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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_Code_expr_param_hpp
#define ODBC_CODEGEN_Code_expr_param_hpp
#include <common/common.hpp>
#include <common/DataField.hpp>
#include "Code_expr.hpp"
/**
* @class Plan_expr_param
* @brief Constant expression value in PlanTree
*/
class Plan_expr_param : public Plan_expr {
public:
Plan_expr_param(Plan_root* root, unsigned paramNumber);
virtual ~Plan_expr_param();
Plan_base* analyze(Ctx& ctx, Ctl& ctl);
void describe(Ctx& ctx);
Exec_base* codegen(Ctx& ctx, Ctl& ctl);
void print(Ctx& ctx);
bool isEqual(const Plan_expr* expr) const;
bool isGroupBy(const Plan_expr_row* row) const;
protected:
const unsigned m_paramNumber;
};
inline
Plan_expr_param::Plan_expr_param(Plan_root* root, unsigned paramNumber) :
Plan_expr(root, TypeParam),
m_paramNumber(paramNumber)
{
}
/**
* @class Exec_expr_param
* @brief Constant expression value in ExecTree
*/
class Exec_expr_param : public Exec_expr {
public:
class Code : public Exec_expr::Code {
public:
Code(const SqlSpec& sqlSpec, unsigned paramNumber);
virtual ~Code();
protected:
friend class Plan_expr_param;
friend class Exec_expr_param;
const SqlSpec m_sqlSpec;
const unsigned m_paramNumber;
};
class Data : public Exec_expr::Data {
public:
Data(SqlField& sqlField);
virtual ~Data();
ExtField* extField() const;
protected:
friend class Exec_expr_param;
friend class Exec_root;
SqlField m_sqlField;
ExtField* m_extField; // input binding
bool m_atExec; // data at exec
int m_extPos; // position for SQLPutData (-1 before first call)
};
Exec_expr_param(Exec_root* root);
virtual ~Exec_expr_param();
void alloc(Ctx& ctx, Ctl& ctl);
void bind(Ctx& ctx);
void evaluate(Ctx& ctx, Ctl& ctl);
void close(Ctx& ctx);
void print(Ctx& ctx);
// children
const Code& getCode() const;
Data& getData() const;
};
inline
Exec_expr_param::Code::Code(const SqlSpec& sqlSpec, unsigned paramNumber) :
Exec_expr::Code(m_sqlSpec),
m_sqlSpec(sqlSpec),
m_paramNumber(paramNumber)
{
}
inline
Exec_expr_param::Data::Data(SqlField& sqlField) :
Exec_expr::Data(m_sqlField),
m_sqlField(sqlField),
m_extField(0),
m_atExec(false),
m_extPos(-1)
{
}
inline ExtField*
Exec_expr_param::Data::extField() const
{
return m_extField;
}
inline
Exec_expr_param::Exec_expr_param(Exec_root* root) :
Exec_expr(root)
{
}
// children
inline const Exec_expr_param::Code&
Exec_expr_param::getCode() const
{
const Code* code = static_cast<const Code*>(m_code);
return *code;
}
inline Exec_expr_param::Data&
Exec_expr_param::getData() const
{
Data* data = static_cast<Data*>(m_data);
return *data;
}
#endif
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