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Code_query_repeat.hpp
上传用户:romrleung
上传日期:2022-05-23
资源大小:18897k
文件大小:3k
源码类别:
MySQL数据库
开发平台:
Visual C++
- /* 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_query_repeat_hpp
- #define ODBC_CODEGEN_Code_query_repeat_hpp
- #include <common/common.hpp>
- #include "Code_query.hpp"
- #include "Code_expr_row.hpp"
- /**
- * @class Plan_query_repeat
- * @brief Constant query node in PlanTree
- */
- class Plan_query_repeat : public Plan_query {
- public:
- Plan_query_repeat(Plan_root* root);
- Plan_query_repeat(Plan_root* root, CountType maxcount);
- virtual ~Plan_query_repeat();
- Plan_base* analyze(Ctx& ctx, Ctl& ctl);
- Exec_base* codegen(Ctx& ctx, Ctl& ctl);
- void print(Ctx& ctx);
- private:
- bool m_forever;
- CountType m_maxcount;
- };
- inline
- Plan_query_repeat::Plan_query_repeat(Plan_root* root) :
- Plan_query(root),
- m_forever(true),
- m_maxcount(0)
- {
- }
- inline
- Plan_query_repeat::Plan_query_repeat(Plan_root* root, CountType maxcount) :
- Plan_query(root),
- m_forever(false),
- m_maxcount(maxcount)
- {
- }
- /**
- * @class Exec_query_repeat
- * @brief Constant query node in ExecTree
- */
- class Exec_query_repeat : public Exec_query {
- public:
- class Code : public Exec_query::Code {
- public:
- Code(const SqlSpecs& sqlSpecs, bool forever, CountType maxcount);
- virtual ~Code();
- protected:
- friend class Exec_query_repeat;
- SqlSpecs m_sqlSpecs;
- bool m_forever;
- CountType m_maxcount;
- };
- class Data : public Exec_query::Data {
- public:
- Data(Exec_query_repeat* node, const SqlSpecs& sqlSpecs);
- virtual ~Data();
- protected:
- friend class Exec_query_repeat;
- SqlRow m_sqlRow;
- CountType m_count;
- };
- Exec_query_repeat(Exec_root* root);
- virtual ~Exec_query_repeat();
- void alloc(Ctx& ctx, Ctl& ctl);
- void execImpl(Ctx& ctx, Ctl& ctl);
- bool fetchImpl(Ctx& ctx, Ctl& ctl);
- void close(Ctx& ctx);
- void print(Ctx& ctx);
- // children
- const Code& getCode() const;
- Data& getData() const;
- };
- inline
- Exec_query_repeat::Code::Code(const SqlSpecs& sqlSpecs, bool forever, CountType maxcount) :
- Exec_query::Code(m_sqlSpecs),
- m_sqlSpecs(sqlSpecs),
- m_forever(forever),
- m_maxcount(maxcount)
- {
- }
- inline
- Exec_query_repeat::Data::Data(Exec_query_repeat* node, const SqlSpecs& sqlSpecs) :
- Exec_query::Data(node, m_sqlRow),
- m_sqlRow(sqlSpecs),
- m_count(0)
- {
- }
- inline
- Exec_query_repeat::Exec_query_repeat(Exec_root* root) :
- Exec_query(root)
- {
- }
- // children
- inline const Exec_query_repeat::Code&
- Exec_query_repeat::getCode() const
- {
- const Code* code = static_cast<const Code*>(m_code);
- return *code;
- }
- inline Exec_query_repeat::Data&
- Exec_query_repeat::getData() const
- {
- Data* data = static_cast<Data*>(m_data);
- return *data;
- }
- #endif