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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_query_hpp
#define ODBC_CODEGEN_Code_query_hpp
#include <common/common.hpp>
#include <common/DataRow.hpp>
#include <common/ResultArea.hpp>
#include "Code_stmt.hpp"
class Plan_expr_row;
class Plan_table;
class Exec_expr_row;
/**
* @class Plan_query
* @brief Base class for queries in PlanTree
*/
class Plan_query : public Plan_stmt {
public:
Plan_query(Plan_root* root);
virtual ~Plan_query() = 0;
void describe(Ctx& ctx);
virtual Plan_expr_row* getRow();
};
inline
Plan_query::Plan_query(Plan_root* root) :
Plan_stmt(root)
{
}
/**
* @class Exec_query
* @brief Base class for executable queries.
*
* Executable queriable statement.
*/
class Exec_query : public Exec_stmt {
public:
class Code : public Exec_stmt::Code {
public:
Code(const SqlSpecs& sqlSpecs);
virtual ~Code() = 0;
const SqlSpecs& sqlSpecs() const;
protected:
friend class Exec_query;
const SqlSpecs& m_sqlSpecs; // subclass must contain
};
class Data : public Exec_stmt::Data, public ResultSet {
public:
Data(Exec_query* node, const SqlRow& sqlRow);
virtual ~Data() = 0;
const SqlRow& sqlRow() const;
ExtRow* extRow() const;
bool fetchImpl(Ctx& ctx, Ctl& ctl);
protected:
friend class Exec_query;
Exec_query* const m_node;
ExtRow* m_extRow; // output bindings
int* m_extPos; // positions for SQLGetData
};
Exec_query(Exec_root* root);
virtual ~Exec_query() = 0;
void bind(Ctx& ctx);
void execute(Ctx& ctx, Ctl& ctl);
bool fetch(Ctx& ctx, Ctl& ctl);
// children
const Code& getCode() const;
Data& getData() const;
virtual const Exec_query* getRawQuery() const;
// odbc support
void sqlGetData(Ctx& ctx, SQLUSMALLINT columnNumber, SQLSMALLINT targetType, SQLPOINTER targetValue, SQLINTEGER bufferLength, SQLINTEGER* strlen_or_Ind);
protected:
friend class Data;
virtual void execImpl(Ctx& ctx, Ctl& ctl) = 0;
virtual bool fetchImpl(Ctx& ctx, Ctl& ctl) = 0;
};
inline
Exec_query::Code::Code(const SqlSpecs& sqlSpecs) :
m_sqlSpecs(sqlSpecs)
{
}
inline const SqlSpecs&
Exec_query::Code::sqlSpecs() const
{
return m_sqlSpecs;
}
inline
Exec_query::Data::Data(Exec_query* node, const SqlRow& sqlRow) :
ResultSet(sqlRow),
m_node(node),
m_extRow(0),
m_extPos(0)
{
}
inline const SqlRow&
Exec_query::Data::sqlRow() const
{
return static_cast<const SqlRow&>(m_dataRow);
}
inline ExtRow*
Exec_query::Data::extRow() const
{
return m_extRow;
}
inline bool
Exec_query::Data::fetchImpl(Ctx& ctx, Ctl& ctl)
{
return m_node->fetchImpl(ctx, ctl);
}
inline
Exec_query::Exec_query(Exec_root* root) :
Exec_stmt(root)
{
}
// children
inline const Exec_query::Code&
Exec_query::getCode() const
{
const Code* code = static_cast<const Code*>(m_code);
return *code;
}
inline Exec_query::Data&
Exec_query::getData() const
{
Data* data = static_cast<Data*>(m_data);
return *data;
}
#endif
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