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mariadb/sql/sql_table.cc
unknown 89bb316550 One test case, one bug fix and one new feature 
mysql-test/r/innodb.result:
  A test case for non-functional rollback after inserting a row into
  MyISAM table with binary log enabled.
mysql-test/t/innodb.test:
  A test case for non-functional rollback after inserting a row into
  MyISAM table with binary log enabled.
sql/sql_show.cc:
  Displaying disabled keys in SHOW KEYS
sql/sql_table.cc:
  Fix for a serious bug with ALTER TABLE ENABLE / DISABLE KEYS
2003-04-03 20:24:15 +03:00

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/* Copyright (C) 2000-2003 MySQL AB
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */
/* drop and alter of tables */
#include "mysql_priv.h"
#ifdef HAVE_BERKELEY_DB
#include "ha_berkeley.h"
#endif
#include <hash.h>
#include <myisam.h>
#include <assert.h>
#ifdef __WIN__
#include <io.h>
#endif
extern HASH open_cache;
static 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,
ORDER *order,
ha_rows *copied,ha_rows *deleted);
/*
delete (drop) tables.
SYNOPSIS
mysql_rm_table()
thd Thread handle
tables List of tables to delete
if_exists If 1, don't give error if one table doesn't exists
NOTES
Will delete all tables that can be deleted and give a compact error
messages for tables that could not be deleted.
If a table is in use, we will wait for all users to free the table
before dropping it
Wait if global_read_lock (FLUSH TABLES WITH READ LOCK) is set.
RETURN
0 ok. In this case ok packet is sent to user
-1 Error (Error message given but not sent to user)
*/
int mysql_rm_table(THD *thd,TABLE_LIST *tables, my_bool if_exists)
{
int error= 0;
DBUG_ENTER("mysql_rm_table");
/* mark for close and remove all cached entries */
thd->mysys_var->current_mutex= &LOCK_open;
thd->mysys_var->current_cond= &COND_refresh;
VOID(pthread_mutex_lock(&LOCK_open));
if (global_read_lock)
{
if (thd->global_read_lock)
{
my_error(ER_TABLE_NOT_LOCKED_FOR_WRITE,MYF(0),
tables->real_name);
error= 1;
goto err;
}
while (global_read_lock && ! thd->killed)
{
(void) pthread_cond_wait(&COND_refresh,&LOCK_open);
}
}
error=mysql_rm_table_part2(thd,tables,if_exists,0);
err:
pthread_mutex_unlock(&LOCK_open);
pthread_mutex_lock(&thd->mysys_var->mutex);
thd->mysys_var->current_mutex= 0;
thd->mysys_var->current_cond= 0;
pthread_mutex_unlock(&thd->mysys_var->mutex);
if (error)
DBUG_RETURN(-1);
send_ok(&thd->net);
DBUG_RETURN(0);
}
/*
delete (drop) tables.
SYNOPSIS
mysql_rm_table_part2_with_lock()
thd Thread handle
tables List of tables to delete
if_exists If 1, don't give error if one table doesn't exists
dont_log_query Don't write query to log files
NOTES
Works like documented in mysql_rm_table(), but don't check
global_read_lock and don't send_ok packet to server.
RETURN
0 ok
1 error
*/
int mysql_rm_table_part2_with_lock(THD *thd,
TABLE_LIST *tables, bool if_exists,
bool 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, 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;
}
/*
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.
*/
int mysql_rm_table_part2(THD *thd, TABLE_LIST *tables, bool if_exists,
bool dont_log_query)
{
TABLE_LIST *table;
char path[FN_REFLEN];
String wrong_tables;
db_type table_type;
int error;
bool some_tables_deleted=0, tmp_table_deleted=0;
DBUG_ENTER("mysql_rm_table_part2");
if (lock_table_names(thd, tables))
DBUG_RETURN(1);
for (table=tables ; table ; table=table->next)
{
char *db=table->db;
mysql_ha_closeall(thd, table);
if (!close_temporary_table(thd, db, table->real_name))
{
tmp_table_deleted=1;
continue; // removed temporary table
}
abort_locked_tables(thd,db,table->real_name);
while (remove_table_from_cache(thd,db,table->real_name) && !thd->killed)
{
dropping_tables++;
(void) pthread_cond_wait(&COND_refresh,&LOCK_open);
dropping_tables--;
}
drop_locked_tables(thd,db,table->real_name);
if (thd->killed)
DBUG_RETURN(-1);
/* remove form file and isam files */
strxmov(path, mysql_data_home, "/", db, "/", table->real_name, reg_ext,
NullS);
(void) unpack_filename(path,path);
error=0;
table_type=get_table_type(path);
if (access(path,F_OK))
{
if (!if_exists)
error=1;
}
else
{
char *end;
*(end=fn_ext(path))=0; // Remove extension
error=ha_delete_table(table_type, path);
if (error == ENOENT && if_exists)
error = 0;
if (!error || error == ENOENT)
{
/* Delete the table definition file */
strmov(end,reg_ext);
if (!(error=my_delete(path,MYF(MY_WME))))
some_tables_deleted=1;
}
}
if (error)
{
if (wrong_tables.length())
wrong_tables.append(',');
wrong_tables.append(String(table->real_name));
}
}
if (some_tables_deleted || tmp_table_deleted)
{
query_cache_invalidate3(thd, tables, 0);
if (!dont_log_query)
{
mysql_update_log.write(thd, thd->query,thd->query_length);
if (mysql_bin_log.is_open())
{
Query_log_event qinfo(thd, thd->query, thd->query_length,
tmp_table_deleted && !some_tables_deleted);
mysql_bin_log.write(&qinfo);
}
}
}
unlock_table_names(thd, tables);
error= 0;
if (wrong_tables.length())
{
my_error(ER_BAD_TABLE_ERROR,MYF(0),wrong_tables.c_ptr());
error= 1;
}
DBUG_RETURN(error);
}
int quick_rm_table(enum db_type base,const char *db,
const char *table_name)
{
char path[FN_REFLEN];
int error=0;
(void) sprintf(path,"%s/%s/%s%s",mysql_data_home,db,table_name,reg_ext);
unpack_filename(path,path);
if (my_delete(path,MYF(0)))
error=1; /* purecov: inspected */
sprintf(path,"%s/%s/%s",mysql_data_home,db,table_name);
unpack_filename(path,path);
return ha_delete_table(base,path) || error;
}
/*
Sort keys in the following order:
- PRIMARY KEY
- UNIQUE keyws where all column are NOT NULL
- Other UNIQUE keys
- Normal keys
- Fulltext keys
This will make checking for duplicated keys faster and ensure that
PRIMARY keys are prioritized.
*/
static int sort_keys(KEY *a, KEY *b)
{
if (a->flags & HA_NOSAME)
{
if (!(b->flags & HA_NOSAME))
return -1;
if ((a->flags ^ b->flags) & HA_NULL_PART_KEY)
{
/* Sort NOT NULL keys before other keys */
return (a->flags & HA_NULL_PART_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);
}
/*
Create a table
SYNOPSIS
mysql_create_table()
thd Thread object
db Database
table_name Table name
create_info Create information (like MAX_ROWS)
fields List of fields to create
keys List of keys to create
tmp_table Set to 1 if this is an internal temporary table
(From ALTER TABLE)
no_log Don't log the query to binary log.
DESCRIPTION
If one creates a temporary table, this is automaticly opened
no_log is needed for the case of CREATE ... SELECT,
as the logging will be done later in sql_insert.cc
select_field_count is also used for CREATE ... SELECT,
and must be zero for standard create of table.
RETURN VALUES
0 ok
-1 error
*/
int mysql_create_table(THD *thd,const char *db, const char *table_name,
HA_CREATE_INFO *create_info,
List<create_field> &fields,
List<Key> &keys,bool tmp_table,bool no_log)
{
char path[FN_REFLEN];
const char *key_name;
create_field *sql_field,*dup_field;
int error= -1;
uint db_options,field,null_fields,blob_columns;
ulong pos;
KEY *key_info,*key_info_buffer;
KEY_PART_INFO *key_part_info;
int auto_increment=0;
handler *file;
DBUG_ENTER("mysql_create_table");
/*
** Check for duplicate fields and check type of table to create
*/
if (!fields.elements)
{
my_error(ER_TABLE_MUST_HAVE_COLUMNS,MYF(0));
DBUG_RETURN(-1);
}
List_iterator<create_field> it(fields),it2(fields);
null_fields=blob_columns=0;
db_options=create_info->table_options;
if (create_info->row_type == ROW_TYPE_DYNAMIC)
db_options|=HA_OPTION_PACK_RECORD;
file=get_new_handler((TABLE*) 0, create_info->db_type);
if ((create_info->options & HA_LEX_CREATE_TMP_TABLE) &&
(file->table_flags() & HA_NO_TEMP_TABLES))
{
my_error(ER_ILLEGAL_HA,MYF(0),table_name);
DBUG_RETURN(-1);
}
/* Don't pack keys in old tables if the user has requested this */
while ((sql_field=it++))
{
if ((sql_field->flags & BLOB_FLAG) ||
sql_field->sql_type == FIELD_TYPE_VAR_STRING &&
create_info->row_type != ROW_TYPE_FIXED)
{
db_options|=HA_OPTION_PACK_RECORD;
}
if (!(sql_field->flags & NOT_NULL_FLAG))
null_fields++;
if (check_column_name(sql_field->field_name))
{
my_error(ER_WRONG_COLUMN_NAME, MYF(0), sql_field->field_name);
DBUG_RETURN(-1);
}
while ((dup_field=it2++) != sql_field)
{
if (my_strcasecmp(sql_field->field_name, dup_field->field_name) == 0)
{
my_error(ER_DUP_FIELDNAME,MYF(0),sql_field->field_name);
DBUG_RETURN(-1);
}
}
it2.rewind();
}
/* If fixed row records, we need one bit to check for deleted rows */
if (!(db_options & HA_OPTION_PACK_RECORD))
null_fields++;
pos=(null_fields+7)/8;
it.rewind();
while ((sql_field=it++))
{
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->flags & BINARY_FLAG)
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_VAR_STRING:
case FIELD_TYPE_STRING:
sql_field->pack_flag=0;
if (sql_field->flags & BINARY_FLAG)
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;
sql_field->unireg_check=Field::INTERVAL_FIELD;
break;
case FIELD_TYPE_SET:
sql_field->pack_flag=pack_length_to_packflag(sql_field->pack_length) |
FIELDFLAG_BITFIELD;
sql_field->unireg_check=Field::BIT_FIELD;
break;
case FIELD_TYPE_DATE: // Rest of string types
case FIELD_TYPE_NEWDATE:
case FIELD_TYPE_TIME:
case FIELD_TYPE_DATETIME:
case FIELD_TYPE_NULL:
sql_field->pack_flag=f_settype((uint) sql_field->sql_type);
break;
case FIELD_TYPE_TIMESTAMP:
sql_field->unireg_check=Field::TIMESTAMP_FIELD;
/* fall through */
default:
sql_field->pack_flag=(FIELDFLAG_NUMBER |
(sql_field->flags & UNSIGNED_FLAG ? 0 :
FIELDFLAG_DECIMAL) |
(sql_field->flags & ZEROFILL_FLAG ?
FIELDFLAG_ZEROFILL : 0) |
f_settype((uint) sql_field->sql_type) |
(sql_field->decimals << FIELDFLAG_DEC_SHIFT));
break;
}
if (!(sql_field->flags & NOT_NULL_FLAG))
sql_field->pack_flag|=FIELDFLAG_MAYBE_NULL;
sql_field->offset= pos;
if (MTYP_TYPENR(sql_field->unireg_check) == Field::NEXT_NUMBER)
auto_increment++;
pos+=sql_field->pack_length;
}
if (auto_increment > 1)
{
my_error(ER_WRONG_AUTO_KEY,MYF(0));
DBUG_RETURN(-1);
}
if (auto_increment &&
(file->table_flags() & HA_NO_AUTO_INCREMENT))
{
my_error(ER_TABLE_CANT_HANDLE_AUTO_INCREMENT,MYF(0));
DBUG_RETURN(-1);
}
if (blob_columns && (file->table_flags() & HA_NO_BLOBS))
{
my_error(ER_TABLE_CANT_HANDLE_BLOB,MYF(0));
DBUG_RETURN(-1);
}
/* Create keys */
List_iterator<Key> key_iterator(keys);
uint key_parts=0,key_count=keys.elements;
List<Key> keys_in_order; // Add new keys here
bool primary_key=0,unique_key=0;
Key *key;
uint tmp, key_number;
tmp=min(file->max_keys(), MAX_KEY);
if (key_count > tmp)
{
my_error(ER_TOO_MANY_KEYS,MYF(0),tmp);
DBUG_RETURN(-1);
}
/* Calculate number of key segements */
while ((key=key_iterator++))
{
tmp=max(file->max_key_parts(),MAX_REF_PARTS);
if (key->columns.elements > tmp)
{
my_error(ER_TOO_MANY_KEY_PARTS,MYF(0),tmp);
DBUG_RETURN(-1);
}
if (key->name() && strlen(key->name()) > NAME_LEN)
{
my_error(ER_TOO_LONG_IDENT, MYF(0), key->name());
DBUG_RETURN(-1);
}
key_parts+=key->columns.elements;
}
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_info++, key_number++)
{
uint key_length=0;
key_part_spec *column;
key_info->flags= (key->type == Key::MULTIPLE) ? 0 :
(key->type == Key::FULLTEXT) ? HA_FULLTEXT : HA_NOSAME;
key_info->key_parts=(uint8) key->columns.elements;
key_info->key_part=key_part_info;
key_info->usable_key_parts= key_number;
key_info->algorithm=key->algorithm;
/* TODO: Add proper checks if handler supports key_type and algorithm */
if (key->type == Key::FULLTEXT)
{
if (!(file->table_flags() & HA_CAN_FULLTEXT))
{
my_error(ER_TABLE_CANT_HANDLE_FULLTEXT, MYF(0));
DBUG_RETURN(-1);
}
}
List_iterator<key_part_spec> cols(key->columns);
for (uint column_nr=0 ; (column=cols++) ; column_nr++)
{
it.rewind();
field=0;
while ((sql_field=it++) &&
my_strcasecmp(column->field_name,sql_field->field_name))
field++;
if (!sql_field)
{
my_printf_error(ER_KEY_COLUMN_DOES_NOT_EXITS,
ER(ER_KEY_COLUMN_DOES_NOT_EXITS),MYF(0),
column->field_name);
DBUG_RETURN(-1);
}
if (f_is_blob(sql_field->pack_flag))
{
if (!(file->table_flags() & HA_BLOB_KEY))
{
my_printf_error(ER_BLOB_USED_AS_KEY,ER(ER_BLOB_USED_AS_KEY),MYF(0),
column->field_name);
DBUG_RETURN(-1);
}
if (!column->length)
{
if (key->type == Key::FULLTEXT)
column->length=1; /* ft-code ignores it anyway :-) */
else
{
my_printf_error(ER_BLOB_KEY_WITHOUT_LENGTH,
ER(ER_BLOB_KEY_WITHOUT_LENGTH),MYF(0),
column->field_name);
DBUG_RETURN(-1);
}
}
}
if (!(sql_field->flags & NOT_NULL_FLAG))
{
if (key->type == Key::PRIMARY)
{
my_error(ER_PRIMARY_CANT_HAVE_NULL, MYF(0));
DBUG_RETURN(-1);
}
if (!(file->table_flags() & HA_NULL_KEY))
{
my_printf_error(ER_NULL_COLUMN_IN_INDEX,ER(ER_NULL_COLUMN_IN_INDEX),
MYF(0),column->field_name);
DBUG_RETURN(-1);
}
key_info->flags|= HA_NULL_PART_KEY;
}
if (MTYP_TYPENR(sql_field->unireg_check) == Field::NEXT_NUMBER)
{
if (column_nr == 0 || (file->table_flags() & HA_AUTO_PART_KEY))
auto_increment--; // Field is used
}
key_part_info->fieldnr= field;
key_part_info->offset= (uint16) sql_field->offset;
key_part_info->key_type=sql_field->pack_flag;
uint length=sql_field->pack_length;
if (column->length)
{
if (f_is_blob(sql_field->pack_flag))
{
if ((length=column->length) > file->max_key_length() ||
length > file->max_key_part_length())
{
my_error(ER_WRONG_SUB_KEY,MYF(0));
DBUG_RETURN(-1);
}
}
else if (column->length > length ||
((f_is_packed(sql_field->pack_flag) ||
((file->table_flags() & HA_NO_PREFIX_CHAR_KEYS) &&
(key_info->flags & HA_NOSAME))) &&
column->length != length))
{
my_error(ER_WRONG_SUB_KEY,MYF(0));
DBUG_RETURN(-1);
}
if (!(file->table_flags() & HA_NO_PREFIX_CHAR_KEYS))
length=column->length;
}
else if (length == 0)
{
my_printf_error(ER_WRONG_KEY_COLUMN, ER(ER_WRONG_KEY_COLUMN), MYF(0),
column->field_name);
DBUG_RETURN(-1);
}
key_part_info->length=(uint8) length;
/* Use packed keys for long strings on the first column */
if (!(db_options & HA_OPTION_NO_PACK_KEYS) &&
(length >= KEY_DEFAULT_PACK_LENGTH &&
(sql_field->sql_type == FIELD_TYPE_STRING ||
sql_field->sql_type == FIELD_TYPE_VAR_STRING ||
sql_field->pack_flag & FIELDFLAG_BLOB)))
{
if (column_nr == 0 && (sql_field->pack_flag & FIELDFLAG_BLOB))
key_info->flags|= HA_BINARY_PACK_KEY;
else
key_info->flags|= HA_PACK_KEY;
}
key_length+=length;
key_part_info++;
/* Create the key name based on the first column (if not given) */
if (column_nr == 0)
{
if (key->type == Key::PRIMARY)
{
if (primary_key)
{
my_error(ER_MULTIPLE_PRI_KEY,MYF(0));
DBUG_RETURN(-1);
}
key_name=primary_key_name;
primary_key=1;
}
else if (!(key_name = key->name()))
key_name=make_unique_key_name(sql_field->field_name,
key_info_buffer,key_info);
if (check_if_keyname_exists(key_name,key_info_buffer,key_info))
{
my_error(ER_DUP_KEYNAME,MYF(0),key_name);
DBUG_RETURN(-1);
}
key_info->name=(char*) key_name;
}
}
if (!(key_info->flags & HA_NULL_PART_KEY))
unique_key=1;
key_info->key_length=(uint16) key_length;
uint max_key_length= min(file->max_key_length(), MAX_KEY_LENGTH);
if (key_length > max_key_length && key->type != Key::FULLTEXT)
{
my_error(ER_TOO_LONG_KEY,MYF(0),max_key_length);
DBUG_RETURN(-1);
}
}
if (!unique_key && !primary_key &&
(file->table_flags() & HA_REQUIRE_PRIMARY_KEY))
{
my_error(ER_REQUIRES_PRIMARY_KEY,MYF(0));
DBUG_RETURN(-1);
}
if (auto_increment > 0)
{
my_error(ER_WRONG_AUTO_KEY,MYF(0));
DBUG_RETURN(-1);
}
/* Sort keys in optimized order */
qsort((gptr) key_info_buffer, key_count, sizeof(KEY), (qsort_cmp) sort_keys);
/* Check if table exists */
if (create_info->options & HA_LEX_CREATE_TMP_TABLE)
{
sprintf(path,"%s%s%lx_%lx_%x%s",mysql_tmpdir,tmp_file_prefix,
current_pid, thd->thread_id, thd->tmp_table++,reg_ext);
create_info->table_options|=HA_CREATE_DELAY_KEY_WRITE;
}
else
(void) sprintf(path,"%s/%s/%s%s",mysql_data_home,db,table_name,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)
DBUG_RETURN(0);
my_error(ER_TABLE_EXISTS_ERROR,MYF(0),table_name);
DBUG_RETURN(-1);
}
VOID(pthread_mutex_lock(&LOCK_open));
if (!tmp_table && !(create_info->options & HA_LEX_CREATE_TMP_TABLE))
{
if (!access(path,F_OK))
{
VOID(pthread_mutex_unlock(&LOCK_open));
if (create_info->options & HA_LEX_CREATE_IF_NOT_EXISTS)
DBUG_RETURN(0);
my_error(ER_TABLE_EXISTS_ERROR,MYF(0),table_name);
DBUG_RETURN(-1);
}
}
thd->proc_info="creating table";
create_info->table_options=db_options;
if (rea_create_table(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;
}
}
if (!tmp_table && !no_log)
{
// Must be written before unlock
mysql_update_log.write(thd,thd->query, thd->query_length);
if (mysql_bin_log.is_open())
{
Query_log_event qinfo(thd, thd->query, thd->query_length,
test(create_info->options &
HA_LEX_CREATE_TMP_TABLE));
mysql_bin_log.write(&qinfo);
}
}
error=0;
end:
VOID(pthread_mutex_unlock(&LOCK_open));
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(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))
return (char*) field_name; // Use fieldname
buff_end=strmake(buff,field_name,MAX_FIELD_NAME-4);
for (uint i=2 ; ; i++)
{
sprintf(buff_end,"_%d",i);
if (!check_if_keyname_exists(buff,start,end))
return sql_strdup(buff);
}
}
/****************************************************************************
** Create table from a list of fields and items
****************************************************************************/
TABLE *create_table_from_items(THD *thd, HA_CREATE_INFO *create_info,
const char *db, const char *name,
List<create_field> *extra_fields,
List<Key> *keys,
List<Item> *items,
MYSQL_LOCK **lock)
{
TABLE tmp_table; // Used during 'create_field()'
TABLE *table;
tmp_table.table_name=0;
DBUG_ENTER("create_table_from_items");
/* Add selected items to field list */
List_iterator_fast<Item> it(*items);
Item *item;
Field *tmp_field;
tmp_table.db_create_options=0;
tmp_table.null_row=tmp_table.maybe_null=0;
tmp_table.blob_ptr_size=portable_sizeof_char_ptr;
tmp_table.db_low_byte_first= test(create_info->db_type == DB_TYPE_MYISAM ||
create_info->db_type == DB_TYPE_HEAP);
while ((item=it++))
{
create_field *cr_field;
Field *field;
if (item->type() == Item::FUNC_ITEM)
field=item->tmp_table_field(&tmp_table);
else
field=create_tmp_field(thd, &tmp_table, item, item->type(),
(Item ***) 0, &tmp_field,0,0);
if (!field ||
!(cr_field=new create_field(field,(item->type() == Item::FIELD_ITEM ?
((Item_field *)item)->field :
(Field*) 0))))
DBUG_RETURN(0);
extra_fields->push_back(cr_field);
}
/* create and lock table */
/* QQ: This should be done atomic ! */
if (mysql_create_table(thd,db,name,create_info,*extra_fields,
*keys,0,1)) // no logging
DBUG_RETURN(0);
if (!(table=open_table(thd,db,name,name,(bool*) 0)))
{
quick_rm_table(create_info->db_type,db,name);
DBUG_RETURN(0);
}
table->reginfo.lock_type=TL_WRITE;
if (!((*lock)=mysql_lock_tables(thd,&table,1)))
{
VOID(pthread_mutex_lock(&LOCK_open));
hash_delete(&open_cache,(byte*) table);
VOID(pthread_mutex_unlock(&LOCK_open));
quick_rm_table(create_info->db_type,db,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];
handler *file=get_new_handler((TABLE*) 0, base);
int error=0;
DBUG_ENTER("mysql_rename_table");
(void) sprintf(from,"%s/%s/%s",mysql_data_home,old_db,old_name);
(void) sprintf(to,"%s/%s/%s",mysql_data_home,new_db,new_name);
fn_format(from,from,"","",4);
fn_format(to,to, "","",4);
if (!(error=file->rename_table((const char*) from,(const char *) to)))
{
if (rename_file_ext(from,to,reg_ext))
{
error=my_errno;
/* Restore old file name */
file->rename_table((const char*) to,(const char *) from);
}
}
delete file;
if (error)
my_error(ER_ERROR_ON_RENAME, MYF(0), from, to, error);
DBUG_RETURN(error != 0);
}
/*
close table in this thread and force close + reopen in other threads
This assumes that the calling thread has lock on LOCK_open
Win32 clients must also have a WRITE LOCK on the table !
*/
static void safe_remove_from_cache(THD *thd,TABLE *table)
{
DBUG_ENTER("safe_remove_from_cache");
if (table)
{
DBUG_PRINT("enter",("table: %s", table->real_name));
VOID(table->file->extra(HA_EXTRA_FORCE_REOPEN)); // Close all data files
/* Mark all tables that are in use as 'old' */
mysql_lock_abort(thd,table); // end threads waiting on lock
#if defined(USING_TRANSACTIONS) || defined( __WIN__) || defined( __EMX__) || !defined(OS2)
/* Wait until all there are no other threads that has this table open */
while (remove_table_from_cache(thd,table->table_cache_key,
table->real_name))
{
dropping_tables++;
(void) pthread_cond_wait(&COND_refresh,&LOCK_open);
dropping_tables--;
}
#else
(void) remove_table_from_cache(thd,table->table_cache_key,
table->real_name);
#endif
/* When lock on LOCK_open is freed other threads can continue */
pthread_cond_broadcast(&COND_refresh);
}
DBUG_VOID_RETURN;
}
bool close_cached_table(THD *thd,TABLE *table)
{
DBUG_ENTER("close_cached_table");
safe_mutex_assert_owner(&LOCK_open);
if (table)
{
safe_remove_from_cache(thd,table);
/* 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);
}
DBUG_RETURN(0);
}
static int send_check_errmsg(THD* thd, TABLE_LIST* table,
const char* operator_name, const char* errmsg)
{
String* packet = &thd->packet;
packet->length(0);
net_store_data(packet, table->alias);
net_store_data(packet, (char*)operator_name);
net_store_data(packet, "error");
net_store_data(packet, errmsg);
thd->net.last_error[0]=0;
if (my_net_write(&thd->net, (char*) thd->packet.ptr(),
packet->length()))
return -1;
return 1;
}
static int prepare_for_restore(THD* thd, TABLE_LIST* table,
HA_CHECK_OPT *check_opt)
{
DBUG_ENTER("prepare_for_restore");
if (table->table) // do not overwrite existing tables on restore
{
DBUG_RETURN(send_check_errmsg(thd, table, "restore",
"table exists, will not overwrite on restore"
));
}
else
{
char* backup_dir = thd->lex.backup_dir;
char src_path[FN_REFLEN], dst_path[FN_REFLEN];
char* table_name = table->real_name;
char* db = thd->db ? thd->db : table->db;
if (fn_format_relative_to_data_home(src_path, table_name, backup_dir,
reg_ext))
DBUG_RETURN(-1); // protect buffer overflow
sprintf(dst_path, "%s/%s/%s", mysql_real_data_home, db, table_name);
if (lock_and_wait_for_table_name(thd,table))
DBUG_RETURN(-1);
if (my_copy(src_path,
fn_format(dst_path, dst_path,"", reg_ext, 4),
MYF(MY_WME)))
{
pthread_mutex_lock(&LOCK_open);
unlock_table_name(thd, table);
pthread_mutex_unlock(&LOCK_open);
DBUG_RETURN(send_check_errmsg(thd, table, "restore",
"Failed copying .frm file"));
}
if (mysql_truncate(thd, table, 1))
{
pthread_mutex_lock(&LOCK_open);
unlock_table_name(thd, table);
pthread_mutex_unlock(&LOCK_open);
DBUG_RETURN(send_check_errmsg(thd, table, "restore",
"Failed generating table from .frm file"));
}
}
/*
Now we should be able to open the partially restored table
to finish the restore in the handler later on
*/
if (!(table->table = reopen_name_locked_table(thd, table)))
{
pthread_mutex_lock(&LOCK_open);
unlock_table_name(thd, table);
pthread_mutex_unlock(&LOCK_open);
}
DBUG_RETURN(0);
}
static int prepare_for_repair(THD* thd, TABLE_LIST* table,
HA_CHECK_OPT *check_opt)
{
DBUG_ENTER("prepare_for_repair");
if (!(check_opt->sql_flags & TT_USEFRM))
{
DBUG_RETURN(0);
}
else
{
char from[FN_REFLEN],tmp[FN_REFLEN];
char* db = thd->db ? thd->db : table->db;
sprintf(from, "%s/%s/%s", mysql_real_data_home, db, table->real_name);
fn_format(from, from, "", MI_NAME_DEXT, 4);
sprintf(tmp,"%s-%lx_%lx", from, current_pid, thd->thread_id);
pthread_mutex_lock(&LOCK_open);
close_cached_table(thd,table->table);
pthread_mutex_unlock(&LOCK_open);
if (lock_and_wait_for_table_name(thd,table))
DBUG_RETURN(-1);
if (my_rename(from, tmp, 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, "repair",
"Failed renaming .MYD 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, "repair",
"Failed generating table from .frm file"));
}
if (my_rename(tmp, from, 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, "repair",
"Failed restoring .MYD file"));
}
}
/*
Now we should be able to open the partially repaired table
to finish the repair 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 mysql_admin_table(THD* thd, TABLE_LIST* tables,
HA_CHECK_OPT* check_opt,
const char *operator_name,
thr_lock_type lock_type,
bool open_for_modify,
uint extra_open_options,
int (*prepare_func)(THD *, TABLE_LIST *,
HA_CHECK_OPT *),
int (handler::*operator_func)
(THD *, HA_CHECK_OPT *))
{
TABLE_LIST *table;
List<Item> field_list;
Item* item;
String* packet = &thd->packet;
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 (send_fields(thd, field_list, 1))
DBUG_RETURN(-1);
for (table = tables; table; table = table->next)
{
char table_name[NAME_LEN*2+2];
char* db = (table->db) ? table->db : thd->db;
bool fatal_error=0;
strxmov(table_name,db ? db : "",".",table->real_name,NullS);
thd->open_options|= extra_open_options;
table->table = open_ltable(thd, table, lock_type);
thd->open_options&= ~extra_open_options;
packet->length(0);
if (prepare_func)
{
switch ((*prepare_func)(thd, table, check_opt)) {
case 1: continue; // error, message written to net
case -1: goto err; // error, message could be written to net
default: ; // should be 0 otherwise
}
}
if (!table->table)
{
const char *err_msg;
net_store_data(packet, table_name);
net_store_data(packet, operator_name);
net_store_data(packet, "error");
if (!(err_msg=thd->net.last_error))
err_msg=ER(ER_CHECK_NO_SUCH_TABLE);
net_store_data(packet, err_msg);
thd->net.last_error[0]=0;
if (my_net_write(&thd->net, (char*) thd->packet.ptr(),
packet->length()))
goto err;
continue;
}
if ((table->table->db_stat & HA_READ_ONLY) && open_for_modify)
{
char buff[FN_REFLEN + MYSQL_ERRMSG_SIZE];
net_store_data(packet, table_name);
net_store_data(packet, operator_name);
net_store_data(packet, "error");
sprintf(buff, ER(ER_OPEN_AS_READONLY), table_name);
net_store_data(packet, buff);
close_thread_tables(thd);
table->table=0; // For query cache
if (my_net_write(&thd->net, (char*) thd->packet.ptr(),
packet->length()))
goto err;
continue;
}
/* Close all instances of the table to allow repair to rename files */
if (lock_type == TL_WRITE && table->table->version)
{
pthread_mutex_lock(&LOCK_open);
const char *old_message=thd->enter_cond(&COND_refresh, &LOCK_open,
"Waiting to get writelock");
mysql_lock_abort(thd,table->table);
while (remove_table_from_cache(thd, table->table->table_cache_key,
table->table->real_name) &&
! thd->killed)
{
dropping_tables++;
(void) pthread_cond_wait(&COND_refresh,&LOCK_open);
dropping_tables--;
}
thd->exit_cond(old_message);
pthread_mutex_unlock(&LOCK_open);
if (thd->killed)
goto err;
open_for_modify=0;
}
int result_code = (table->table->file->*operator_func)(thd, check_opt);
packet->length(0);
net_store_data(packet, table_name);
net_store_data(packet, operator_name);
switch (result_code) {
case HA_ADMIN_NOT_IMPLEMENTED:
{
char buf[ERRMSGSIZE+20];
my_snprintf(buf, ERRMSGSIZE,
ER(ER_CHECK_NOT_IMPLEMENTED), operator_name);
net_store_data(packet, "error");
net_store_data(packet, buf);
}
break;
case HA_ADMIN_OK:
net_store_data(packet, "status");
net_store_data(packet, "OK");
break;
case HA_ADMIN_FAILED:
net_store_data(packet, "status");
net_store_data(packet, "Operation failed");
break;
case HA_ADMIN_ALREADY_DONE:
net_store_data(packet, "status");
net_store_data(packet, "Table is already up to date");
break;
case HA_ADMIN_CORRUPT:
net_store_data(packet, "error");
net_store_data(packet, "Corrupt");
fatal_error=1;
break;
case HA_ADMIN_INVALID:
net_store_data(packet, "error");
net_store_data(packet, "Invalid argument");
break;
default: // Probably HA_ADMIN_INTERNAL_ERROR
net_store_data(packet, "error");
net_store_data(packet, "Unknown - internal error during operation");
fatal_error=1;
break;
}
if (fatal_error)
table->table->version=0; // Force close of table
else if (open_for_modify)
{
pthread_mutex_lock(&LOCK_open);
remove_table_from_cache(thd, table->table->table_cache_key,
table->table->real_name);
pthread_mutex_unlock(&LOCK_open);
/* May be something modified consequently we have to invalidate cache */
query_cache_invalidate3(thd, table->table, 0);
}
close_thread_tables(thd);
table->table=0; // For query cache
if (my_net_write(&thd->net, (char*) packet->ptr(),
packet->length()))
goto err;
}
send_eof(&thd->net);
DBUG_RETURN(0);
err:
close_thread_tables(thd); // Shouldn't be needed
if (table)
table->table=0;
DBUG_RETURN(-1);
}
int mysql_backup_table(THD* thd, TABLE_LIST* table_list)
{
DBUG_ENTER("mysql_backup_table");
DBUG_RETURN(mysql_admin_table(thd, table_list, 0,
"backup", TL_READ, 0, 0, 0,
&handler::backup));
}
int mysql_restore_table(THD* thd, TABLE_LIST* table_list)
{
DBUG_ENTER("mysql_restore_table");
DBUG_RETURN(mysql_admin_table(thd, table_list, 0,
"restore", TL_WRITE, 1, 0,
&prepare_for_restore,
&handler::restore));
}
int mysql_repair_table(THD* thd, TABLE_LIST* tables, HA_CHECK_OPT* check_opt)
{
DBUG_ENTER("mysql_repair_table");
DBUG_RETURN(mysql_admin_table(thd, tables, check_opt,
"repair", TL_WRITE, 1, HA_OPEN_FOR_REPAIR,
&prepare_for_repair,
&handler::repair));
}
int mysql_optimize_table(THD* thd, TABLE_LIST* tables, HA_CHECK_OPT* check_opt)
{
DBUG_ENTER("mysql_optimize_table");
DBUG_RETURN(mysql_admin_table(thd, tables, check_opt,
"optimize", TL_WRITE, 1,0,0,
&handler::optimize));
}
int mysql_analyze_table(THD* thd, TABLE_LIST* tables, HA_CHECK_OPT* check_opt)
{
#ifdef OS2
thr_lock_type lock_type = TL_WRITE;
#else
thr_lock_type lock_type = TL_READ_NO_INSERT;
#endif
DBUG_ENTER("mysql_analyze_table");
DBUG_RETURN(mysql_admin_table(thd, tables, check_opt,
"analyze", lock_type, 1,0,0,
&handler::analyze));
}
int mysql_check_table(THD* thd, TABLE_LIST* tables,HA_CHECK_OPT* check_opt)
{
#ifdef OS2
thr_lock_type lock_type = TL_WRITE;
#else
thr_lock_type lock_type = TL_READ_NO_INSERT;
#endif
DBUG_ENTER("mysql_check_table");
DBUG_RETURN(mysql_admin_table(thd, tables, check_opt,
"check", lock_type,
0, HA_OPEN_FOR_REPAIR, 0,
&handler::check));
}
int mysql_alter_table(THD *thd,char *new_db, char *new_name,
HA_CREATE_INFO *create_info,
TABLE_LIST *table_list,
List<create_field> &fields,
List<Key> &keys,List<Alter_drop> &drop_list,
List<Alter_column> &alter_list,
ORDER *order,
bool drop_primary,
enum enum_duplicates handle_duplicates,
enum enum_enable_or_disable keys_onoff,
bool simple_alter)
{
TABLE *table,*new_table;
int error;
char tmp_name[80],old_name[32],new_name_buff[FN_REFLEN],
*table_name,*db;
char index_file[FN_REFLEN], data_file[FN_REFLEN];
bool use_timestamp=0;
ha_rows copied,deleted;
ulonglong next_insert_id;
uint save_time_stamp,db_create_options, used_fields;
enum db_type old_db_type,new_db_type;
DBUG_ENTER("mysql_alter_table");
thd->proc_info="init";
table_name=table_list->real_name;
db=table_list->db;
if (!new_db || !strcmp(new_db,db))
new_db=db;
used_fields=create_info->used_fields;
mysql_ha_closeall(thd, table_list);
if (!(table=open_ltable(thd,table_list,TL_WRITE_ALLOW_READ)))
DBUG_RETURN(-1);
/* Check that we are not trying to rename to an existing table */
if (new_name)
{
strmov(new_name_buff,new_name);
fn_same(new_name_buff,table_name,3);
if (lower_case_table_names)
casedn_str(new_name);
if ((lower_case_table_names &&
!my_strcasecmp(new_name_buff,table_name)) ||
(!lower_case_table_names &&
!strcmp(new_name_buff,table_name)))
new_name=table_name; // No. Make later check easier
else
{
if (table->tmp_table)
{
if (find_temporary_table(thd,new_db,new_name_buff))
{
my_error(ER_TABLE_EXISTS_ERROR,MYF(0),new_name);
DBUG_RETURN(-1);
}
}
else
{
if (!access(fn_format(new_name_buff,new_name_buff,new_db,reg_ext,0),
F_OK))
{
/* Table will be closed in do_command() */
my_error(ER_TABLE_EXISTS_ERROR,MYF(0),new_name);
DBUG_RETURN(-1);
}
}
}
}
else
new_name=table_name;
old_db_type=table->db_type;
if (create_info->db_type == DB_TYPE_DEFAULT)
create_info->db_type=old_db_type;
new_db_type=create_info->db_type= ha_checktype(create_info->db_type);
if (create_info->row_type == ROW_TYPE_NOT_USED)
create_info->row_type=table->row_type;
/* In some simple cases we need not to recreate the table */
thd->proc_info="setup";
if (simple_alter && !table->tmp_table)
{
error=0;
if (new_name != table_name || new_db != db)
{
thd->proc_info="rename";
VOID(pthread_mutex_lock(&LOCK_open));
/* Then do a 'simple' rename of the table */
error=0;
if (!access(new_name_buff,F_OK))
{
my_error(ER_TABLE_EXISTS_ERROR,MYF(0),new_name);
error= -1;
}
else
{
*fn_ext(new_name)=0;
close_cached_table(thd,table);
if (mysql_rename_table(old_db_type,db,table_name,new_db,new_name))
error= -1;
}
VOID(pthread_cond_broadcast(&COND_refresh));
VOID(pthread_mutex_unlock(&LOCK_open));
}
if (!error)
{
switch (keys_onoff) {
case LEAVE_AS_IS:
break;
case ENABLE:
safe_remove_from_cache(thd,table);
error= table->file->activate_all_index(thd);
break;
case DISABLE:
safe_remove_from_cache(thd,table);
table->file->deactivate_non_unique_index(HA_POS_ERROR);
break;
}
}
if (!error)
{
mysql_update_log.write(thd, thd->query, thd->query_length);
if (mysql_bin_log.is_open())
{
Query_log_event qinfo(thd, thd->query, thd->query_length, 0);
mysql_bin_log.write(&qinfo);
}
send_ok(&thd->net);
}
table_list->table=0; // For query cache
query_cache_invalidate3(thd, table_list, 0);
DBUG_RETURN(error);
}
/* Full alter table */
restore_record(table,2); // Empty record for DEFAULT
List_iterator<Alter_drop> drop_it(drop_list);
List_iterator<create_field> def_it(fields);
List_iterator<Alter_column> alter_it(alter_list);
List<create_field> create_list; // Add new fields here
List<Key> key_list; // Add new keys here
/*
** First collect all fields from table which isn't in drop_list
*/
create_field *def;
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(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(field->field_name, def->change))
break;
}
if (def)
{ // Field is changed
def->field=field;
if (def->sql_type == FIELD_TYPE_TIMESTAMP)
use_timestamp=1;
if (!def->after)
{
create_list.push_back(def);
def_it.remove();
}
}
else
{ // Use old field value
create_list.push_back(def=new create_field(field,field));
if (def->sql_type == FIELD_TYPE_TIMESTAMP)
use_timestamp=1;
alter_it.rewind(); // Change default if ALTER
Alter_column *alter;
while ((alter=alter_it++))
{
if (!my_strcasecmp(field->field_name, alter->name))
break;
}
if (alter)
{
if (def->sql_type == FIELD_TYPE_BLOB)
{
my_error(ER_BLOB_CANT_HAVE_DEFAULT,MYF(0),def->change);
DBUG_RETURN(-1);
}
def->def=alter->def; // Use new default
alter_it.remove();
}
}
}
def_it.rewind();
List_iterator<create_field> find_it(create_list);
while ((def=def_it++)) // Add new columns
{
if (def->change && ! def->field)
{
my_error(ER_BAD_FIELD_ERROR,MYF(0),def->change,table_name);
DBUG_RETURN(-1);
}
if (!def->after)
create_list.push_back(def);
else if (def->after == first_keyword)
create_list.push_front(def);
else
{
create_field *find;
find_it.rewind();
while ((find=find_it++)) // Add new columns
{
if (!my_strcasecmp(def->after, find->field_name))
break;
}
if (!find)
{
my_error(ER_BAD_FIELD_ERROR,MYF(0),def->after,table_name);
DBUG_RETURN(-1);
}
find_it.after(def); // Put element after this
}
}
if (alter_list.elements)
{
my_error(ER_BAD_FIELD_ERROR,MYF(0),alter_list.head()->name,table_name);
DBUG_RETURN(-1);
}
if (!create_list.elements)
{
my_error(ER_CANT_REMOVE_ALL_FIELDS,MYF(0));
DBUG_RETURN(-1);
}
/*
** Collect all keys which isn't in drop list. Add only those
** for which some fields exists.
*/
List_iterator<Key> key_it(keys);
List_iterator<create_field> field_it(create_list);
List<key_part_spec> key_parts;
KEY *key_info=table->key_info;
for (uint i=0 ; i < table->keys ; i++,key_info++)
{
if (drop_primary && (key_info->flags & HA_NOSAME))
{
drop_primary=0;
continue;
}
char *key_name=key_info->name;
Alter_drop *drop;
drop_it.rewind();
while ((drop=drop_it++))
{
if (drop->type == Alter_drop::KEY &&
!my_strcasecmp(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(key_part_name, cfield->change))
break;
}
else if (!my_strcasecmp(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 != cfield->pack_length ||
cfield->pack_length <= key_part_length))
key_part_length=0; // Use whole field
}
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_NOSAME ?
(!my_strcasecmp(key_name, "PRIMARY") ?
Key::PRIMARY : Key::UNIQUE) :
(key_info->flags & HA_FULLTEXT ?
Key::FULLTEXT : Key::MULTIPLE),
key_name,key_parts));
}
key_it.rewind();
{
Key *key;
while ((key=key_it++)) // Add new keys
key_list.push_back(key);
}
if (drop_list.elements)
{
my_error(ER_CANT_DROP_FIELD_OR_KEY,MYF(0),drop_list.head()->name);
goto err;
}
if (alter_list.elements)
{
my_error(ER_CANT_DROP_FIELD_OR_KEY,MYF(0),alter_list.head()->name);
goto err;
}
db_create_options=table->db_create_options & ~(HA_OPTION_PACK_RECORD);
(void) sprintf(tmp_name,"%s-%lx_%lx", tmp_file_prefix, current_pid,
thd->thread_id);
create_info->db_type=new_db_type;
if (!create_info->comment)
create_info->comment=table->comment;
/* let new create options override the old ones */
if (!(used_fields & HA_CREATE_USED_MIN_ROWS))
create_info->min_rows=table->min_rows;
if (!(used_fields & HA_CREATE_USED_MAX_ROWS))
create_info->max_rows=table->max_rows;
if (!(used_fields & HA_CREATE_USED_AVG_ROW_LENGTH))
create_info->avg_row_length=table->avg_row_length;
table->file->update_create_info(create_info);
if ((create_info->table_options &
(HA_OPTION_PACK_KEYS | HA_OPTION_NO_PACK_KEYS)) ||
(used_fields & HA_CREATE_USED_PACK_KEYS))
db_create_options&= ~(HA_OPTION_PACK_KEYS | HA_OPTION_NO_PACK_KEYS);
if (create_info->table_options &
(HA_OPTION_CHECKSUM | HA_OPTION_NO_CHECKSUM))
db_create_options&= ~(HA_OPTION_CHECKSUM | HA_OPTION_NO_CHECKSUM);
if (create_info->table_options &
(HA_OPTION_DELAY_KEY_WRITE | HA_OPTION_NO_DELAY_KEY_WRITE))
db_create_options&= ~(HA_OPTION_DELAY_KEY_WRITE |
HA_OPTION_NO_DELAY_KEY_WRITE);
create_info->table_options|= db_create_options;
if (table->tmp_table)
create_info->options|=HA_LEX_CREATE_TMP_TABLE;
/*
Handling of symlinked tables:
If no rename:
Create new data file and index file on the same disk as the
old data and index files.
Copy data.
Rename new data file over old data file and new index file over
old index file.
Symlinks are not changed.
If rename:
Create new data file and index file on the same disk as the
old data and index files. Create also symlinks to point at
the new tables.
Copy data.
At end, rename temporary tables and symlinks to temporary table
to final table name.
Remove old table and old symlinks
If rename is made to another database:
Create new tables in new database.
Copy data.
Remove old table and symlinks.
*/
if (!strcmp(db, new_db)) // Ignore symlink if db changed
{
if (create_info->index_file_name)
{
/* Fix index_file_name to have 'tmp_name' as basename */
strmov(index_file, tmp_name);
create_info->index_file_name=fn_same(index_file,
create_info->index_file_name,
1);
}
if (create_info->data_file_name)
{
/* Fix data_file_name to have 'tmp_name' as basename */
strmov(data_file, tmp_name);
create_info->data_file_name=fn_same(data_file,
create_info->data_file_name,
1);
}
}
else
create_info->data_file_name=create_info->index_file_name=0;
if ((error=mysql_create_table(thd, new_db, tmp_name,
create_info,
create_list,key_list,1,1))) // no logging
DBUG_RETURN(error);
if (table->tmp_table)
new_table=open_table(thd,new_db,tmp_name,tmp_name,0);
else
{
char path[FN_REFLEN];
(void) sprintf(path,"%s/%s/%s",mysql_data_home,new_db,tmp_name);
fn_format(path,path,"","",4);
new_table=open_temporary_table(thd, path, new_db, tmp_name,0);
}
if (!new_table)
{
VOID(quick_rm_table(new_db_type,new_db,tmp_name));
goto err;
}
save_time_stamp=new_table->time_stamp;
if (use_timestamp)
new_table->time_stamp=0;
new_table->next_number_field=new_table->found_next_number_field;
thd->count_cuted_fields=1; // calc cuted fields
thd->cuted_fields=0L;
thd->proc_info="copy to tmp table";
next_insert_id=thd->next_insert_id; // Remember for loggin
copied=deleted=0;
if (!new_table->is_view)
error=copy_data_between_tables(table,new_table,create_list,
handle_duplicates,
order, &copied, &deleted);
thd->last_insert_id=next_insert_id; // Needed for correct log
thd->count_cuted_fields=0; // Don`t calc cuted fields
new_table->time_stamp=save_time_stamp;
if (table->tmp_table)
{
/* We changed a temporary table */
if (error)
{
/*
The following function call will free the new_table pointer,
in close_temporary_table(), so we can safely directly jump to err
*/
close_temporary_table(thd,new_db,tmp_name);
goto err;
}
/* Close lock if this is a transactional table */
if (thd->lock)
{
mysql_unlock_tables(thd, thd->lock);
thd->lock=0;
}
/* Remove link to old table and rename the new one */
close_temporary_table(thd,table->table_cache_key,table_name);
if (rename_temporary_table(thd, new_table, new_db, new_name))
{ // Fatal error
close_temporary_table(thd,new_db,tmp_name);
my_free((gptr) new_table,MYF(0));
goto err;
}
mysql_update_log.write(thd, thd->query,thd->query_length);
if (mysql_bin_log.is_open())
{
Query_log_event qinfo(thd, thd->query, thd->query_length, 0);
mysql_bin_log.write(&qinfo);
}
goto end_temporary;
}
intern_close_table(new_table); /* close temporary table */
my_free((gptr) new_table,MYF(0));
VOID(pthread_mutex_lock(&LOCK_open));
if (error)
{
VOID(quick_rm_table(new_db_type,new_db,tmp_name));
VOID(pthread_mutex_unlock(&LOCK_open));
goto err;
}
/*
** Data is copied. Now we rename the old table to a temp name,
** rename the new one to the old name, remove all entries from the old table
** from the cash, free all locks, close the old table and remove it.
*/
thd->proc_info="rename result table";
sprintf(old_name,"%s2-%lx-%lx", tmp_file_prefix, current_pid,
thd->thread_id);
if (new_name != table_name || new_db != db)
{
if (!access(new_name_buff,F_OK))
{
error=1;
my_error(ER_TABLE_EXISTS_ERROR,MYF(0),new_name_buff);
VOID(quick_rm_table(new_db_type,new_db,tmp_name));
VOID(pthread_mutex_unlock(&LOCK_open));
goto err;
}
}
#if (!defined( __WIN__) && !defined( __EMX__) && !defined( OS2))
if (table->file->has_transactions())
#endif
{
/*
Win32 and InnoDB can't drop a table that is in use, so we must
close the original table at before doing the rename
*/
table_name=thd->strdup(table_name); // must be saved
if (close_cached_table(thd,table))
{ // Aborted
VOID(quick_rm_table(new_db_type,new_db,tmp_name));
VOID(pthread_mutex_unlock(&LOCK_open));
goto err;
}
table=0; // Marker that table is closed
}
#if (!defined( __WIN__) && !defined( __EMX__) && !defined( OS2))
else
table->file->extra(HA_EXTRA_FORCE_REOPEN); // Don't use this file anymore
#endif
error=0;
if (mysql_rename_table(old_db_type,db,table_name,db,old_name))
{
error=1;
VOID(quick_rm_table(new_db_type,new_db,tmp_name));
}
else if (mysql_rename_table(new_db_type,new_db,tmp_name,new_db,
new_name))
{ // Try to get everything back
error=1;
VOID(quick_rm_table(new_db_type,new_db,new_name));
VOID(quick_rm_table(new_db_type,new_db,tmp_name));
VOID(mysql_rename_table(old_db_type,db,old_name,db,table_name));
}
if (error)
{
/*
This shouldn't happen. We solve this the safe way by
closing the locked 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
*/
close_cached_table(thd,table);
VOID(quick_rm_table(old_db_type,db,old_name));
}
else
{
/*
Using LOCK TABLES without rename.
This code is never executed on WIN32!
Remove old renamed table, reopen table and get new locks
*/
if (table)
{
VOID(table->file->extra(HA_EXTRA_FORCE_REOPEN)); // Use new file
remove_table_from_cache(thd,db,table_name); // Mark all in-use copies old
mysql_lock_abort(thd,table); // end threads waiting on lock
}
VOID(quick_rm_table(old_db_type,db,old_name));
if (close_data_tables(thd,db,table_name) ||
reopen_tables(thd,1,0))
{ // This shouldn't happen
close_cached_table(thd,table); // Remove lock for table
VOID(pthread_mutex_unlock(&LOCK_open));
goto err;
}
}
/* The ALTER TABLE is always in it's own transaction */
error = ha_commit_stmt(thd);
if (ha_commit(thd))
error=1;
if (error)
{
VOID(pthread_mutex_unlock(&LOCK_open));
VOID(pthread_cond_broadcast(&COND_refresh));
goto err;
}
thd->proc_info="end";
mysql_update_log.write(thd, thd->query,thd->query_length);
if (mysql_bin_log.is_open())
{
Query_log_event qinfo(thd, thd->query, thd->query_length, 0);
mysql_bin_log.write(&qinfo);
}
VOID(pthread_cond_broadcast(&COND_refresh));
VOID(pthread_mutex_unlock(&LOCK_open));
#ifdef HAVE_BERKELEY_DB
if (old_db_type == DB_TYPE_BERKELEY_DB)
{
/*
For the alter table to be properly flushed to the logs, we
have to open the new table. If not, we get a problem on server
shutdown.
*/
char path[FN_REFLEN];
(void) sprintf(path,"%s/%s/%s",mysql_data_home,new_db,table_name);
fn_format(path,path,"","",4);
table=open_temporary_table(thd, path, new_db, tmp_name,0);
if (table)
{
intern_close_table(table);
my_free((char*) table, MYF(0));
}
else
sql_print_error("Warning: Could not open BDB table %s.%s after rename\n",
new_db,table_name);
(void) berkeley_flush_logs();
}
#endif
table_list->table=0; // For query cache
query_cache_invalidate3(thd, table_list, 0);
end_temporary:
sprintf(tmp_name,ER(ER_INSERT_INFO),(ulong) (copied+deleted),
(ulong) deleted, thd->cuted_fields);
send_ok(&thd->net,copied+deleted,0L,tmp_name);
thd->some_tables_deleted=0;
DBUG_RETURN(0);
err:
DBUG_RETURN(-1);
}
static int
copy_data_between_tables(TABLE *from,TABLE *to,
List<create_field> &create,
enum enum_duplicates handle_duplicates,
ORDER *order,
ha_rows *copied,
ha_rows *deleted)
{
int error;
Copy_field *copy,*copy_end;
ulong found_count,delete_count;
THD *thd= current_thd;
uint length;
SORT_FIELD *sortorder;
READ_RECORD info;
Field *next_field;
TABLE_LIST tables;
List<Item> fields;
List<Item> all_fields;
ha_rows examined_rows;
DBUG_ENTER("copy_data_between_tables");
if (!(copy= new Copy_field[to->fields]))
DBUG_RETURN(-1); /* purecov: inspected */
to->file->external_lock(thd,F_WRLCK);
to->file->extra(HA_EXTRA_WRITE_CACHE);
from->file->info(HA_STATUS_VARIABLE);
to->file->deactivate_non_unique_index(from->file->records);
List_iterator<create_field> it(create);
create_field *def;
copy_end=copy;
for (Field **ptr=to->field ; *ptr ; ptr++)
{
def=it++;
if (def->field)
(copy_end++)->set(*ptr,def->field,0);
}
found_count=delete_count=0;
if (order)
{
from->io_cache=(IO_CACHE*) my_malloc(sizeof(IO_CACHE),
MYF(MY_FAE | MY_ZEROFILL));
bzero((char*) &tables,sizeof(tables));
tables.table = from;
tables.alias = tables.real_name= from->real_name;
tables.db = from->table_cache_key;
error=1;
if (setup_order(thd, &tables, fields, all_fields, order) ||
!(sortorder=make_unireg_sortorder(order, &length)) ||
(from->found_records = filesort(from, sortorder, length,
(SQL_SELECT *) 0, 0L, HA_POS_ERROR,
&examined_rows))
== HA_POS_ERROR)
goto err;
};
/* Turn off recovery logging since rollback of an
alter table is to delete the new table so there
is no need to log the changes to it. */
error = ha_recovery_logging(thd,FALSE);
if (error)
{
error = 1;
goto err;
}
init_read_record(&info, thd, from, (SQL_SELECT *) 0, 1,1);
if (handle_duplicates == DUP_IGNORE ||
handle_duplicates == DUP_REPLACE)
to->file->extra(HA_EXTRA_IGNORE_DUP_KEY);
next_field=to->next_number_field;
while (!(error=info.read_record(&info)))
{
if (thd->killed)
{
my_error(ER_SERVER_SHUTDOWN,MYF(0));
error= 1;
break;
}
if (next_field)
next_field->reset();
for (Copy_field *copy_ptr=copy ; copy_ptr != copy_end ; copy_ptr++)
copy_ptr->do_copy(copy_ptr);
if ((error=to->file->write_row((byte*) to->record[0])))
{
if ((handle_duplicates != DUP_IGNORE &&
handle_duplicates != DUP_REPLACE) ||
(error != HA_ERR_FOUND_DUPP_KEY &&
error != HA_ERR_FOUND_DUPP_UNIQUE))
{
to->file->print_error(error,MYF(0));
break;
}
delete_count++;
}
else
found_count++;
}
end_read_record(&info);
free_io_cache(from);
delete [] copy; // This is never 0
uint tmp_error;
if ((tmp_error=to->file->extra(HA_EXTRA_NO_CACHE)))
{
to->file->print_error(tmp_error,MYF(0));
error=1;
}
to->file->extra(HA_EXTRA_NO_IGNORE_DUP_KEY);
if (to->file->activate_all_index(thd))
error=1;
tmp_error = ha_recovery_logging(thd,TRUE);
/*
Ensure that the new table is saved properly to disk so that we
can do a rename
*/
if (ha_commit_stmt(thd))
error=1;
if (ha_commit(thd))
error=1;
if (to->file->external_lock(thd,F_UNLCK))
error=1;
err:
free_io_cache(from);
*copied= found_count;
*deleted=delete_count;
DBUG_RETURN(error > 0 ? -1 : 0);
}
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