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/* Copyright (c) 2018, 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 */
#include <regex>
#include <string>
#include "plugin/ddl_rewriter/ddl_rewriter.h"
bool query_rewritten(const std::string &query, std::string *rewritten_query) {
/*
This plugin is intended to parse DDL generated by SHOW CREATE TABLE,
which starts with 'CREATE TABLE'; hence, we can check the first
character to exit as early as possible.
*/
if (query.length() == 0 || (query[0] != 'C' && query[0] != 'c')) return false;
const std::regex create_table("^CREATE\\s+TABLE",
std::regex::icase | std::regex::nosubs);
if (!regex_search(query, create_table)) return false;
/*
We now know this is a CREATE TABLE statement. So we can go ahead with
replacements.
First, replace DATA|INDEX DIRECTORY = '...', but note:
- Optional preceding and trailing commas.
- Optional assignment operator.
- Path enclosed in single quotes.
- Use of ungreedy patterns to get correct grouping.
*/
std::regex directory_option(
"\\s*,?\\s*(DATA|INDEX)\\s+DIRECTORY\\s*?=?\\s*?[\"'][^\"']+?[\"']\\s*,?"
"\\s*",
std::regex::icase | std::regex::nosubs);
*rewritten_query = std::regex_replace(query, directory_option, " ");
/*
Replace ENCRYPTION option.
*/
std::regex encryption_option(
"\\s*,?\\s*ENCRYPTION\\s*?=?\\s*?[\"'][NY]?[\"']\\s*,?\\s*",
std::regex::icase | std::regex::nosubs);
*rewritten_query =
std::regex_replace(*rewritten_query, encryption_option, " ");
return (*rewritten_query != query);
}
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