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mariadb/sql/sql_table.cc
unknown 2c5d427c87 Fix for bugs #5859 "DROP TABLE does not drop triggers" and 
#6559 "DROP DATABASE forgets to drop triggers".

If we drop table we should also drop all triggers associated with it.
To do this we have to check for existence of .TRG file when we are 
dropping table and delete it too.


mysql-test/r/trigger.result:
  Added tests for bugs #5859 "DROP TABLE does not drop triggers"
  and #6559 "DROP DATABASE forgets to drop triggers".
mysql-test/t/trigger.test:
  Added tests for bugs #5859 "DROP TABLE does not drop triggers"
  and #6559 "DROP DATABASE forgets to drop triggers".
sql/handler.cc:
  Added .TRG to the list of known extensions of files associated with 
  tables.
sql/mysql_priv.h:
  Added declaration of constant holding extension for trigger files.
sql/sql_table.cc:
  mysql_rm_table_part2():
    If we drop table we should also drop all triggers associated with it.
    To do this we have to check for existence of .TRG file and delete it
    (until the moment when we will store trigger definitions in the same
     .FRM file as table description).
sql/sql_trigger.cc:
  Made constant holding extension for trigger files externally visible.
2005-03-27 16:15:21 +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"
#ifdef HAVE_BERKELEY_DB
#include "ha_berkeley.h"
#endif
#include <hash.h>
#include <myisam.h>
#include <my_dir.h>
#ifdef __WIN__
#include <io.h>
#endif
const char *primary_key_name="PRIMARY";
static bool check_if_keyname_exists(const char *name,KEY *start, KEY *end);
static char *make_unique_key_name(const char *field_name,KEY *start,KEY *end);
static int copy_data_between_tables(TABLE *from,TABLE *to,
List<create_field> &create,
enum enum_duplicates handle_duplicates,
bool ignore,
uint order_num, ORDER *order,
ha_rows *copied,ha_rows *deleted);
/*
delete (drop) tables.
SYNOPSIS
mysql_rm_table()
thd Thread handle
tables List of tables to delete
if_exists If 1, don't give error if one table doesn't exists
NOTES
Will delete all tables that can be deleted and give a compact error
messages for tables that could not be deleted.
If a table is in use, we will wait for all users to free the table
before dropping it
Wait if global_read_lock (FLUSH TABLES WITH READ LOCK) is set.
RETURN
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 */
thd->mysys_var->current_mutex= &LOCK_open;
thd->mysys_var->current_cond= &COND_refresh;
VOID(pthread_mutex_lock(&LOCK_open));
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);
goto err;
}
else
need_start_waiters= TRUE;
}
error= mysql_rm_table_part2(thd, tables, if_exists, drop_temporary, 0, 0);
err:
pthread_mutex_unlock(&LOCK_open);
pthread_mutex_lock(&thd->mysys_var->mutex);
thd->mysys_var->current_mutex= 0;
thd->mysys_var->current_cond= 0;
pthread_mutex_unlock(&thd->mysys_var->mutex);
if (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;
String wrong_tables;
int error;
bool some_tables_deleted=0, tmp_table_deleted=0, foreign_key_error=0;
DBUG_ENTER("mysql_rm_table_part2");
if (lock_table_names(thd, tables))
DBUG_RETURN(1);
/* 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;
mysql_ha_flush(thd, table, MYSQL_HA_CLOSE_FINAL);
if (!close_temporary_table(thd, db, table->table_name))
{
tmp_table_deleted=1;
continue; // removed temporary table
}
error=0;
if (!drop_temporary)
{
abort_locked_tables(thd,db,table->table_name);
while (remove_table_from_cache(thd, db, table->table_name, 0) &&
!thd->killed)
{
dropping_tables++;
(void) pthread_cond_wait(&COND_refresh,&LOCK_open);
dropping_tables--;
}
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 form file and isam files */
strxmov(path, mysql_data_home, "/", db, "/", alias, reg_ext, NullS);
(void) unpack_filename(path,path);
}
if (drop_temporary ||
(access(path,F_OK) &&
ha_create_table_from_engine(thd,db,alias,TRUE)) ||
(!drop_view && mysql_frm_type(path) != FRMTYPE_TABLE))
{
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;
db_type table_type= get_table_type(path);
*(end=fn_ext(path))=0; // Remove extension for delete
error= ha_delete_table(thd, table_type, path, table->table_name,
!dont_log_query);
if ((error == ENOENT || error == HA_ERR_NO_SUCH_TABLE) && if_exists)
error= 0;
if (error == HA_ERR_ROW_IS_REFERENCED)
{
/* the table is referenced by a foreign key constraint */
foreign_key_error=1;
}
if (!error || error == ENOENT || 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;
/*
Destroy triggers for this table if there are any.
We won't need this as soon as we will have new .FRM format,
in which we will store trigger definitions in the same .FRM
files as table descriptions.
*/
strmov(end, triggers_file_ext);
if (!access(path, F_OK))
new_error= my_delete(path, MYF(MY_WME));
}
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_error(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 && mysql_bin_log.is_open())
{
if (!error)
thd->clear_error();
Query_log_event qinfo(thd, thd->query, thd->query_length, FALSE, FALSE);
mysql_bin_log.write(&qinfo);
}
}
unlock_table_names(thd, tables, (TABLE_LIST*) 0);
thd->no_warnings_for_error= 0;
DBUG_RETURN(error);
}
int quick_rm_table(enum db_type base,const char *db,
const char *table_name)
{
char path[FN_REFLEN];
int error=0;
my_snprintf(path, sizeof(path), "%s/%s/%s%s",
mysql_data_home, db, table_name, reg_ext);
unpack_filename(path,path);
if (my_delete(path,MYF(0)))
error=1; /* purecov: inspected */
my_snprintf(path, sizeof(path), "%s/%s/%s", mysql_data_home, db, table_name);
unpack_filename(path,path);
return ha_delete_table(current_thd, base, path, 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:
if (!(table_flags & HA_CAN_BIT_FIELD))
{
my_error(ER_CHECK_NOT_IMPLEMENTED, MYF(0), "BIT FIELD");
DBUG_RETURN(1);
}
sql_field->pack_flag= FIELDFLAG_NUMBER;
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
*/
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;
uint max_key_length= file->max_key_length();
ulong pos;
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;
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), "_bin", 4);
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)
{
interval= sql_field->interval= typelib(sql_field->interval_list);
List_iterator<String> it(sql_field->interval_list);
String conv, *tmp;
for (uint i= 0; (tmp= it++); i++)
{
if (String::needs_conversion(tmp->length(), tmp->charset(),
cs, &dummy))
{
uint cnv_errs;
conv.copy(tmp->ptr(), tmp->length(), tmp->charset(), cs, &cnv_errs);
char *buf= (char*) sql_alloc(conv.length()+1);
memcpy(buf, conv.ptr(), conv.length());
buf[conv.length()]= '\0';
interval->type_names[i]= buf;
interval->type_lengths[i]= conv.length();
}
// Strip trailing spaces.
uint 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)
{
sql_field->def=
sql_field->def->safe_charset_converter(cs);
}
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);
}
sql_field->create_length_to_internal_length();
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)
{
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,
"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; // Probably from an item
}
if (!(sql_field->flags & NOT_NULL_FLAG))
null_fields++;
if (sql_field->sql_type == FIELD_TYPE_BIT)
total_uneven_bit_length+= sql_field->length & 7;
if (check_column_name(sql_field->field_name))
{
my_error(ER_WRONG_COLUMN_NAME, MYF(0), sql_field->field_name);
DBUG_RETURN(-1);
}
/* Check if we have used the same field name before */
for (dup_no=0; (dup_field=it2++) != sql_field; dup_no++)
{
if (my_strcasecmp(system_charset_info,
sql_field->field_name,
dup_field->field_name) == 0)
{
/*
If this was a CREATE ... SELECT statement, accept a field
redefinition if we are changing a field in the SELECT part
*/
if (field_no < select_field_pos || dup_no >= select_field_pos)
{
my_error(ER_DUP_FIELDNAME, MYF(0), sql_field->field_name);
DBUG_RETURN(-1);
}
else
{
/* Field redefined */
sql_field->sql_type= dup_field->sql_type;
sql_field->charset= (dup_field->charset ?
dup_field->charset :
create_info->default_table_charset);
sql_field->length= dup_field->length;
sql_field->pack_length= dup_field->pack_length;
sql_field->key_length= dup_field->key_length;
sql_field->create_length_to_internal_length();
sql_field->decimals= dup_field->decimals;
sql_field->flags= dup_field->flags;
sql_field->unireg_check= dup_field->unireg_check;
it2.remove(); // Remove first (create) definition
select_field_pos--;
break;
}
}
}
/* 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();
}
/* If fixed row records, we need one bit to check for deleted rows */
if (!(db_options & HA_OPTION_PACK_RECORD))
null_fields++;
pos= (null_fields + total_uneven_bit_length + 7) / 8;
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= pos;
if (MTYP_TYPENR(sql_field->unireg_check) == Field::NEXT_NUMBER)
auto_increment++;
pos+=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;
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))
{
if (!(file->table_flags() & HA_CAN_INDEX_BLOBS))
{
my_error(ER_BLOB_USED_AS_KEY, MYF(0), column->field_name);
DBUG_RETURN(-1);
}
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;
}
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) > file->max_key_length() ||
length > file->max_key_part_length())
{
length=min(file->max_key_length(), file->max_key_part_length());
if (key->type == Key::MULTIPLE)
{
/* not a critical problem */
char warn_buff[MYSQL_ERRMSG_SIZE];
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);
DBUG_RETURN(0);
}
/*
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];
const char *alias;
uint db_options, key_count;
KEY *key_info_buffer;
handler *file;
bool error= TRUE;
enum db_type new_db_type;
DBUG_ENTER("mysql_create_table");
/* Check for duplicate fields and check type of table to create */
if (!fields.elements)
{
my_message(ER_TABLE_MUST_HAVE_COLUMNS, ER(ER_TABLE_MUST_HAVE_COLUMNS),
MYF(0));
DBUG_RETURN(TRUE);
}
if ((new_db_type= ha_checktype(create_info->db_type)) !=
create_info->db_type)
{
create_info->db_type= new_db_type;
push_warning_printf(thd, MYSQL_ERROR::WARN_LEVEL_WARN,
ER_WARN_USING_OTHER_HANDLER,
ER(ER_WARN_USING_OTHER_HANDLER),
ha_get_storage_engine(new_db_type),
table_name);
}
db_options=create_info->table_options;
if (create_info->row_type == ROW_TYPE_DYNAMIC)
db_options|=HA_OPTION_PACK_RECORD;
alias= table_case_name(create_info, table_name);
file=get_new_handler((TABLE*) 0, create_info->db_type);
#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);
DBUG_RETURN(TRUE);
}
#endif
/*
If the table character set was not given explicitely,
let's fetch the database default character set and
apply it to the table.
*/
if (!create_info->default_table_charset)
{
HA_CREATE_INFO db_info;
uint length;
char path[FN_REFLEN];
strxmov(path, mysql_data_home, "/", db, NullS);
length= unpack_dirname(path,path); // Convert if not unix
strmov(path+length, MY_DB_OPT_FILE);
load_db_opt(thd, path, &db_info);
create_info->default_table_charset= db_info.default_table_charset;
}
if (mysql_prepare_table(thd, create_info, fields,
keys, internal_tmp_table, db_options, file,
key_info_buffer, &key_count,
select_field_count))
DBUG_RETURN(TRUE);
/* Check if table exists */
if (create_info->options & HA_LEX_CREATE_TMP_TABLE)
{
my_snprintf(path, sizeof(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, path);
create_info->table_options|=HA_CREATE_DELAY_KEY_WRITE;
}
else
my_snprintf(path, sizeof(path), "%s/%s/%s%s", mysql_data_home, db,
alias, reg_ext);
unpack_filename(path,path);
/* Check if table already exists */
if ((create_info->options & HA_LEX_CREATE_TMP_TABLE)
&& find_temporary_table(thd,db,table_name))
{
if (create_info->options & HA_LEX_CREATE_IF_NOT_EXISTS)
{
create_info->table_existed= 1; // Mark that table existed
DBUG_RETURN(FALSE);
}
my_error(ER_TABLE_EXISTS_ERROR, MYF(0), alias);
DBUG_RETURN(TRUE);
}
if (wait_if_global_read_lock(thd, 0, 1))
DBUG_RETURN(error);
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)
{
create_info->table_existed= 1; // Mark that table existed
error= FALSE;
}
else
my_error(ER_TABLE_EXISTS_ERROR, MYF(0), table_name);
goto end;
}
}
/*
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_create_table_from_engine(thd, db, table_name,
create_if_not_exists))
{
DBUG_PRINT("info", ("Table already existed in handler"));
if (create_if_not_exists)
{
create_info->table_existed= 1; // Mark that table existed
error= FALSE;
}
else
my_error(ER_TABLE_EXISTS_ERROR, MYF(0), table_name);
goto end;
}
}
thd->proc_info="creating table";
create_info->table_existed= 0; // Mark that table is created
if (thd->variables.sql_mode & MODE_NO_DIR_IN_CREATE)
create_info->data_file_name= create_info->index_file_name= 0;
create_info->table_options=db_options;
if (rea_create_table(thd, path, create_info, fields, key_count,
key_info_buffer))
{
/* my_error(ER_CANT_CREATE_TABLE,MYF(0),table_name,my_errno); */
goto end;
}
if (create_info->options & HA_LEX_CREATE_TMP_TABLE)
{
/* Open table and put in temporary table list */
if (!(open_temporary_table(thd, path, db, table_name, 1)))
{
(void) rm_temporary_table(create_info->db_type, path);
goto end;
}
thd->tmp_table_used= 1;
}
if (!internal_tmp_table && mysql_bin_log.is_open())
{
thd->clear_error();
Query_log_event qinfo(thd, thd->query, thd->query_length, FALSE, FALSE);
mysql_bin_log.write(&qinfo);
}
error= FALSE;
end:
VOID(pthread_mutex_unlock(&LOCK_open));
start_waiting_global_read_lock(thd);
thd->proc_info="After create";
DBUG_RETURN(error);
}
/*
** Give the key name after the first field with an optional '_#' after
**/
static bool
check_if_keyname_exists(const char *name, KEY *start, KEY *end)
{
for (KEY *key=start ; key != end ; key++)
if (!my_strcasecmp(system_charset_info,name,key->name))
return 1;
return 0;
}
static char *
make_unique_key_name(const char *field_name,KEY *start,KEY *end)
{
char buff[MAX_FIELD_NAME],*buff_end;
if (!check_if_keyname_exists(field_name,start,end) &&
my_strcasecmp(system_charset_info,field_name,primary_key_name))
return (char*) field_name; // Use fieldname
buff_end=strmake(buff,field_name, 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 *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;
DBUG_ENTER("create_table_from_items");
tmp_table.alias= 0;
tmp_table.s= &tmp_table.share_not_to_be_used;
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 == DB_TYPE_MYISAM ||
create_info->db_type == DB_TYPE_HEAP);
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);
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)))
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);
}
table->reginfo.lock_type=TL_WRITE;
if (!((*lock)= mysql_lock_tables(thd, &table,1)))
{
VOID(pthread_mutex_lock(&LOCK_open));
hash_delete(&open_cache,(byte*) table);
VOID(pthread_mutex_unlock(&LOCK_open));
quick_rm_table(create_info->db_type, 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(enum db_type base,
const char *old_db,
const char *old_name,
const char *new_db,
const char *new_name)
{
char from[FN_REFLEN], to[FN_REFLEN];
char tmp_from[NAME_LEN+1], tmp_to[NAME_LEN+1];
handler *file=(base == DB_TYPE_UNKNOWN ? 0 : get_new_handler((TABLE*) 0, base));
int error=0;
DBUG_ENTER("mysql_rename_table");
if (lower_case_table_names == 2 && file &&
!(file->table_flags() & HA_FILE_BASED))
{
/* Table handler expects to get all file names as lower case */
strmov(tmp_from, old_name);
my_casedn_str(files_charset_info, tmp_from);
old_name= tmp_from;
strmov(tmp_to, new_name);
my_casedn_str(files_charset_info, tmp_to);
new_name= tmp_to;
}
my_snprintf(from, sizeof(from), "%s/%s/%s",
mysql_data_home, old_db, old_name);
my_snprintf(to, sizeof(to), "%s/%s/%s",
mysql_data_home, new_db, new_name);
fn_format(from,from,"","",4);
fn_format(to,to, "","",4);
if (!file ||
!(error=file->rename_table((const char*) from,(const char *) to)))
{
if (rename_file_ext(from,to,reg_ext))
{
error=my_errno;
/* Restore old file name */
if (file)
file->rename_table((const char*) to,(const char *) from);
}
}
delete file;
if (error)
my_error(ER_ERROR_ON_RENAME, MYF(0), from, to, error);
DBUG_RETURN(error != 0);
}
/*
Force all other threads to stop using the table
SYNOPSIS
wait_while_table_is_used()
thd Thread handler
table Table to remove from cache
function HA_EXTRA_PREPARE_FOR_DELETE if table is to be deleted
HA_EXTRA_FORCE_REOPEN if table is not be used
NOTES
When returning, the table will be unusable for other threads until
the table is closed.
PREREQUISITES
Lock on LOCK_open
Win32 clients must also have a WRITE LOCK on the table !
*/
static void wait_while_table_is_used(THD *thd,TABLE *table,
enum ha_extra_function function)
{
DBUG_PRINT("enter",("table: %s", table->s->table_name));
DBUG_ENTER("wait_while_table_is_used");
safe_mutex_assert_owner(&LOCK_open);
VOID(table->file->extra(function));
/* Mark all tables that are in use as 'old' */
mysql_lock_abort(thd, table); // end threads waiting on lock
/* Wait until all there are no other threads that has this table open */
while (remove_table_from_cache(thd, table->s->db, table->s->table_name, 0))
{
dropping_tables++;
(void) pthread_cond_wait(&COND_refresh,&LOCK_open);
dropping_tables--;
}
DBUG_VOID_RETURN;
}
/*
Close a cached table
SYNOPSIS
close_cached_table()
thd Thread handler
table Table to remove from cache
NOTES
Function ends by signaling threads waiting for the table to try to
reopen the table.
PREREQUISITES
Lock on LOCK_open
Win32 clients must also have a WRITE LOCK on the table !
*/
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("error", 5, 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];
char* table_name = table->table_name;
char* db = thd->db ? thd->db : table->db;
if (fn_format_relative_to_data_home(src_path, table_name, backup_dir,
reg_ext))
DBUG_RETURN(-1); // protect buffer overflow
my_snprintf(dst_path, sizeof(dst_path), "%s%s/%s",
mysql_real_data_home, db, table_name);
if (lock_and_wait_for_table_name(thd,table))
DBUG_RETURN(-1);
if (my_copy(src_path,
fn_format(dst_path, dst_path,"", reg_ext, 4),
MYF(MY_WME)))
{
pthread_mutex_lock(&LOCK_open);
unlock_table_name(thd, table);
pthread_mutex_unlock(&LOCK_open);
DBUG_RETURN(send_check_errmsg(thd, table, "restore",
"Failed copying .frm file"));
}
if (mysql_truncate(thd, table, 1))
{
pthread_mutex_lock(&LOCK_open);
unlock_table_name(thd, table);
pthread_mutex_unlock(&LOCK_open);
DBUG_RETURN(send_check_errmsg(thd, table, "restore",
"Failed generating table from .frm file"));
}
}
/*
Now we should be able to open the partially restored table
to finish the restore in the handler later on
*/
if (!(table->table = reopen_name_locked_table(thd, table)))
{
pthread_mutex_lock(&LOCK_open);
unlock_table_name(thd, table);
pthread_mutex_unlock(&LOCK_open);
}
DBUG_RETURN(0);
}
static int prepare_for_repair(THD* thd, TABLE_LIST *table_list,
HA_CHECK_OPT *check_opt)
{
int error= 0;
TABLE tmp_table, *table;
DBUG_ENTER("prepare_for_repair");
if (!(check_opt->sql_flags & TT_USEFRM))
DBUG_RETURN(0);
if (!(table= table_list->table)) /* if open_ltable failed */
{
char name[FN_REFLEN];
strxmov(name, mysql_data_home, "/", table_list->db, "/",
table_list->table_name, NullS);
if (openfrm(thd, name, "", 0, 0, 0, &tmp_table))
DBUG_RETURN(0); // Can't open frm file
table= &tmp_table;
}
/*
User gave us USE_FRM which means that the header in the index file is
trashed.
In this case we will try to fix the table the following way:
- Rename the data file to a temporary name
- Truncate the table
- Replace the new data file with the old one
- Run a normal repair using the new index file and the old data file
*/
char from[FN_REFLEN],tmp[FN_REFLEN+32];
const char **ext= table->file->bas_ext();
MY_STAT stat_info;
/*
Check if this is a table type that stores index and data separately,
like ISAM or MyISAM
*/
if (!ext[0] || !ext[1])
goto end; // No data file
strxmov(from, table->s->path, ext[1], NullS); // Name of data file
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.
*/
if (!(table_list->table = reopen_name_locked_table(thd, table_list)))
{
pthread_mutex_lock(&LOCK_open);
unlock_table_name(thd, table_list);
pthread_mutex_unlock(&LOCK_open);
}
end:
if (table == &tmp_table)
closefrm(table); // Free allocated memory
DBUG_RETURN(error);
}
/*
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, *next_global_table;
List<Item> field_list;
Item *item;
Protocol *protocol= thd->protocol;
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);
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 */
next_global_table= table->next_global;
table->next_global= 0;
thd->no_warnings_for_error= no_warnings_for_error;
open_and_lock_tables(thd, table);
thd->no_warnings_for_error= 0;
table->next_global= next_global_table;
/* if view are unsupported */
if (table->view && view_operator_func == NULL)
{
result_code= HA_ADMIN_NOT_IMPLEMENTED;
goto send_result;
}
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("error",5, 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);
thd->clear_error();
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];
protocol->prepare_for_resend();
protocol->store(table_name, system_charset_info);
protocol->store(operator_name, system_charset_info);
protocol->store("error", 5, system_charset_info);
my_snprintf(buff, sizeof(buff), ER(ER_OPEN_AS_READONLY), table_name);
protocol->store(buff, system_charset_info);
close_thread_tables(thd);
table->table=0; // For query cache
if (protocol->write())
goto err;
continue;
}
/* Close all instances of the table to allow repair to rename files */
if (lock_type == TL_WRITE && table->table->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);
while (remove_table_from_cache(thd, table->table->s->db,
table->table->s->table_name, 0) &&
! thd->killed)
{
dropping_tables++;
(void) pthread_cond_wait(&COND_refresh,&LOCK_open);
dropping_tables--;
}
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;
}
result_code = (table->table->file->*operator_func)(thd, check_opt);
send_result:
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("note", 4, system_charset_info);
protocol->store(buf, length, system_charset_info);
}
break;
case HA_ADMIN_OK:
protocol->store("status", 6, system_charset_info);
protocol->store("OK",2, system_charset_info);
break;
case HA_ADMIN_FAILED:
protocol->store("status", 6, system_charset_info);
protocol->store("Operation failed",16, system_charset_info);
break;
case HA_ADMIN_REJECT:
protocol->store("status", 6, system_charset_info);
protocol->store("Operation need committed state",30, system_charset_info);
open_for_modify= FALSE;
break;
case HA_ADMIN_ALREADY_DONE:
protocol->store("status", 6, system_charset_info);
protocol->store("Table is already up to date", 27, system_charset_info);
break;
case HA_ADMIN_CORRUPT:
protocol->store("error", 5, system_charset_info);
protocol->store("Corrupt", 7, system_charset_info);
fatal_error=1;
break;
case HA_ADMIN_INVALID:
protocol->store("error", 5, system_charset_info);
protocol->store("Invalid argument",16, system_charset_info);
break;
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;
result_code= mysql_recreate_table(thd, table, 0);
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
}
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("note", 4, system_charset_info);
protocol->store(ER(ER_VIEW_CHECKSUM), strlen(ER(ER_VIEW_CHECKSUM)),
system_charset_info);
break;
}
default: // Probably HA_ADMIN_INTERNAL_ERROR
protocol->store("error", 5, system_charset_info);
protocol->store("Unknown - internal error during operation", 41
, system_charset_info);
fatal_error=1;
break;
}
if (fatal_error)
table->table->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,
table->table->s->table_name, 0);
pthread_mutex_unlock(&LOCK_open);
/* May be something modified consequently we have to invalidate cache */
query_cache_invalidate3(thd, table->table, 0);
}
close_thread_tables(thd);
table->table=0; // For query cache
if (protocol->write())
goto err;
}
send_eof(thd);
DBUG_RETURN(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];
char *db= table->db;
char *table_name= table->table_name;
char *src_db= thd->db;
char *src_table= table_ident->table.str;
int err;
bool res= TRUE;
TABLE_LIST src_tables_list;
DBUG_ENTER("mysql_create_like_table");
/*
Validate the source table
*/
if (table_ident->table.length > NAME_LEN ||
(table_ident->table.length &&
check_table_name(src_table,table_ident->table.length)) ||
table_ident->db.str && check_db_name((src_db= table_ident->db.str)))
{
my_error(ER_WRONG_TABLE_NAME, MYF(0), src_table);
DBUG_RETURN(TRUE);
}
bzero((gptr)&src_tables_list, sizeof(src_tables_list));
src_tables_list.db= table_ident->db.str ? table_ident->db.str : thd->db;
src_tables_list.table_name= table_ident->table.str;
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, reg_ext, NullS);
else
{
strxmov(src_path, mysql_data_home, "/", src_db, "/", src_table,
reg_ext, NullS);
/* Resolve symlinks (for windows) */
fn_format(src_path, src_path, "", "", MYF(MY_UNPACK_FILENAME));
if (access(src_path, F_OK))
{
my_error(ER_BAD_TABLE_ERROR, MYF(0), src_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;
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
{
strxmov(dst_path, mysql_data_home, "/", db, "/", table_name,
reg_ext, NullS);
fn_format(dst_path, dst_path, "", "", MYF(MY_UNPACK_FILENAME));
if (!access(dst_path, F_OK))
goto table_exists;
}
/*
Create a new table by copying from source table
*/
if (my_copy(src_path, dst_path, MYF(MY_WME|MY_DONT_OVERWRITE_FILE)))
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).
*/
*fn_ext(dst_path)= 0;
err= ha_create_table(dst_path, create_info, 1);
if (create_info->options & HA_LEX_CREATE_TMP_TABLE)
{
if (err || !open_temporary_table(thd, dst_path, db, table_name, 1))
{
(void) rm_temporary_table(create_info->db_type,
dst_path); /* purecov: inspected */
goto err; /* purecov: inspected */
}
}
else if (err)
{
(void) quick_rm_table(create_info->db_type, db,
table_name); /* purecov: inspected */
goto err; /* purecov: inspected */
}
// Must be written before unlock
if (mysql_bin_log.is_open())
{
thd->clear_error();
Query_log_event qinfo(thd, thd->query, thd->query_length, FALSE, FALSE);
mysql_bin_log.write(&qinfo);
}
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;
if (mysql_bin_log.is_open())
{
Query_log_event qinfo(thd, thd->query, thd->query_length, FALSE, FALSE);
mysql_bin_log.write(&qinfo);
}
err:
close_thread_tables(thd);
thd->tablespace_op=FALSE;
if (error == 0)
{
send_ok(thd);
DBUG_RETURN(0);
}
if (error == HA_ERR_ROW_IS_REFERENCED)
my_error(ER_ROW_IS_REFERENCED, 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=DB_TYPE_DEFAULT;
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=DB_TYPE_DEFAULT;
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)||
(my_snprintf(path, sizeof(path), "%s/%s/%s%s", mysql_data_home,
table_list->db, (lower_case_table_names == 2) ?
table_list->alias: table_list->table_name, reg_ext) >=
(int) sizeof(path)) ||
! unpack_filename(path, path) ||
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=DB_TYPE_DEFAULT;
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)||
(snprintf(path, sizeof(path), "%s/%s/%s%s", mysql_data_home,
table_list->db, (lower_case_table_names == 2)?
table_list->alias: table_list->table_name, reg_ext)>=
(int)sizeof(path))||
! unpack_filename(path, path)||
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 */
/*
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;
enum db_type old_db_type,new_db_type;
bool need_copy_table;
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);
/* 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)
{
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, FN_REFLEN, 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 == DB_TYPE_DEFAULT)
create_info->db_type= old_db_type;
if ((new_db_type= ha_checktype(create_info->db_type)) !=
create_info->db_type)
{
create_info->db_type= new_db_type;
push_warning_printf(thd, MYSQL_ERROR::WARN_LEVEL_WARN,
ER_WARN_USING_OTHER_HANDLER,
ER(ER_WARN_USING_OTHER_HANDLER),
ha_get_storage_engine(new_db_type),
new_name);
}
if (create_info->row_type == ROW_TYPE_NOT_USED)
create_info->row_type= table->s->row_type;
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;
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)
{
if (mysql_bin_log.is_open())
{
thd->clear_error();
Query_log_event qinfo(thd, thd->query, thd->query_length, FALSE, FALSE);
mysql_bin_log.write(&qinfo);
}
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 droped */
Alter_drop *drop;
drop_it.rewind();
while ((drop=drop_it++))
{
if (drop->type == Alter_drop::COLUMN &&
!my_strcasecmp(system_charset_info,field->field_name, drop->name))
{
/* Reset auto_increment value if it was dropped */
if (MTYP_TYPENR(field->unireg_check) == Field::NEXT_NUMBER &&
!(used_fields & HA_CREATE_USED_AUTO))
{
create_info->auto_increment_value=0;
create_info->used_fields|=HA_CREATE_USED_AUTO;
}
break;
}
}
if (drop)
{
drop_it.remove();
continue;
}
/* Check if field is changed */
def_it.rewind();
while ((def=def_it++))
{
if (def->change &&
!my_strcasecmp(system_charset_info,field->field_name, def->change))
break;
}
if (def)
{ // Field is changed
def->field=field;
if (!def->after)
{
create_list.push_back(def);
def_it.remove();
}
}
else
{ // Use old field value
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);
}
def->def=alter->def; // Use new default
alter_it.remove();
}
}
}
def_it.rewind();
List_iterator<create_field> find_it(create_list);
while ((def=def_it++)) // Add new columns
{
if (def->change && ! def->field)
{
my_error(ER_BAD_FIELD_ERROR, MYF(0), def->change, table_name);
DBUG_RETURN(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
{ // Check if sub key
if (cfield->field->type() != FIELD_TYPE_BLOB &&
(cfield->field->pack_length() == key_part_length ||
cfield->length <= key_part_length /
key_part->field->charset()->mbmaxlen))
key_part_length=0; // Use whole field
}
key_part_length /= key_part->field->charset()->mbmaxlen;
key_parts.push_back(new key_part_spec(cfield->field_name,
key_part_length));
}
if (key_parts.elements)
key_list.push_back(new Key(key_info->flags & HA_SPATIAL ? Key::SPATIAL :
(key_info->flags & HA_NOSAME ?
(!my_strcasecmp(system_charset_info,
key_name, primary_key_name) ?
Key::PRIMARY : Key::UNIQUE) :
(key_info->flags & HA_FULLTEXT ?
Key::FULLTEXT : Key::MULTIPLE)),
key_name,
key_info->algorithm,
test(key_info->flags & HA_GENERATED_KEY),
key_parts));
}
{
Key *key;
while ((key=key_it++)) // Add new keys
{
if (key->type != Key::FOREIGN_KEY)
key_list.push_back(key);
if (key->name &&
!my_strcasecmp(system_charset_info,key->name,primary_key_name))
{
my_error(ER_WRONG_NAME_FOR_INDEX, MYF(0), key->name);
DBUG_RETURN(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);
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;
/*
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
*/
need_copy_table=(alter_info->flags & ~(ALTER_CHANGE_COLUMN_DEFAULT|ALTER_OPTIONS) ||
create_info->used_fields & ~(HA_CREATE_USED_COMMENT|HA_CREATE_USED_PASSWORD) ||
table->s->tmp_table);
create_info->frm_only= !need_copy_table;
/*
Handling of symlinked tables:
If no rename:
Create new data file and index file on the same disk as the
old data and index files.
Copy data.
Rename new data file over old data file and new index file over
old index file.
Symlinks are not changed.
If rename:
Create new data file and index file on the same disk as the
old data and index files. Create also symlinks to point at
the new tables.
Copy data.
At end, rename temporary tables and symlinks to temporary table
to final table name.
Remove old table and old symlinks
If rename is made to another database:
Create new tables in new database.
Copy data.
Remove old table and symlinks.
*/
if (!strcmp(db, new_db)) // Ignore symlink if db changed
{
if (create_info->index_file_name)
{
/* Fix index_file_name to have 'tmp_name' as basename */
strmov(index_file, tmp_name);
create_info->index_file_name=fn_same(index_file,
create_info->index_file_name,
1);
}
if (create_info->data_file_name)
{
/* Fix data_file_name to have 'tmp_name' as basename */
strmov(data_file, tmp_name);
create_info->data_file_name=fn_same(data_file,
create_info->data_file_name,
1);
}
}
else
create_info->data_file_name=create_info->index_file_name=0;
/* 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;
new_table= open_table(thd, &tbl, thd->mem_root, 0);
}
else
{
char path[FN_REFLEN];
my_snprintf(path, sizeof(path), "%s/%s/%s", mysql_data_home,
new_db, tmp_name);
fn_format(path,path,"","",4);
new_table=open_temporary_table(thd, path, new_db, tmp_name,0);
}
if (!new_table)
{
VOID(quick_rm_table(new_db_type,new_db,tmp_name));
goto err;
}
}
/* 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->s->is_view)
{
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)
{
/* We changed a temporary table */
if (error)
{
/*
The following function call will free the new_table pointer,
in close_temporary_table(), so we can safely directly jump to err
*/
close_temporary_table(thd,new_db,tmp_name);
goto err;
}
/* Close lock if this is a transactional table */
if (thd->lock)
{
mysql_unlock_tables(thd, thd->lock);
thd->lock=0;
}
/* Remove link to old table and rename the new one */
close_temporary_table(thd, table->s->db, table_name);
/* 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_db,tmp_name);
my_free((gptr) new_table,MYF(0));
goto err;
}
if (mysql_bin_log.is_open())
{
thd->clear_error();
Query_log_event qinfo(thd, thd->query, thd->query_length, FALSE, FALSE);
mysql_bin_log.write(&qinfo);
}
goto end_temporary;
}
if (new_table)
{
intern_close_table(new_table); /* close temporary table */
my_free((gptr) new_table,MYF(0));
}
VOID(pthread_mutex_lock(&LOCK_open));
if (error)
{
VOID(quick_rm_table(new_db_type,new_db,tmp_name));
VOID(pthread_mutex_unlock(&LOCK_open));
goto err;
}
/*
Data is copied. Now we rename the old table to a temp name,
rename the new one to the old name, remove all entries from the old table
from the 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
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=DB_TYPE_UNKNOWN; // 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)
close_cached_table(thd,table);
VOID(pthread_mutex_unlock(&LOCK_open));
goto err;
}
if (thd->lock || new_name != table_name) // True if WIN32
{
/*
Not table locking or alter table with rename
free locks and remove old table
*/
if (table)
close_cached_table(thd,table);
VOID(quick_rm_table(old_db_type,db,old_name));
}
else
{
/*
Using LOCK TABLES without rename.
This code is never executed on WIN32!
Remove old renamed table, reopen table and get new locks
*/
if (table)
{
VOID(table->file->extra(HA_EXTRA_FORCE_REOPEN)); // Use new file
remove_table_from_cache(thd,db,table_name, 0); // Mark in-use copies old
mysql_lock_abort(thd,table); // end threads waiting on lock
}
VOID(quick_rm_table(old_db_type,db,old_name));
if (close_data_tables(thd,db,table_name) ||
reopen_tables(thd,1,0))
{ // This shouldn't happen
if (table)
close_cached_table(thd,table); // Remove lock for table
VOID(pthread_mutex_unlock(&LOCK_open));
goto err;
}
}
/* The ALTER TABLE is always in its own transaction */
error = ha_commit_stmt(thd);
if (ha_commit(thd))
error=1;
if (error)
{
VOID(pthread_mutex_unlock(&LOCK_open));
VOID(pthread_cond_broadcast(&COND_refresh));
goto err;
}
thd->proc_info="end";
if (mysql_bin_log.is_open())
{
thd->clear_error();
Query_log_event qinfo(thd, thd->query, thd->query_length, FALSE, FALSE);
mysql_bin_log.write(&qinfo);
}
VOID(pthread_cond_broadcast(&COND_refresh));
VOID(pthread_mutex_unlock(&LOCK_open));
#ifdef HAVE_BERKELEY_DB
if (old_db_type == DB_TYPE_BERKELEY_DB)
{
/*
For the alter table to be properly flushed to the logs, we
have to open the new table. If not, we get a problem on server
shutdown.
*/
char path[FN_REFLEN];
my_snprintf(path, sizeof(path), "%s/%s/%s", mysql_data_home,
new_db, table_name);
fn_format(path,path,"","",4);
table=open_temporary_table(thd, path, new_db, tmp_name,0);
if (table)
{
intern_close_table(table);
my_free((char*) table, MYF(0));
}
else
sql_print_warning("Could not open BDB table %s.%s after rename\n",
new_db,table_name);
(void) berkeley_flush_logs();
}
#endif
table_list->table=0; // For query cache
query_cache_invalidate3(thd, table_list, 0);
end_temporary:
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);
}
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);
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= (char*) from->s->table_name;
tables.db= (char*) from->s->db;
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 */
from->file->extra(HA_EXTRA_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->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;
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=DB_TYPE_DEFAULT;
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;
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_NO_INSERT);
thd->clear_error(); // these errors shouldn't get client
protocol->prepare_for_resend();
protocol->store(table_name, system_charset_info);
if (!t)
{
/* Table didn't exist */
protocol->store_null();
thd->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;
/* InnoDB must be told explicitly to retrieve all columns, because
this function does not set field->query_id in the columns to the
current query id */
t->file->extra(HA_EXTRA_RETRIEVE_ALL_COLS);
if (t->file->ha_rnd_init(1))
protocol->store_null();
else
{
while (!t->file->rnd_next(t->record[0]))
{
ha_checksum row_crc= 0;
if (t->record[0] != (byte*) t->field[0]->ptr)
row_crc= my_checksum(row_crc, t->record[0],
((byte*) t->field[0]->ptr) - t->record[0]);
for (uint i= 0; i < t->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);
}
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