CodeGen.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_CodeGen_hpp
- #define ODBC_CODEGEN_CodeGen_hpp
- #include <common/common.hpp>
- class StmtArea;
- class SqlField;
- class ExtField;
- /**
- * @class CodeGen
- * @brief Compiles SQL text into ExecTree::Code
- */
- class CodeGen {
- public:
- CodeGen(StmtArea& stmtArea);
- ~CodeGen();
- // parse and analyze SQL statement
- void prepare(Ctx& ctx);
- // these are passed to Executor
- void execute(Ctx& ctx);
- void fetch(Ctx& ctx);
- // close statement (mainly scan)
- void close(Ctx& ctx);
- // free data structures
- void free(Ctx& ctx);
- // odbc support
- void sqlGetData(Ctx& ctx, SQLUSMALLINT columnNumber, SQLSMALLINT targetType, SQLPOINTER targetValue, SQLINTEGER bufferLength, SQLINTEGER* strlen_or_Ind);
- void sqlParamData(Ctx& ctx, SQLPOINTER* value);
- void sqlPutData(Ctx& ctx, SQLPOINTER data, SQLINTEGER strlen_or_Ind);
- private:
- void parse(Ctx& ctx);
- void analyze(Ctx& ctx);
- void describe(Ctx& ctx);
- void codegen(Ctx& ctx);
- void alloc(Ctx& ctx);
- void freePlan(Ctx& ctx);
- void freeExec(Ctx& ctx);
- StmtArea& m_stmtArea;
- };
- inline
- CodeGen::CodeGen(StmtArea& stmtArea) :
- m_stmtArea(stmtArea)
- {
- }
- inline
- CodeGen::~CodeGen()
- {
- }
- #endif