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71 lines
2.3 KiB
SQL
71 lines
2.3 KiB
SQL
-- Copyright (c) 2016, Oracle and/or its affiliates. All rights reserved.
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--
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-- This program is free software; you can redistribute it and/or modify
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-- it under the terms of the GNU General Public License as published by
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-- the Free Software Foundation; version 2 of the License.
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--
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-- This program is distributed in the hope that it will be useful,
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-- but WITHOUT ANY WARRANTY; without even the implied warranty of
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-- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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-- GNU General Public License for more details.
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--
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-- You should have received a copy of the GNU General Public License
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-- along with this program; if not, write to the Free Software
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-- Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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DROP FUNCTION IF EXISTS quote_identifier;
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DELIMITER $$
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-- https://dev.mysql.com/doc/refman/5.7/en/identifiers.html
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-- Maximum supported length for any of the current identifiers in 5.7.5+ is 256 characters.
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-- Before that, user variables could have any length.
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--
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-- Based on Paul Dubois' suggestion in Bug #78823/Bug #22011361.
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CREATE DEFINER='mariadb.sys'@'localhost' FUNCTION quote_identifier(in_identifier TEXT)
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RETURNS TEXT CHARSET UTF8
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COMMENT '
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Description
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-----------
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Takes an unquoted identifier (schema name, table name, etc.) and
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returns the identifier quoted with backticks.
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Parameters
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-----------
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in_identifier (TEXT):
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The identifier to quote.
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Returns
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-----------
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TEXT
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Example
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-----------
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mysql> SELECT sys.quote_identifier(''my_identifier'') AS Identifier;
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+-----------------+
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| Identifier |
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+-----------------+
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| `my_identifier` |
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+-----------------+
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1 row in set (0.00 sec)
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mysql> SELECT sys.quote_identifier(''my`idenfier'') AS Identifier;
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+----------------+
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| Identifier |
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+----------------+
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| `my``idenfier` |
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+----------------+
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1 row in set (0.00 sec)
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'
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SQL SECURITY INVOKER
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DETERMINISTIC
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NO SQL
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BEGIN
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RETURN CONCAT('`', REPLACE(in_identifier, '`', '``'), '`');
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END$$
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DELIMITER ;
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