StmtArea.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_COMMON_StmtArea_hpp
- #define ODBC_COMMON_StmtArea_hpp
- #include <common/common.hpp>
- #include "ConnArea.hpp"
- #include "StmtInfo.hpp"
- #include "DescArea.hpp"
- class PlanTree;
- class ExecTree;
- /**
- * @class StmtArea
- * @brief Public part of statement handle
- */
- class StmtArea {
- public:
- // state between ODBC function calls
- enum State {
- Free = 1, // not in use
- Prepared = 2, // statement prepared, maybe unbound
- NeedData = 3, // executed, SQLParamData expected
- Open = 4 // cursor open
- };
- // connection area shared by all statements
- ConnArea& connArea();
- State getState() const;
- // SQL text
- const BaseString& sqlText();
- BaseString& nativeText();
- // allocate or unallocate connections if necessary
- bool useSchemaCon(Ctx& ctx, bool use);
- bool useConnection(Ctx& ctx, bool use);
- // statement info
- StmtInfo& stmtInfo();
- DescArea& descArea(DescUsage u);
- unsigned unbound() const;
- // set row count here and in diagnostics
- void setRowCount(Ctx& ctx, CountType rowCount);
- CountType getRowCount() const;
- // raw tuple count (tuples fetched from NDB)
- void resetTuplesFetched();
- void incTuplesFetched();
- CountType getTuplesFetched() const;
- // set dynamic function in StmtInfo only (at prepare)
- void setFunction(Ctx& ctx, const char* function, SQLINTEGER functionCode);
- // set dynamic function in diagnostics (at execute)
- void setFunction(Ctx& ctx);
- protected:
- friend class CodeGen;
- friend class Executor;
- friend class Plan_root;
- StmtArea(ConnArea& connArea);
- ~StmtArea();
- void free(Ctx& ctx);
- ConnArea& m_connArea;
- State m_state;
- BaseString m_sqlText;
- BaseString m_nativeText;
- bool m_useSchemaCon;
- bool m_useConnection;
- StmtInfo m_stmtInfo;
- // plan tree output from parser and rewritten by analyze
- PlanTree* m_planTree;
- // exec tree output from analyze
- ExecTree* m_execTree;
- // pointers within HandleDesc allocated via HandleStmt
- DescArea* m_descArea[1+4];
- // parameters with unbound SQL type
- unsigned m_unbound;
- CountType m_rowCount;
- CountType m_tuplesFetched;
- };
- inline ConnArea&
- StmtArea::connArea()
- {
- return m_connArea;
- }
- inline StmtArea::State
- StmtArea::getState() const
- {
- return m_state;
- }
- inline const BaseString&
- StmtArea::sqlText() {
- return m_sqlText;
- }
- inline BaseString&
- StmtArea::nativeText() {
- return m_nativeText;
- }
- inline StmtInfo&
- StmtArea::stmtInfo()
- {
- return m_stmtInfo;
- }
- inline DescArea&
- StmtArea::descArea(DescUsage u)
- {
- ctx_assert(1 <= u && u <= 4);
- ctx_assert(m_descArea[u] != 0);
- return *m_descArea[u];
- }
- inline unsigned
- StmtArea::unbound() const
- {
- return m_unbound;
- }
- inline CountType
- StmtArea::getRowCount() const
- {
- return m_rowCount;
- }
- inline void
- StmtArea::resetTuplesFetched()
- {
- m_tuplesFetched = 0;
- }
- inline void
- StmtArea::incTuplesFetched()
- {
- m_tuplesFetched++;
- }
- inline CountType
- StmtArea::getTuplesFetched() const
- {
- return m_tuplesFetched;
- }
- #endif