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/* Copyright (c) 2000, 2025, Oracle and/or its affiliates.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License, version 2.0,
as published by the Free Software Foundation.
This program is designed to work with certain software (including
but not limited to OpenSSL) that is licensed under separate terms,
as designated in a particular file or component or in included license
documentation. The authors of MySQL hereby grant you an additional
permission to link the program and your derivative works with the
separately licensed software that they have either included with
the program or referenced in the documentation.
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, version 2.0, 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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA */
/* close a isam-database */
#include <stddef.h>
#include "my_dbug.h"
#include "storage/myisam/myisamdef.h"
#include "storage/myisammrg/myrg_def.h"
int myrg_close(MYRG_INFO *info) {
int error = 0, new_error;
MYRG_TABLE *file;
DBUG_TRACE;
/*
Assume that info->children_attached means that this is called from
direct use of MERGE, not from a MySQL server. In this case the
children must be closed and info->rec_per_key_part is part of the
'info' multi_alloc.
If info->children_attached is false, this is called from a MySQL
server. Children are closed independently but info->rec_per_key_part
must be freed.
Just in case of a server panic (myrg_panic()) info->children_attached
might be true. We would close the children though they should be
closed independently and info->rec_per_key_part is not freed.
This should be acceptable for a panic.
In case of a MySQL server and no children, children_attached is
always true. In this case no rec_per_key_part has been allocated.
So it is correct to use the branch where an empty list of tables is
(not) closed.
*/
if (info->children_attached) {
for (file = info->open_tables; file != info->end_table; file++) {
/* purecov: begin inspected */
if ((new_error = mi_close(file->table)))
error = new_error;
else
file->table = nullptr;
/* purecov: end */
}
} else
my_free(info->rec_per_key_part);
delete_queue(&info->by_key);
mysql_mutex_lock(&THR_LOCK_open);
myrg_open_list = list_delete(myrg_open_list, &info->open_list);
mysql_mutex_unlock(&THR_LOCK_open);
mysql_mutex_destroy(&info->mutex);
my_free(info);
if (error) {
set_my_errno(error);
return error;
}
return 0;
}
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