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https://github.com/mariadb-corporation/mariadb-columnstore-engine.git
synced 2025-04-29 21:36:45 +03:00
1a849c88e8
We have added a new function, SystemCatalog::upgrade(), which will create a new column in the database and fill it with default values. It uses a reference column to fill the column, which is passed as a std::unordered_map<key, value> value to SystemCatalog::upgrade() function, where key is the target column which needs to be created. In addition, we pass additional std::unordered_map's to SystemCatalog::upgrade() containing information such as the datatypes and colwidths of the target and reference columns, as well as the default value which will be used to fill the target column.
43 lines
1.2 KiB
C++
43 lines
1.2 KiB
C++
/* Copyright (C) 2014 InfiniDB, Inc.
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License
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as published by the Free Software Foundation; version 2 of
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the License.
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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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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 Street, Fifth Floor, Boston,
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MA 02110-1301, USA. */
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// $Id: systemcatalog.h 2101 2013-01-21 14:12:52Z rdempsey $
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/**
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* @file
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*/
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#pragma once
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#include "writeengine.h"
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#include <unordered_map>
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#include <utility>
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using OidTypeT = std::pair<execplan::CalpontSystemCatalog::ColDataType, int>;
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class SystemCatalog
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{
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public:
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void build();
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void remove();
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int upgrade(const std::unordered_map<int, std::pair<int, bool>>&,
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std::unordered_map<int, OidTypeT>,
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std::unordered_map<int, std::string>);
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private:
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WriteEngine::WriteEngineWrapper fWriteEngine;
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};
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