Code_stmt.hpp
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上传日期:2022-05-23
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- /* Copyright (C) 2003 MySQL AB
- This program is free software; you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 2 of the License, or
- (at your option) any later version.
- 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 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */
- #ifndef ODBC_CODEGEN_Code_stmt_hpp
- #define ODBC_CODEGEN_Code_stmt_hpp
- #include <common/common.hpp>
- #include <common/DataType.hpp>
- #include "Code_base.hpp"
- class Ctx;
- /**
- * @class Plan_stmt
- * @brief Base class for statements in PlanTree
- *
- * A statement is a complete or partial SQL statement which can
- * be optimized into executable statements Exec_stmt.
- */
- class Plan_stmt : public Plan_base {
- public:
- Plan_stmt(Plan_root* root);
- virtual ~Plan_stmt() = 0;
- virtual void describe(Ctx& ctx);
- };
- inline
- Plan_stmt::Plan_stmt(Plan_root* root) :
- Plan_base(root)
- {
- }
- /**
- * @class Exec_stmt
- * @brief Base class for statements in ExecTree
- */
- class Exec_stmt : public Exec_base {
- public:
- class Code : public Exec_base::Code {
- public:
- virtual ~Code() = 0;
- };
- class Data : public Exec_base::Data {
- public:
- virtual ~Data() = 0;
- };
- Exec_stmt(Exec_root* root);
- virtual ~Exec_stmt() = 0;
- virtual void bind(Ctx& ctx);
- virtual void execute(Ctx& ctx, Ctl& ctl) = 0;
- protected:
- friend class Exec_root;
- bool m_topLevel;
- };
- inline
- Exec_stmt::Exec_stmt(Exec_root* root) :
- Exec_base(root),
- m_topLevel(false)
- {
- }
- #endif