if (real_alter_table(thd, table_list->db, table_list->table_name,
&create_info, table_list, table,
fields, keys, drop, alter, 0, (ORDER*)0,
ALTER_ADD_INDEX, DUP_ERROR))
/* Don't need to free((gptr) key_info_buffer);*/
DBUG_RETURN(-1);
}
else
{
if (table->file->add_index(table, key_info_buffer, key_count)||
build_table_filename(path, sizeof(path), table_list->db,
(lower_case_table_names == 2) ?
table_list->alias : table_list->table_name,
reg_ext) == 0 ||
mysql_create_frm(thd, path, &create_info,
fields, key_count, key_info_buffer, table->file))
/* don't need to free((gptr) key_info_buffer);*/
DBUG_RETURN(-1);
}
/* don't need to free((gptr) key_info_buffer);*/
DBUG_RETURN(0);
}
int mysql_drop_indexes(THD *thd, TABLE_LIST *table_list,
List<Alter_drop> &drop)
{
List<create_field> fields;
List<Key> keys;
List<Alter_column> alter;
HA_CREATE_INFO create_info;
uint idx;
uint db_options;
uint key_count;
uint *key_numbers;
TABLE *table;
Field **f_ptr;
KEY *key_info;
KEY *key_info_buffer;
char path[FN_REFLEN];
DBUG_ENTER("mysql_drop_index");
/*
Try to use online generation of index.
This requires that all indexes can be created online.
Otherwise, the old alter table procedure is executed.
Open the table to have access to the correct table handler.
*/
if (!(table=open_ltable(thd,table_list,TL_WRITE_ALLOW_READ)))
DBUG_RETURN(-1);
/*
The drop_index method takes an array of key numbers.
It cannot get more entries than keys in the table.
*/
key_numbers= (uint*) thd->alloc(sizeof(uint*)*table->keys);
key_count= 0;
/*
Get the number of each key and check if it can be created online.
*/
List_iterator<Alter_drop> drop_it(drop);
Alter_drop *drop_key;
while ((drop_key= drop_it++))
{
/* Find the key in the table. */
key_info=table->key_info;
for (idx=0; idx< table->keys; idx++, key_info++)
{
if (!my_strcasecmp(system_charset_info, key_info->name, drop_key->name))
break;
}
if (idx>= table->keys)
{
my_error(ER_CANT_DROP_FIELD_OR_KEY, MYF(0), drop_key->name);
/*don't need to free((gptr) key_numbers);*/
DBUG_RETURN(-1);
}
/*
Check if the key can be generated with the add_index method.
If anyone cannot, then take the old way.
*/
DBUG_PRINT("info", ("dropping index %s", table->key_info[idx].name));
if (!(table->file->index_ddl_flags(table->key_info+idx)&
(HA_DDL_ONLINE| HA_DDL_WITH_LOCK)))
break ;
key_numbers[key_count++]= idx;
}
bzero((char*) &create_info,sizeof(create_info));
create_info.db_type= (handlerton*) &default_hton;
create_info.default_table_charset= thd->variables.collation_database;
if ((drop_key)|| (drop.elements<= 0))
{
if (real_alter_table(thd, table_list->db, table_list->table_name,
&create_info, table_list, table,
fields, keys, drop, alter, 0, (ORDER*)0,
ALTER_DROP_INDEX, DUP_ERROR))
/*don't need to free((gptr) key_numbers);*/
DBUG_RETURN(-1);
}
else
{
db_options= 0;
if (table->file->drop_index(table, key_numbers, key_count)||
mysql_prepare_table(thd, &create_info, &fields,
&keys, /*tmp_table*/ 0, &db_options, table->file,
&key_info_buffer, key_count,
/*select_field_count*/ 0)||
build_table_filename(path, sizeof(path), table_list->db,
(lower_case_table_names == 2) ?
table_list->alias : table_list->table_name,
reg_ext) == 0 ||
mysql_create_frm(thd, path, &create_info,
fields, key_count, key_info_buffer, table->file))
/*don't need to free((gptr) key_numbers);*/
DBUG_RETURN(-1);
}
/*don't need to free((gptr) key_numbers);*/
DBUG_RETURN(0);
}
#endif /* NOT_USED */
#define ALTER_TABLE_DATA_CHANGED 1
#define ALTER_TABLE_INDEX_CHANGED 2
/*
SYNOPSIS
compare tables()
table original table
create_list fields in new table
key_list keys in new table
create_info create options in new table
DESCRIPTION
'table' (first argument) contains information of the original
table, which includes all corresponding parts that the new
table has in arguments create_list, key_list and create_info.
By comparing the changes between the original and new table
we can determine how much it has changed after ALTER TABLE
and whether we need to make a copy of the table, or just change
the .frm file.
RETURN VALUES
0 No copy needed
1 Data changes, copy needed
2 Index changes, copy needed
*/
uint compare_tables(TABLE *table, List<create_field> *create_list,
List<Key> *key_list, HA_CREATE_INFO *create_info,
ALTER_INFO *alter_info, uint order_num)
{
Field **f_ptr, *field;
uint changes= 0, tmp;
List_iterator_fast<create_field> new_field_it(*create_list);
create_field *new_field;
/*
Some very basic checks. If number of fields changes, or the
handler, we need to run full ALTER TABLE. In the future
new fields can be added and old dropped without copy, but
not yet.
Test also that engine was not given during ALTER TABLE, or
we are force to run regular alter table (copy).
E.g. ALTER TABLE tbl_name ENGINE=MyISAM.
For the following ones we also want to run regular alter table:
ALTER TABLE tbl_name ORDER BY ..
ALTER TABLE tbl_name CONVERT TO CHARACTER SET ..
At the moment we can't handle altering temporary tables without a copy.
We also test if OPTIMIZE TABLE was given and was mapped to alter table.
In that case we always do full copy.
*/
if (table->s->fields != create_list->elements ||
table->s->db_type != create_info->db_type ||
table->s->tmp_table ||
create_info->used_fields & HA_CREATE_USED_ENGINE ||
create_info->used_fields & HA_CREATE_USED_CHARSET ||
create_info->used_fields & HA_CREATE_USED_DEFAULT_CHARSET ||
(alter_info->flags & ALTER_RECREATE) ||
order_num)
return ALTER_TABLE_DATA_CHANGED;
/*
Go through fields and check if the original ones are compatible
with new table.
*/
for (f_ptr= table->field, new_field= new_field_it++;
(field= *f_ptr); f_ptr++, new_field= new_field_it++)
{
/* Make sure we have at least the default charset in use. */
if (!new_field->charset)
new_field->charset= create_info->default_table_charset;
/* Check that NULL behavior is same for old and new fields */
if ((new_field->flags & NOT_NULL_FLAG) !=
(uint) (field->flags & NOT_NULL_FLAG))
return ALTER_TABLE_DATA_CHANGED;
/* Don't pack rows in old tables if the user has requested this. */
if (create_info->row_type == ROW_TYPE_DYNAMIC ||
(new_field->flags & BLOB_FLAG) ||
new_field->sql_type == MYSQL_TYPE_VARCHAR &&
create_info->row_type != ROW_TYPE_FIXED)
create_info->table_options|= HA_OPTION_PACK_RECORD;
/* Evaluate changes bitmap and send to check_if_incompatible_data() */
if (!(tmp= field->is_equal(new_field)))
return ALTER_TABLE_DATA_CHANGED;
changes|= tmp;
}
/* Check if changes are compatible with current handler without a copy */
if (table->file->check_if_incompatible_data(create_info, changes))
return ALTER_TABLE_DATA_CHANGED;
/*
Go through keys and check if the original ones are compatible
with new table.
*/
KEY *table_key_info= table->key_info;
List_iterator_fast<Key> key_it(*key_list);
Key *key= key_it++;
/* Check if the number of key elements has changed */
if (table->s->keys != key_list->elements)
return ALTER_TABLE_INDEX_CHANGED;
for (uint i= 0; i < table->s->keys; i++, table_key_info++, key= key_it++)
{
/*
Check that the key types are compatible between old and new tables.
*/
if (table_key_info->algorithm != key->algorithm ||
((key->type == Key::PRIMARY || key->type == Key::UNIQUE) &&
!(table_key_info->flags & HA_NOSAME)) ||
(!(key->type == Key::PRIMARY || key->type == Key::UNIQUE) &&
(table_key_info->flags & HA_NOSAME)) ||
((key->type == Key::SPATIAL) &&
!(table_key_info->flags & HA_SPATIAL)) ||
(!(key->type == Key::SPATIAL) &&
(table_key_info->flags & HA_SPATIAL)) ||
((key->type == Key::FULLTEXT) &&
!(table_key_info->flags & HA_FULLTEXT)) ||
(!(key->type == Key::FULLTEXT) &&
(table_key_info->flags & HA_FULLTEXT)))
return ALTER_TABLE_INDEX_CHANGED;
if (table_key_info->key_parts != key->columns.elements)
return ALTER_TABLE_INDEX_CHANGED;
/*
Check that the key parts remain compatible between the old and
new tables.
*/
KEY_PART_INFO *table_key_part= table_key_info->key_part;
List_iterator_fast<key_part_spec> key_part_it(key->columns);
key_part_spec *key_part= key_part_it++;
for (uint j= 0; j < table_key_info->key_parts; j++,
table_key_part++, key_part= key_part_it++)
{
/*
Key definition has changed if we are using a different field or
if the used key length is different
(If key_part->length == 0 it means we are using the whole field)
*/
if (strcmp(key_part->field_name, table_key_part->field->field_name) ||
(key_part->length && key_part->length != table_key_part->length) ||
(key_part->length == 0 && table_key_part->length !=
table_key_part->field->pack_length()))
return ALTER_TABLE_INDEX_CHANGED;
}
}
return 0; // Tables are compatible
}
/*
Alter table
*/
bool 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,
uint order_num, ORDER *order,
enum enum_duplicates handle_duplicates, bool ignore,
ALTER_INFO *alter_info, bool do_send_ok)
{
TABLE *table,*new_table=0;
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];
ha_rows copied,deleted;
ulonglong next_insert_id;
uint db_create_options, used_fields;
handlerton *old_db_type, *new_db_type;
uint need_copy_table= 0;
#ifdef WITH_PARTITION_STORAGE_ENGINE
bool online_add_empty_partition= FALSE;
bool online_drop_partition= FALSE;
bool partition_changed= FALSE;
handlerton *default_engine_type;
#endif
DBUG_ENTER("mysql_alter_table");
thd->proc_info="init";
table_name=table_list->table_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_flush(thd, table_list, MYSQL_HA_CLOSE_FINAL, FALSE);
/* DISCARD/IMPORT TABLESPACE is always alone in an ALTER TABLE */
if (alter_info->tablespace_op != NO_TABLESPACE_OP)
DBUG_RETURN(mysql_discard_or_import_tablespace(thd,table_list,
alter_info->tablespace_op));
if (!(table=open_ltable(thd,table_list,TL_WRITE_ALLOW_READ)))
DBUG_RETURN(TRUE);
/* 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(files_charset_info, new_name_buff);
new_alias= new_name; // Create lower case table name
}
my_casedn_str(files_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->s->tmp_table != NO_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(TRUE);
}
}
else
{
char dir_buff[FN_REFLEN];
strxnmov(dir_buff, sizeof(dir_buff)-1,
mysql_real_data_home, new_db, NullS);
if (!access(fn_format(new_name_buff,new_name_buff,dir_buff,reg_ext,0),
F_OK))
{
/* Table will be closed in do_command() */
my_error(ER_TABLE_EXISTS_ERROR, MYF(0), new_alias);
DBUG_RETURN(TRUE);
}
}
}
}
else
{
new_alias= (lower_case_table_names == 2) ? alias : table_name;
new_name= table_name;
}
old_db_type= table->s->db_type;
if (create_info->db_type == (handlerton*) &default_hton)
create_info->db_type= old_db_type;
#ifdef WITH_PARTITION_STORAGE_ENGINE
/*
We need to handle both partition management command such as Add Partition
and others here as well as an ALTER TABLE that completely changes the
partitioning and yet others that don't change anything at all. We start
by checking the partition management variants and then check the general
change patterns.
*/
if (alter_info->flags & (ALTER_ADD_PARTITION +
ALTER_DROP_PARTITION + ALTER_COALESCE_PARTITION +
ALTER_REORGANISE_PARTITION))
{
partition_info *tab_part_info= table->part_info;
if (!tab_part_info)
{
my_error(ER_PARTITION_MGMT_ON_NONPARTITIONED, MYF(0));
DBUG_RETURN(TRUE);
}
default_engine_type= tab_part_info->default_engine_type;
/*
We are going to manipulate the partition info on the table object
so we need to ensure that the data structure of the table object
is freed by setting version to 0.
*/
table->s->version= 0L;
if (alter_info->flags == ALTER_ADD_PARTITION)
{
/*
We start by moving the new partitions to the list of temporary
partitions. We will then check that the new partitions fit in the
partitioning scheme as currently set-up.
Partitions are always added at the end in ADD PARTITION.
*/
partition_info *alt_part_info= thd->lex->part_info;
uint no_new_partitions= alt_part_info->no_parts;
uint no_orig_partitions= tab_part_info->no_parts;
uint check_total_partitions= no_new_partitions + no_orig_partitions;
uint new_total_partitions= check_total_partitions;
/*
We allow quite a lot of values to be supplied by defaults, however we
must know the number of new partitions in this case.
*/
if (no_new_partitions == 0)
{
my_error(ER_ADD_PARTITION_NO_NEW_PARTITION, MYF(0));
DBUG_RETURN(TRUE);
}
if (is_sub_partitioned(tab_part_info))
{
if (alt_part_info->no_subparts == 0)
alt_part_info->no_subparts= tab_part_info->no_subparts;
else if (alt_part_info->no_subparts != tab_part_info->no_subparts)
{
my_error(ER_ADD_PARTITION_SUBPART_ERROR, MYF(0));
DBUG_RETURN(TRUE);
}
check_total_partitions= new_total_partitions*
alt_part_info->no_subparts;
}
if (check_total_partitions > MAX_PARTITIONS)
{
my_error(ER_TOO_MANY_PARTITIONS_ERROR, MYF(0));
DBUG_RETURN(TRUE);
}
alt_part_info->part_type= tab_part_info->part_type;
if (set_up_defaults_for_partitioning(alt_part_info,
table->file,
(ulonglong)0ULL,
tab_part_info->no_parts))
{
DBUG_RETURN(TRUE);
}
/*
Need to concatenate the lists here to make it possible to check the
partition info for correctness using check_partition_info
*/
{
List_iterator<partition_element> alt_it(alt_part_info->partitions);
uint part_count= 0;
do
{
partition_element *part_elem= alt_it++;
tab_part_info->partitions.push_back(part_elem);
tab_part_info->temp_partitions.push_back(part_elem);
} while (++part_count < no_new_partitions);
tab_part_info->no_parts+= no_new_partitions;
}
{
List_iterator<partition_element> tab_it(tab_part_info->partitions);
partition_element *part_elem= tab_it++;
if (is_sub_partitioned(tab_part_info))
{
List_iterator<partition_element> sub_it(part_elem->subpartitions);
part_elem= sub_it++;
}
if (check_partition_info(tab_part_info, part_elem->engine_type,
table->file, (ulonglong)0ULL))
{
DBUG_RETURN(TRUE);
}
}
create_info->db_type= &partition_hton;
thd->lex->part_info= tab_part_info;
if (table->file->alter_table_flags() & HA_ONLINE_ADD_EMPTY_PARTITION &&
(tab_part_info->part_type == RANGE_PARTITION ||
tab_part_info->part_type == LIST_PARTITION))
{
/*
For range and list partitions add partition is simply adding a new
empty partition to the table. If the handler support this we will
use the simple method of doing this. In this case we need to break
out the new partitions from the list again and only keep them in the
temporary list. Added partitions are always added at the end.
*/
{
List_iterator<partition_element> tab_it(tab_part_info->partitions);
uint part_count= 0;
do
{
tab_it++;
} while (++part_count < no_orig_partitions);
do
{
tab_it++;
tab_it.remove();
} while (++part_count < new_total_partitions);
}
tab_part_info->no_parts-= no_new_partitions;
online_add_empty_partition= TRUE;
}
else
{
tab_part_info->temp_partitions.empty();
}
}
else if (alter_info->flags == ALTER_DROP_PARTITION)
{
/*
Drop a partition from a range partition and list partitioning is
always safe and can be made more or less immediate. It is necessary
however to ensure that the partition to be removed is safely removed
and that REPAIR TABLE can remove the partition if for some reason the
command to drop the partition failed in the middle.
*/
uint part_count= 0;
uint no_parts_dropped= alter_info->partition_names.elements;
uint no_parts_found= 0;
List_iterator<partition_element> part_it(tab_part_info->partitions);
if (!(tab_part_info->part_type == RANGE_PARTITION ||
tab_part_info->part_type == LIST_PARTITION))
{
my_error(ER_ONLY_ON_RANGE_LIST_PARTITION, MYF(0), "DROP");
DBUG_RETURN(TRUE);
}
if (no_parts_dropped >= tab_part_info->no_parts)
{
my_error(ER_DROP_LAST_PARTITION, MYF(0));
DBUG_RETURN(TRUE);
}
do
{
partition_element *part_elem= part_it++;
if (is_partition_in_list(part_elem->partition_name,
alter_info->partition_names))
{
/*
Remove the partition from the list and put it instead in the
list of temporary partitions with a new state.
*/
no_parts_found++;
part_elem->part_state= PART_IS_DROPPED;
}
} while (++part_count < tab_part_info->no_parts);
if (no_parts_found != no_parts_dropped)
{
my_error(ER_DROP_PARTITION_NON_EXISTENT, MYF(0));
DBUG_RETURN(TRUE);
}
if (!(table->file->alter_table_flags() & HA_ONLINE_DROP_PARTITION))
{
my_error(ER_DROP_PARTITION_FAILURE, MYF(0));
DBUG_RETURN(TRUE);
}
if (table->file->is_fk_defined_on_table_or_index(MAX_KEY))
{
my_error(ER_DROP_PARTITION_WHEN_FK_DEFINED, MYF(0));
DBUG_RETURN(TRUE);
}
/*
This code needs set-up of structures needed by mysql_create_table
before it is called and thus we only set a boolean variable to be
checked later down in the code when all needed data structures are
prepared.
*/
online_drop_partition= TRUE;
}
else if (alter_info->flags == ALTER_COALESCE_PARTITION)
{
/*
In this version COALESCE PARTITION is implemented by simply removing
a partition from the table and using the normal ALTER TABLE code
and ensuring that copy to a new table occurs. Later on we can optimise
this function for Linear Hash partitions. In that case we can avoid
reorganising the entire table. For normal hash partitions it will
be a complete reorganise anyways so that can only be made on-line
if it still uses a copy table.
*/
uint part_count= 0;
uint no_parts_coalesced= alter_info->no_parts;
uint no_parts_remain= tab_part_info->no_parts - no_parts_coalesced;
List_iterator<partition_element> part_it(tab_part_info->partitions);
if (tab_part_info->part_type != HASH_PARTITION)
{
my_error(ER_COALESCE_ONLY_ON_HASH_PARTITION, MYF(0));
DBUG_RETURN(TRUE);
}
if (no_parts_coalesced == 0)
{
my_error(ER_COALESCE_PARTITION_NO_PARTITION, MYF(0));
DBUG_RETURN(TRUE);
}
if (no_parts_coalesced >= tab_part_info->no_parts)
{
my_error(ER_DROP_LAST_PARTITION, MYF(0));
DBUG_RETURN(TRUE);
}
do
{
part_it++;
if (++part_count > no_parts_remain)
part_it.remove();
} while (part_count < tab_part_info->no_parts);
tab_part_info->no_parts= no_parts_remain;
}
else if (alter_info->flags == ALTER_REORGANISE_PARTITION)
{
/*
Reorganise partitions takes a number of partitions that are next
to each other (at least for RANGE PARTITIONS) and then uses those
to create a set of new partitions. So data is copied from those
partitions into the new set of partitions. Those new partitions
can have more values in the LIST value specifications or less both
are allowed. The ranges can be different but since they are
changing a set of consecutive partitions they must cover the same
range as those changed from.
This command can be used on RANGE and LIST partitions.
*/
uint no_parts_reorged= alter_info->partition_names.elements;
uint no_parts_new= thd->lex->part_info->partitions.elements;
partition_info *alt_part_info= thd->lex->part_info;
uint check_total_partitions;
if (no_parts_reorged > tab_part_info->no_parts)
{
my_error(ER_REORG_PARTITION_NOT_EXIST, MYF(0));
DBUG_RETURN(TRUE);
}
if (!(tab_part_info->part_type == RANGE_PARTITION ||
tab_part_info->part_type == LIST_PARTITION))
{
my_error(ER_ONLY_ON_RANGE_LIST_PARTITION, MYF(0), "REORGANISE");
DBUG_RETURN(TRUE);
}
if (check_reorganise_list(alt_part_info, tab_part_info,
alter_info->partition_names))
{
my_error(ER_SAME_NAME_PARTITION, MYF(0));
DBUG_RETURN(TRUE);
}
check_total_partitions= tab_part_info->no_parts + no_parts_new;
check_total_partitions-= no_parts_reorged;
if (check_total_partitions > MAX_PARTITIONS)
{
my_error(ER_TOO_MANY_PARTITIONS_ERROR, MYF(0));
DBUG_RETURN(TRUE);
}
{
List_iterator<partition_element> tab_it(tab_part_info->partitions);
uint part_count= 0;
bool found_first= FALSE, found_last= FALSE;
uint drop_count= 0;
longlong tab_max_range, alt_max_range;
do
{
partition_element *part_elem= tab_it++;
if (is_partition_in_list(part_elem->partition_name,
alter_info->partition_names))
{
drop_count++;
tab_max_range= part_elem->range_value;
if (!found_first)
{
uint alt_part_count= 0;
found_first= TRUE;
List_iterator<partition_element> alt_it(alt_part_info->partitions);
do
{
partition_element *alt_part_elem= alt_it++;
alt_max_range= alt_part_elem->range_value;
if (alt_part_count == 0)
tab_it.replace(alt_part_elem);
else
tab_it.after(alt_part_elem);
} while (++alt_part_count < no_parts_new);
}
else if (found_last)
{
my_error(ER_CONSECUTIVE_REORG_PARTITIONS, MYF(0));
DBUG_RETURN(TRUE);
}
else
tab_it.remove();
}
else
{
if (found_first)
found_last= TRUE;
}
} while (++part_count < tab_part_info->no_parts);
if (drop_count != no_parts_reorged)
{
my_error(ER_DROP_PARTITION_NON_EXISTENT, MYF(0));
DBUG_RETURN(TRUE);
}
if (tab_part_info->part_type == RANGE_PARTITION &&
alt_max_range > tab_max_range)
{
my_error(ER_REORG_OUTSIDE_RANGE, MYF(0));
DBUG_RETURN(TRUE);
}
}
}
partition_changed= TRUE;
tab_part_info->no_parts= tab_part_info->partitions.elements;
create_info->db_type= &partition_hton;
thd->lex->part_info= tab_part_info;
if (alter_info->flags == ALTER_ADD_PARTITION ||
alter_info->flags == ALTER_REORGANISE_PARTITION)
{
if (check_partition_info(tab_part_info, default_engine_type,
table->file, (ulonglong)0ULL))
{
DBUG_RETURN(TRUE);
}
}
}
else
{
/*
When thd->lex->part_info has a reference to a partition_info the
ALTER TABLE contained a definition of a partitioning.
Case I:
If there was a partition before and there is a new one defined.
We use the new partitioning. The new partitioning is already
defined in the correct variable so no work is needed to
accomplish this.
We do however need to update partition_changed to ensure that not
only the frm file is changed in the ALTER TABLE command.
Case IIa:
There was a partitioning before and there is no new one defined.
Also the user has not specified an explicit engine to use.
We use the old partitioning also for the new table. We do this
by assigning the partition_info from the table loaded in
open_ltable to the partition_info struct used by mysql_create_table
later in this method.
Case IIb:
There was a partitioning before and there is no new one defined.
The user has specified an explicit engine to use.
Since the user has specified an explicit engine to use we override
the old partitioning info and create a new table using the specified
engine. This is the reason for the extra check if old and new engine
is equal.
In this case the partition also is changed.
Case III:
There was no partitioning before altering the table, there is
partitioning defined in the altered table. Use the new partitioning.
No work needed since the partitioning info is already in the
correct variable.
Also here partition has changed and thus a new table must be
created.
Case IV:
There was no partitioning before and no partitioning defined.
Obviously no work needed.
*/
if (table->part_info)
{
if (!thd->lex->part_info &&
create_info->db_type == old_db_type)
thd->lex->part_info= table->part_info;
}
if (thd->lex->part_info)
{
/*
Need to cater for engine types that can handle partition without
using the partition handler.
*/
if (thd->lex->part_info != table->part_info)
partition_changed= TRUE;
if (create_info->db_type != &partition_hton)
thd->lex->part_info->default_engine_type= create_info->db_type;
create_info->db_type= &partition_hton;
}
}
#endif
if (check_engine(thd, new_name, &create_info->db_type))
DBUG_RETURN(TRUE);
new_db_type= create_info->db_type;
if (create_info->row_type == ROW_TYPE_NOT_USED)
create_info->row_type= table->s->row_type;
DBUG_PRINT("info", ("old type: %d new type: %d", old_db_type, new_db_type));
if (ha_check_storage_engine_flag(old_db_type, HTON_ALTER_NOT_SUPPORTED) ||
ha_check_storage_engine_flag(new_db_type, HTON_ALTER_NOT_SUPPORTED))
{
DBUG_PRINT("info", ("doesn't support alter"));
my_error(ER_ILLEGAL_HA, MYF(0), table_name);
DBUG_RETURN(TRUE);
}
thd->proc_info="setup";
if (!(alter_info->flags & ~(ALTER_RENAME | ALTER_KEYS_ONOFF)) &&
!table->s->tmp_table) // no need to touch frm
{
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;
table->s->version= 0; // Force removal of table def
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 (alter_info->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->enable_indexes(HA_KEY_SWITCH_NONUNIQ_SAVE);
/* COND_refresh will be signaled in close_thread_tables() */
break;
case DISABLE:
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->disable_indexes(HA_KEY_SWITCH_NONUNIQ_SAVE);
/* COND_refresh will be signaled in close_thread_tables() */
break;
}
}
if (error == HA_ERR_WRONG_COMMAND)
{
push_warning_printf(thd, MYSQL_ERROR::WARN_LEVEL_NOTE,
ER_ILLEGAL_HA, ER(ER_ILLEGAL_HA),
table->alias);
error=0;
}
if (!error)
{
write_bin_log(thd, TRUE, thd->query, thd->query_length);
if (do_send_ok)
send_ok(thd);
}
else if (error > 0)
{
table->file->print_error(error, MYF(0));
error= -1;
}
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->s->min_rows;
if (!(used_fields & HA_CREATE_USED_MAX_ROWS))
create_info->max_rows= table->s->max_rows;
if (!(used_fields & HA_CREATE_USED_AVG_ROW_LENGTH))
create_info->avg_row_length= table->s->avg_row_length;
if (!(used_fields & HA_CREATE_USED_DEFAULT_CHARSET))
create_info->default_table_charset= table->s->table_charset;
restore_record(table, s->default_values); // Empty record for DEFAULT
List_iterator<Alter_drop> drop_it(alter_info->drop_list);
List_iterator<create_field> def_it(fields);
List_iterator<Alter_column> alter_it(alter_info->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 dropped */
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->after)
{
create_list.push_back(def);
def_it.remove();
}
}
else // This field was not dropped and not changed, add it to the list
{ // for the new table.
create_list.push_back(def=new create_field(field,field));
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(TRUE);
}
if ((def->def=alter->def)) // Use new default
def->flags&= ~NO_DEFAULT_VALUE_FLAG;
else
def->flags|= NO_DEFAULT_VALUE_FLAG;
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(TRUE);
}
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(TRUE);
}
find_it.after(def); // Put element after this
}
}
if (alter_info->alter_list.elements)
{
my_error(ER_BAD_FIELD_ERROR, MYF(0),
alter_info->alter_list.head()->name, table_name);
DBUG_RETURN(TRUE);
}
if (!create_list.elements)
{
my_message(ER_CANT_REMOVE_ALL_FIELDS, ER(ER_CANT_REMOVE_ALL_FIELDS),
MYF(0));
DBUG_RETURN(TRUE);
}
/*
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->s->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
{
/*
If the field can't have only a part used in a key according to its
new type, or should not be used partially according to its
previous type, or the field length is less than the key part
length, unset the key part length.
We also unset the key part length if it is the same as the
old field's length, so the whole new field will be used.
BLOBs may have cfield->length == 0, which is why we test it before
checking whether cfield->length < key_part_length (in chars).
*/
if (!Field::type_can_have_key_part(cfield->field->type()) ||
!Field::type_can_have_key_part(cfield->sql_type) ||
(cfield->field->field_length == key_part_length &&
!f_is_blob(key_part->key_type)) ||
(cfield->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,
test(key_info->flags & HA_GENERATED_KEY),
key_parts,
key_info->flags & HA_USES_PARSER ?
&key_info->parser->name : 0));
}
{
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(TRUE);
}
}
}
if (alter_info->drop_list.elements)
{
my_error(ER_CANT_DROP_FIELD_OR_KEY, MYF(0),
alter_info->drop_list.head()->name);
goto err;
}
if (alter_info->alter_list.elements)
{
my_error(ER_CANT_DROP_FIELD_OR_KEY, MYF(0),
alter_info->alter_list.head()->name);
goto err;
}
db_create_options= table->s->db_create_options & ~(HA_OPTION_PACK_RECORD);
my_snprintf(tmp_name, sizeof(tmp_name), "%s-%lx_%lx", tmp_file_prefix,
current_pid, thd->thread_id);
/* Safety fix for innodb */
if (lower_case_table_names)
my_casedn_str(files_charset_info, tmp_name);
if (new_db_type != old_db_type && !table->file->can_switch_engines()) {
my_error(ER_ROW_IS_REFERENCED, MYF(0));
goto err;
}
create_info->db_type=new_db_type;
if (!create_info->comment)
create_info->comment= table->s->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->s->tmp_table)
create_info->options|=HA_LEX_CREATE_TMP_TABLE;
set_table_default_charset(thd, create_info, db);
#ifdef WITH_PARTITION_STORAGE_ENGINE
if (thd->variables.old_alter_table || partition_changed)
#else
if (thd->variables.old_alter_table)
#endif
need_copy_table= 1;
else
need_copy_table= compare_tables(table, &create_list, &key_list,
create_info, alter_info, order_num);
/*
better have a negative test here, instead of positive, like
alter_info->flags & ALTER_ADD_COLUMN|ALTER_ADD_INDEX|...
so that ALTER TABLE won't break when somebody will add new flag
*/
if (!need_copy_table)
create_info->frm_only= 1;
#ifdef WITH_PARTITION_STORAGE_ENGINE
if (partition_changed)
{
if (online_drop_partition)
{
/*
Now after all checks and setting state on dropped partitions we can
start the actual dropping of the partitions.
1) Lock table in TL_WRITE_ONLY to ensure all other accesses on table
are completed and no new ones are started until we have changed
the frm file.
2) Write the new frm file where state of dropped partitions is
changed to PART_IS_DROPPED
3) Perform the actual drop of the partition using the handler of the
table.
4) Write a new frm file of the table where the partitions are dropped
from the table.
*/
uint old_lock_type;
partition_info *part_info= table->part_info;
char path[FN_REFLEN+1], noext_path[FN_REFLEN+1];
uint db_options= 0, key_count, syntax_len;
KEY *key_info_buffer;
char *part_syntax_buf;
VOID(pthread_mutex_lock(&LOCK_open));
if (abort_and_upgrade_lock(thd, table, db, table_name, &old_lock_type))
{
DBUG_RETURN(TRUE);
}
VOID(pthread_mutex_unlock(&LOCK_open));
mysql_prepare_table(thd, create_info, &create_list,
&key_list, /*tmp_table*/ 0, &db_options,
table->file, &key_info_buffer, &key_count,
/*select_field_count*/ 0);
if (!(part_syntax_buf= generate_partition_syntax(part_info,
&syntax_len,
TRUE,TRUE)))
{
DBUG_RETURN(TRUE);
}
part_info->part_info_string= part_syntax_buf;
part_info->part_info_len= syntax_len;
build_table_filename(path, sizeof(path), db, table_name, reg_ext);
if (mysql_create_frm(thd, path, db, table_name, create_info,
create_list, key_count, key_info_buffer,
table->file))
{
DBUG_RETURN(TRUE);
}
thd->lex->part_info= part_info;
build_table_filename(path, sizeof(path), db, table_name, "");
if (table->file->drop_partitions(path))
{
DBUG_RETURN(TRUE);
}
{
List_iterator<partition_element> part_it(part_info->partitions);
uint i= 0, remove_count= 0;
do
{
partition_element *part_elem= part_it++;
if (is_partition_in_list(part_elem->partition_name,
alter_info->partition_names))
{
part_it.remove();
remove_count++;
}
} while (++i < part_info->no_parts);
part_info->no_parts-= remove_count;
}
if (!(part_syntax_buf= generate_partition_syntax(part_info,
&syntax_len,
TRUE,TRUE)))
{
DBUG_RETURN(TRUE);
}
part_info->part_info_string= part_syntax_buf;
part_info->part_info_len= syntax_len;
build_table_filename(path, sizeof(path), db, table_name, reg_ext);
build_table_filename(noext_path, sizeof(noext_path), db, table_name, "");
if (mysql_create_frm(thd, path, db, table_name, create_info,
create_list, key_count, key_info_buffer,
table->file) ||
table->file->create_handler_files(noext_path))
{
DBUG_RETURN(TRUE);
}
thd->proc_info="end";
query_cache_invalidate3(thd, table_list, 0);
error= ha_commit_stmt(thd);
if (ha_commit(thd))
error= 1;
if (!error)
{
close_thread_tables(thd);
write_bin_log(thd, FALSE, thd->query, thd->query_length);
send_ok(thd);
DBUG_RETURN(FALSE);
}
DBUG_RETURN(error);
}
}
#endif
/*
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;
/* We don't log the statement, it will be logged later. */
{
tmp_disable_binlog(thd);
error= mysql_create_table(thd, new_db, tmp_name,
create_info,create_list,key_list,1,0);
reenable_binlog(thd);
if (error)
DBUG_RETURN(error);
}
if (need_copy_table)
{
if (table->s->tmp_table)
{
TABLE_LIST tbl;
bzero((void*) &tbl, sizeof(tbl));
tbl.db= new_db;
tbl.table_name= tbl.alias= tmp_name;
/* Table is in thd->temporary_tables */
new_table= open_table(thd, &tbl, thd->mem_root, (bool*) 0,
MYSQL_LOCK_IGNORE_FLUSH);
}
else
{
char path[FN_REFLEN];
/* table is a normal table: Create temporary table in same directory */
build_table_filename(path, sizeof(path), new_db, tmp_name, "");
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;
}
}
/* We don't want update TIMESTAMP fields during ALTER TABLE. */
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 logging
copied=deleted=0;
if (new_table && !(new_table->file->table_flags() & HA_NO_COPY_ON_ALTER))
{
new_table->timestamp_field_type= TIMESTAMP_NO_AUTO_SET;
new_table->next_number_field=new_table->found_next_number_field;
error=copy_data_between_tables(table,new_table,create_list,
handle_duplicates, ignore,
order_num, order, &copied, &deleted);
}
thd->last_insert_id=next_insert_id; // Needed for correct log
thd->count_cuted_fields= CHECK_FIELD_IGNORE;
if (table->s->tmp_table != NO_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_table, 1, 1);
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, 1, 1);
/* Should pass the 'new_name' as we store table name in the cache */
if (rename_temporary_table(thd, new_table, new_db, new_name))
{ // Fatal error
close_temporary_table(thd, new_table, 1, 1);
my_free((gptr) new_table,MYF(0));
goto err;
}
/* We don't replicate alter table statement on temporary tables */
if (!binlog_row_based)
write_bin_log(thd, TRUE, thd->query, thd->query_length);
goto end_temporary;
}
if (new_table)
{
/* close temporary table that will be the new table */
intern_close_table(new_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 cache, free all locks, close the old table and remove it.
*/
thd->proc_info="rename result table";
my_snprintf(old_name, sizeof(old_name), "%s2-%lx-%lx", tmp_file_prefix,
current_pid, thd->thread_id);
if (lower_case_table_names)
my_casedn_str(files_charset_info, old_name);
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
table->s->version= 0; // Force removal of table def
close_cached_table(thd, table);
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 (!need_copy_table)
new_db_type=old_db_type= NULL; // this type cannot happen in regular ALTER
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)
{
table->s->version= 0; // Force removal of table def
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)
{
table->s->version= 0; // Force removal of table def
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
/* Mark in-use copies old */
remove_table_from_cache(thd,db,table_name,RTFC_NO_FLAG);
/* end threads waiting on lock */
mysql_lock_abort(thd,table);
}
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)
{
table->s->version= 0; // Force removal of table def
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";
DBUG_ASSERT(!(mysql_bin_log.is_open() && binlog_row_based &&
(create_info->options & HA_LEX_CREATE_TMP_TABLE)));
write_bin_log(thd, TRUE, thd->query, thd->query_length);
VOID(pthread_cond_broadcast(&COND_refresh));
VOID(pthread_mutex_unlock(&LOCK_open));
/*
TODO RONM: This problem needs to handled for Berkeley DB partitions
as well
*/
if (ha_check_storage_engine_flag(old_db_type,HTON_FLUSH_AFTER_RENAME))
{
/*
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];
build_table_filename(path, sizeof(path), new_db, table_name, "");
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_warning("Could not open table %s.%s after rename\n",
new_db,table_name);
ha_flush_logs(old_db_type);
}
table_list->table=0; // For query cache
query_cache_invalidate3(thd, table_list, 0);
end_temporary:
my_snprintf(tmp_name, sizeof(tmp_name), ER(ER_INSERT_INFO),
(ulong) (copied + deleted), (ulong) deleted,
(ulong) thd->cuted_fields);
if (do_send_ok)
send_ok(thd,copied+deleted,0L,tmp_name);
thd->some_tables_deleted=0;
DBUG_RETURN(FALSE);
err:
DBUG_RETURN(TRUE);
}
/* mysql_alter_table */
static int
copy_data_between_tables(TABLE *from,TABLE *to,
List<create_field> &create,
enum enum_duplicates handle_duplicates,
bool ignore,
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;
TABLE_LIST tables;
List<Item> fields;
List<Item> all_fields;
ha_rows examined_rows;
bool auto_increment_field_copied= 0;
ulong save_sql_mode;
DBUG_ENTER("copy_data_between_tables");
/*
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.
This needs to be done before external_lock
*/
error= ha_enable_transaction(thd, FALSE);
if (error)
DBUG_RETURN(-1);
if (!(copy= new Copy_field[to->s->fields]))
DBUG_RETURN(-1); /* purecov: inspected */
if (to->file->external_lock(thd, F_WRLCK))
DBUG_RETURN(-1);
/* We can abort alter table for any table type */
thd->no_trans_update= 0;
thd->abort_on_warning= !ignore && test(thd->variables.sql_mode &
(MODE_STRICT_TRANS_TABLES |
MODE_STRICT_ALL_TABLES));
from->file->info(HA_STATUS_VARIABLE);
to->file->start_bulk_insert(from->file->records);
save_sql_mode= thd->variables.sql_mode;
List_iterator<create_field> it(create);
create_field *def;
copy_end=copy;
for (Field **ptr=to->field ; *ptr ; ptr++)
{
def=it++;
if (def->field)
{
if (*ptr == to->next_number_field)
{
auto_increment_field_copied= TRUE;
/*
If we are going to copy contents of one auto_increment column to
another auto_increment column it is sensible to preserve zeroes.
This condition also covers case when we are don't actually alter
auto_increment column.
*/
if (def->field == from->found_next_number_field)
thd->variables.sql_mode|= MODE_NO_AUTO_VALUE_ON_ZERO;
}
(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.table_name= from->s->table_name.str;
tables.db= from->s->db.str;
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;
};
/*
Handler 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
*/
to->file->ha_set_all_bits_in_write_set();
from->file->ha_retrieve_all_cols();
init_read_record(&info, thd, from, (SQL_SELECT *) 0, 1,1);
if (ignore ||
handle_duplicates == DUP_REPLACE)
to->file->extra(HA_EXTRA_IGNORE_DUP_KEY);
thd->row_count= 0;
restore_record(to, s->default_values); // Create empty record
while (!(error=info.read_record(&info)))
{
if (thd->killed)
{
thd->send_kill_message();
error= 1;
break;
}
thd->row_count++;
if (to->next_number_field)
{
if (auto_increment_field_copied)
to->auto_increment_field_not_null= TRUE;
else
to->next_number_field->reset();
}
for (Copy_field *copy_ptr=copy ; copy_ptr != copy_end ; copy_ptr++)
{
copy_ptr->do_copy(copy_ptr);
}
if ((error=to->file->ha_write_row((byte*) to->record[0])))
{
if ((!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;
}
to->file->restore_auto_increment();
delete_count++;
}
else
found_count++;
}
end_read_record(&info);
free_io_cache(from);
delete [] copy; // This is never 0
if (to->file->end_bulk_insert() && error <= 0)
{
to->file->print_error(my_errno,MYF(0));
error=1;
}
to->file->extra(HA_EXTRA_NO_IGNORE_DUP_KEY);
ha_enable_transaction(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;
err:
thd->variables.sql_mode= save_sql_mode;
thd->abort_on_warning= 0;
free_io_cache(from);
*copied= found_count;
*deleted=delete_count;
if (to->file->external_lock(thd,F_UNLCK))
error=1;
DBUG_RETURN(error > 0 ? -1 : 0);
}
/*
Recreates tables by calling mysql_alter_table().
SYNOPSIS
mysql_recreate_table()
thd Thread handler
tables Tables to recreate
do_send_ok If we should send_ok() or leave it to caller
RETURN
Like mysql_alter_table().
*/
bool mysql_recreate_table(THD *thd, TABLE_LIST *table_list,
bool do_send_ok)
{
DBUG_ENTER("mysql_recreate_table");
LEX *lex= thd->lex;
HA_CREATE_INFO create_info;
lex->create_list.empty();
lex->key_list.empty();
lex->col_list.empty();
lex->alter_info.reset();
bzero((char*) &create_info,sizeof(create_info));
create_info.db_type= (handlerton*) &default_hton;
create_info.row_type=ROW_TYPE_NOT_USED;
create_info.default_table_charset=default_charset_info;
/* Force alter table to recreate table */
lex->alter_info.flags= (ALTER_CHANGE_COLUMN | ALTER_RECREATE);
DBUG_RETURN(mysql_alter_table(thd, NullS, NullS, &create_info,
table_list, lex->create_list,
lex->key_list, 0, (ORDER *) 0,
DUP_ERROR, 0, &lex->alter_info, do_send_ok));
}
bool 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,
Protocol::SEND_NUM_ROWS | Protocol::SEND_EOF))
DBUG_RETURN(TRUE);
for (table= tables; table; table= table->next_local)
{
char table_name[NAME_LEN*2+2];
TABLE *t;
strxmov(table_name, table->db ,".", table->table_name, NullS);
t= table->table= open_ltable(thd, table, TL_READ);
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->clear_error();
}
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;
uchar null_mask=256 - (1 << t->s->last_null_bit_pos);
/*
Set all bits in read set and inform InnoDB that we are reading all
fields
*/
t->file->ha_retrieve_all_cols();
if (t->file->ha_rnd_init(1))
protocol->store_null();
else
{
for (;;)
{
ha_checksum row_crc= 0;
int error= t->file->rnd_next(t->record[0]);
if (unlikely(error))
{
if (error == HA_ERR_RECORD_DELETED)
continue;
break;
}
if (t->s->null_bytes)
{
/* fix undefined null bits */
t->record[0][t->s->null_bytes-1] |= null_mask;
if (!(t->s->db_create_options & HA_OPTION_PACK_RECORD))
t->record[0][0] |= 1;
row_crc= my_checksum(row_crc, t->record[0], t->s->null_bytes);
}
for (uint i= 0; i < t->s->fields; i++ )
{
Field *f= t->field[i];
if (f->type() == FIELD_TYPE_BLOB)
{
String tmp;
f->val_str(&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);
t->file->ha_rnd_end();
}
}
thd->clear_error();
close_thread_tables(thd);
table->table=0; // For query cache
}
if (protocol->write())
goto err;
}
send_eof(thd);
DBUG_RETURN(FALSE);
err:
close_thread_tables(thd); // Shouldn't be needed
if (table)
table->table=0;
DBUG_RETURN(TRUE);
}
static bool check_engine(THD *thd, const char *table_name,
handlerton **new_engine)
{
handlerton *req_engine= *new_engine;
bool no_substitution=
test(thd->variables.sql_mode & MODE_NO_ENGINE_SUBSTITUTION);
if (!(*new_engine= ha_checktype(thd, ha_legacy_type(req_engine),
no_substitution, 1)))
return TRUE;
if (req_engine != (handlerton*) &default_hton && req_engine != *new_engine)
{
push_warning_printf(thd, MYSQL_ERROR::WARN_LEVEL_WARN,
ER_WARN_USING_OTHER_HANDLER,
ER(ER_WARN_USING_OTHER_HANDLER),
ha_resolve_storage_engine_name(*new_engine),
table_name);
}
return FALSE;
}
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