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Current File : /www/server/mysql/src/scripts/sys_schema/functions/extract_table_from_file_name.sql
-- Copyright (c) 2014, 2023, 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 also distributed 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 included with MySQL.
--
-- 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

DROP FUNCTION IF EXISTS extract_table_from_file_name;

DELIMITER $$

CREATE DEFINER='mysql.sys'@'localhost' FUNCTION extract_table_from_file_name (
        path VARCHAR(512)
    )
    RETURNS VARCHAR(64) 
    COMMENT '
Description
-----------

Takes a raw file path, and extracts the table name from it.

Useful for when interacting with Performance Schema data 
concerning IO statistics, for example.

Parameters
-----------

path (VARCHAR(512)):
  The full file path to a data file to extract the table name from.

Returns
-----------

VARCHAR(64)

Example
-----------

mysql> SELECT sys.extract_table_from_file_name(\'/var/lib/mysql/employees/employee.ibd\');
+---------------------------------------------------------------------------+
| sys.extract_table_from_file_name(\'/var/lib/mysql/employees/employee.ibd\') |
+---------------------------------------------------------------------------+
| employee                                                                  |
+---------------------------------------------------------------------------+
1 row in set (0.02 sec)
'
    SQL SECURITY INVOKER
    DETERMINISTIC
    NO SQL
BEGIN
    RETURN LEFT(SUBSTRING_INDEX(REPLACE(SUBSTRING_INDEX(REPLACE(path, '\\', '/'), '/', -1), '@0024', '$'), '.', 1), 64);
END$$

DELIMITER ;

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