80 lines
2.5 KiB
C++
80 lines
2.5 KiB
C++
/*
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Copyright (c) 2014, 2017, Oracle and/or its affiliates. All rights reserved.
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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, version 2.0,
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as published by the Free Software Foundation.
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This program is also distributed with certain software (including
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but not limited to OpenSSL) that is licensed under separate terms,
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as designated in a particular file or component or in included license
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documentation. The authors of MySQL hereby grant you an additional
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permission to link the program and your derivative works with the
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separately licensed software that they have included with MySQL.
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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, version 2.0, for more details.
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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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*/
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#ifndef SHOW_VARIABLE_QUERY_EXTRACTOR_INCLUDED
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#define SHOW_VARIABLE_QUERY_EXTRACTOR_INCLUDED
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#include <string>
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#include <vector>
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#include "client/base/mysql_query_runner.h"
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#include "my_inttypes.h"
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#include "mysql.h"
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namespace Mysql {
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namespace Tools {
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namespace Base {
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/**
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Extracts the value of server variable.
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*/
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class Show_variable_query_extractor {
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public:
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/**
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Extract the value of server variable.
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@param[in] query_runner MySQL query runner to use.
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@param[in] variable Name of variable to get value of.
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@param[out] value reference to String to store variable value to.
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@param[out] exists reference to bool to store if variable was found.
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@return nonzero if error was encountered.
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*/
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static int64 get_variable_value(Mysql_query_runner *query_runner,
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std::string variable, std::string &value,
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bool &exists);
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private:
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Show_variable_query_extractor();
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/**
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Result row callback to be used in query runner.
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*/
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int64 extract_variable(const Mysql_query_runner::Row &result_row);
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/**
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Temporary placeholder for extracted value.
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*/
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std::string m_extracted_variable;
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/**
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Temporary placeholder for value received flag.
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*/
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bool m_exists;
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};
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} // namespace Base
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} // namespace Tools
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} // namespace Mysql
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#endif
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