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Code_query_scan.hpp
上传用户:romrleung
上传日期:2022-05-23
资源大小:18897k
文件大小:4k
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_scan_hpp
- #define ODBC_CODEGEN_Code_query_scan_hpp
- #include <common/common.hpp>
- #include "Code_query.hpp"
- #include "Code_table.hpp"
- #include "Code_pred.hpp"
- class Ctx;
- class StmtArea;
- class NdbConnection;
- class NdbOperation;
- class NdbRecAttr;
- /*
- * Table scan.
- */
- class Plan_query_scan : public Plan_query {
- public:
- Plan_query_scan(Plan_root* root);
- virtual ~Plan_query_scan();
- Plan_base* analyze(Ctx& ctx, Ctl& ctl);
- Exec_base* codegen(Ctx& ctx, Ctl& ctl);
- void print(Ctx& ctx);
- void setTable(Plan_table* table);
- void setInterp(Plan_pred* interp);
- void setExclusive();
- protected:
- Plan_table* m_table;
- Plan_pred* m_interp;
- bool m_exclusive; // exclusive
- };
- inline
- Plan_query_scan::Plan_query_scan(Plan_root* root) :
- Plan_query(root),
- m_table(0),
- m_interp(0),
- m_exclusive(false)
- {
- }
- inline void
- Plan_query_scan::setTable(Plan_table* table)
- {
- ctx_assert(table != 0);
- m_table = table;
- }
- inline void
- Plan_query_scan::setInterp(Plan_pred* interp)
- {
- ctx_assert(interp != 0);
- m_interp = interp;
- }
- inline void
- Plan_query_scan::setExclusive()
- {
- m_exclusive = true;
- }
- class Exec_query_scan : public Exec_query {
- public:
- class Code : public Exec_query::Code {
- public:
- Code(unsigned attrCount);
- virtual ~Code();
- protected:
- friend class Plan_query_scan;
- friend class Exec_query_scan;
- char* m_tableName;
- unsigned m_attrCount;
- SqlSpecs m_sqlSpecs;
- NdbAttrId* m_attrId;
- bool m_exclusive;
- };
- class Data : public Exec_query::Data {
- public:
- Data(Exec_query_scan* node, const SqlSpecs& sqlSpecs);
- virtual ~Data();
- protected:
- friend class Exec_query_scan;
- SqlRow m_sqlRow;
- NdbConnection* m_con;
- NdbOperation* m_op;
- NdbRecAttr** m_recAttr;
- unsigned m_parallel; // parallelism could be runtime option
- };
- Exec_query_scan(Exec_root* root);
- virtual ~Exec_query_scan();
- 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;
- void setInterp(Exec_pred* interp);
- protected:
- Exec_pred* m_interp;
- };
- inline
- Exec_query_scan::Code::Code(unsigned attrCount) :
- Exec_query::Code(m_sqlSpecs),
- m_tableName(0),
- m_attrCount(attrCount),
- m_sqlSpecs(attrCount),
- m_attrId(0),
- m_exclusive(false)
- {
- }
- inline
- Exec_query_scan::Data::Data(Exec_query_scan* node, const SqlSpecs& sqlSpecs) :
- Exec_query::Data(node, m_sqlRow),
- m_sqlRow(sqlSpecs),
- m_con(0),
- m_op(0),
- m_recAttr(0),
- m_parallel(1)
- {
- }
- inline
- Exec_query_scan::Exec_query_scan(Exec_root* root) :
- Exec_query(root),
- m_interp(0)
- {
- }
- // children
- inline const Exec_query_scan::Code&
- Exec_query_scan::getCode() const
- {
- const Code* code = static_cast<const Code*>(m_code);
- return *code;
- }
- inline Exec_query_scan::Data&
- Exec_query_scan::getData() const
- {
- Data* data = static_cast<Data*>(m_data);
- return *data;
- }
- inline void
- Exec_query_scan::setInterp(Exec_pred* interp)
- {
- ctx_assert(interp != 0);
- m_interp = interp;
- }
- #endif