mirror of
https://github.com/mariadb-corporation/mariadb-columnstore-engine.git
synced 2025-04-18 21:44:02 +03:00
114 lines
3.6 KiB
C++
114 lines
3.6 KiB
C++
/* Copyright (C) 2014 InfiniDB, Inc.
|
|
|
|
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; version 2 of
|
|
the License.
|
|
|
|
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., 51 Franklin Street, Fifth Floor, Boston,
|
|
MA 02110-1301, USA. */
|
|
|
|
/****************************************************************************
|
|
* $Id: funcexp.h 3495 2013-01-21 14:09:51Z rdempsey $
|
|
*
|
|
*
|
|
****************************************************************************/
|
|
/** @file */
|
|
|
|
#pragma once
|
|
|
|
#include <string>
|
|
#include <vector>
|
|
#include <tr1/unordered_map>
|
|
#include <boost/thread/mutex.hpp>
|
|
|
|
#include "rowgroup.h"
|
|
#include "returnedcolumn.h"
|
|
#include "parsetree.h"
|
|
|
|
namespace execplan
|
|
{
|
|
class FunctionColumn;
|
|
class ArithmeticColumn;
|
|
} // namespace execplan
|
|
|
|
namespace funcexp
|
|
{
|
|
class Func;
|
|
|
|
typedef std::tr1::unordered_map<std::string, Func*> FuncMap;
|
|
|
|
/** @brief FuncExp is a component for evaluate function and expression filters
|
|
*/
|
|
class FuncExp
|
|
{
|
|
public:
|
|
/** Singleton pattern */
|
|
static FuncExp* instance();
|
|
|
|
/********************************************************************
|
|
* Row based evaluation APIs
|
|
********************************************************************/
|
|
|
|
/** @brief evaluate a filter stack on row. used for F&E on the where clause
|
|
*
|
|
* @param row input row that contains all the columns in the filter stack
|
|
* @param filters parsetree of filters to evaluate
|
|
* @return boolean of whether or not the row passed evaluation
|
|
*/
|
|
inline bool evaluate(rowgroup::Row& row, execplan::ParseTree* filters);
|
|
|
|
/** @brief evaluate a filter stack on rowgroup
|
|
*
|
|
* @param row input rowgroup that contains all the columns in the filter stack
|
|
* @param filters parse tree of filters to evaluate. The failed rows are removed from the rowgroup
|
|
*/
|
|
inline void evaluate(rowgroup::RowGroup& rowgroup, execplan::ParseTree* filters);
|
|
|
|
/** @brief evaluate a F&E column on row. used for F&E on the select and group by clause
|
|
*
|
|
* @param row input row that contains all the columns in all the expressions
|
|
* @param expressions vector of F&Es that needs evaluation. The results are filled on the row.
|
|
*/
|
|
void evaluate(rowgroup::Row& row, std::vector<execplan::SRCP>& expressions);
|
|
|
|
/** @brief evaluate a F&E column on rowgroup. used for F&E on the select and group by clause
|
|
*
|
|
* @param row input rowgroup that contains all the columns in all the expressions
|
|
* @param expressions vector of F&Es that needs evaluation. The results are filled on each row.
|
|
*/
|
|
inline void evaluate(rowgroup::RowGroup& rowgroup, std::vector<execplan::SRCP>& expressions);
|
|
|
|
/** @brief get functor from functor map
|
|
*
|
|
* @param funcName function name
|
|
* @return functor pointer. If non-support function, return NULL
|
|
*/
|
|
Func* getFunctor(std::string& funcName);
|
|
|
|
private:
|
|
static FuncExp* fInstance;
|
|
static boost::mutex fInstanceMutex;
|
|
FuncMap fFuncMap;
|
|
FuncExp();
|
|
};
|
|
|
|
inline bool FuncExp::evaluate(rowgroup::Row& row, execplan::ParseTree* filters)
|
|
{
|
|
bool isNull = false;
|
|
return (filters->getBoolVal(row, isNull));
|
|
}
|
|
|
|
inline void FuncExp::evaluate(rowgroup::RowGroup& rowgroup, execplan::ParseTree* filters)
|
|
{
|
|
}
|
|
|
|
} // namespace funcexp
|