Code_query_range.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_range_hpp
- #define ODBC_CODEGEN_Code_query_range_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;
- /*
- * Range scan via ordered index. We implement only the case of equality
- * on an initial sequence of index keys.
- */
- class Plan_query_range : public Plan_query {
- public:
- Plan_query_range(Plan_root* root);
- virtual ~Plan_query_range();
- Plan_base* analyze(Ctx& ctx, Ctl& ctl);
- Exec_base* codegen(Ctx& ctx, Ctl& ctl);
- void print(Ctx& ctx);
- void setTable(Plan_table* table, Plan_table::Index* index);
- void setInterp(Plan_pred* interp);
- void setExclusive();
- protected:
- Plan_table* m_table;
- Plan_table::Index* m_index;
- Plan_pred* m_interp;
- bool m_exclusive;
- };
- inline
- Plan_query_range::Plan_query_range(Plan_root* root) :
- Plan_query(root),
- m_table(0),
- m_index(0),
- m_interp(0),
- m_exclusive(false)
- {
- }
- inline void
- Plan_query_range::setTable(Plan_table* table, Plan_table::Index* index)
- {
- ctx_assert(table != 0 && index != 0 && index == &table->m_indexList[index->m_pos] && index->m_pos != 0);
- m_table = table;
- m_index = index;
- }
- inline void
- Plan_query_range::setInterp(Plan_pred* interp)
- {
- ctx_assert(interp != 0);
- m_interp = interp;
- }
- inline void
- Plan_query_range::setExclusive()
- {
- m_exclusive = true;
- }
- class Exec_query_range : public Exec_query {
- public:
- class Code : public Exec_query::Code {
- public:
- Code(unsigned keyCount, unsigned attrCount);
- virtual ~Code();
- protected:
- friend class Plan_query_range;
- friend class Exec_query_range;
- const char* m_tableName;
- const char* m_indexName;
- unsigned m_keyCount;
- SqlSpecs m_keySpecs; // key types
- NdbAttrId* m_keyId;
- Exec_expr** m_keyMatch; // XXX pointers for now
- unsigned m_attrCount;
- SqlSpecs m_sqlSpecs;
- NdbAttrId* m_attrId;
- bool m_exclusive;
- };
- class Data : public Exec_query::Data {
- public:
- Data(Exec_query_range* node, const SqlSpecs& sqlSpecs);
- virtual ~Data();
- protected:
- friend class Exec_query_range;
- SqlRow m_sqlRow;
- NdbConnection* m_con;
- NdbOperation* m_op;
- NdbRecAttr** m_recAttr;
- unsigned m_parallel;
- bool m_done; // if no match possible due to range
- };
- Exec_query_range(Exec_root* root);
- virtual ~Exec_query_range();
- 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);
- const Code& getCode() const;
- Data& getData() const;
- void setInterp(Exec_pred* interp);
- protected:
- Exec_pred* m_interp;
- };
- inline
- Exec_query_range::Code::Code(unsigned keyCount, unsigned attrCount) :
- Exec_query::Code(m_sqlSpecs),
- m_tableName(0),
- m_indexName(0),
- m_keyCount(keyCount),
- m_keySpecs(keyCount),
- m_keyId(0),
- m_attrCount(attrCount),
- m_sqlSpecs(attrCount),
- m_attrId(0),
- m_exclusive(false)
- {
- }
- inline
- Exec_query_range::Data::Data(Exec_query_range* 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),
- m_done(false)
- {
- }
- inline
- Exec_query_range::Exec_query_range(Exec_root* root) :
- Exec_query(root),
- m_interp(0)
- {
- }
- inline const Exec_query_range::Code&
- Exec_query_range::getCode() const
- {
- const Code* code = static_cast<const Code*>(m_code);
- return *code;
- }
- inline Exec_query_range::Data&
- Exec_query_range::getData() const
- {
- Data* data = static_cast<Data*>(m_data);
- return *data;
- }
- inline void
- Exec_query_range::setInterp(Exec_pred* interp)
- {
- ctx_assert(interp != 0);
- m_interp = interp;
- }
- #endif