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1475.1.1
by Padraig O'Sullivan
Added interface and various implementations to abstract out the concept of an access method. Also added a factory class for creating an instance of an access method. |
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/* -*- mode: c++; c-basic-offset: 2; indent-tabs-mode: nil; -*-
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* vim:expandtab:shiftwidth=2:tabstop=2:smarttab:
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*
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* Copyright (C) 2010 Padraig O'Sullivan
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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; either version 2 of the License, or
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* (at your option) any later version.
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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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*/
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#ifndef DRIZZLED_OPTIMIZER_ACCESS_METHOD_H
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#define DRIZZLED_OPTIMIZER_ACCESS_METHOD_H
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#include "drizzled/definitions.h" |
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#include "drizzled/error.h" |
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#include "drizzled/sql_parse.h" |
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#include "drizzled/sql_base.h" |
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#include "drizzled/show.h" |
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1475.1.2
by Padraig O'Sullivan
Fixed various compiler errors in access method classes due to forgetting includes. |
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namespace drizzled |
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{
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1475.1.1
by Padraig O'Sullivan
Added interface and various implementations to abstract out the concept of an access method. Also added a factory class for creating an instance of an access method. |
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/* Forward declarations */
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class Table; |
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class JoinTable; |
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namespace optimizer |
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{
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/**
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* @class AccessMethod
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* @brief Represents an access method
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*/
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class AccessMethod |
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{
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public: |
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AccessMethod() {} |
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virtual ~AccessMethod() {} |
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/**
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* Retrieve statistics relelvant to this access method.
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*
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* @param[in] table
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* @param[in] join_tab
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* @return true on failure; false on success
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*/
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virtual bool getStats(Table *table, |
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JoinTable *join_tab)= 0; |
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};
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} /* end namespace optimizer */ |
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} /* end namespace drizzled */ |
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#endif /* DRIZZLED_OPTIMIZER_ACCESS_METHOD_H */ |