mirror of
https://github.com/mariadb-corporation/mariadb-columnstore-engine.git
synced 2025-06-09 06:41:19 +03:00
273 lines
8.4 KiB
C++
273 lines
8.4 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: functioncolumn.h 9679 2013-07-11 22:32:03Z zzhu $
|
|
*
|
|
*
|
|
***********************************************************************/
|
|
/** @file */
|
|
|
|
#ifndef FUNCTIONCOLUMN_H
|
|
#define FUNCTIONCOLUMN_H
|
|
#include <string>
|
|
#include <iosfwd>
|
|
#include <vector>
|
|
|
|
#include "returnedcolumn.h"
|
|
#include "functor.h"
|
|
|
|
namespace messageqcpp
|
|
{
|
|
class ByteStream;
|
|
}
|
|
|
|
/**
|
|
* Namespace
|
|
*/
|
|
namespace execplan
|
|
{
|
|
|
|
/**
|
|
* @brief A class to represent a functional column
|
|
*
|
|
* This class is a specialization of class ReturnedColumn that
|
|
* handles a functional column like "extract(...)" and "substr(...)"
|
|
*/
|
|
class FunctionColumn : public ReturnedColumn
|
|
{
|
|
|
|
public:
|
|
FunctionColumn();
|
|
FunctionColumn(std::string& funcName);
|
|
FunctionColumn(const std::string& functionName, const std::string& funcParmsInString, const uint32_t sessionID = 0);
|
|
FunctionColumn( const FunctionColumn& rhs, const uint32_t sessionID = 0);
|
|
virtual ~FunctionColumn();
|
|
|
|
/** get function name
|
|
*
|
|
* get the function name for this function column
|
|
*/
|
|
inline const std::string& functionName() const
|
|
{
|
|
return fFunctionName;
|
|
}
|
|
|
|
/** set function name
|
|
*
|
|
* set the function name for this function column
|
|
*/
|
|
inline void functionName(const std::string functionName)
|
|
{
|
|
fFunctionName = functionName;
|
|
}
|
|
|
|
/** get function parameters
|
|
*
|
|
* get the function parameters for this function column.
|
|
* @return a vector of paramenters in string format
|
|
*/
|
|
inline const funcexp::FunctionParm& functionParms() const
|
|
{
|
|
return fFunctionParms;
|
|
}
|
|
|
|
/** set function parameters
|
|
*
|
|
* set the function parameters for this function column.
|
|
*/
|
|
void functionParms(const funcexp::FunctionParm& functionParms)
|
|
{
|
|
fFunctionParms = functionParms;
|
|
}
|
|
|
|
/** set function parameters
|
|
*
|
|
* set the function parameters for this function column.
|
|
* pass in the functionParms with parenthesis as one string.
|
|
* tokenize the string with ' ' or ',' and form a vector of
|
|
* parameters in string.
|
|
*/
|
|
void funcParms(const std::string& funcParmsInString);
|
|
|
|
/** get table alias name
|
|
*
|
|
* get the table alias name for this function
|
|
*/
|
|
inline const std::string& tableAlias () const
|
|
{
|
|
return fTableAlias;
|
|
}
|
|
|
|
/** set table alias name
|
|
*
|
|
* set the table alias name for this function
|
|
*/
|
|
inline void tableAlias (const std::string& tableAlias)
|
|
{
|
|
fTableAlias = tableAlias;
|
|
}
|
|
|
|
virtual const std::string data() const;
|
|
virtual void data(const std::string data)
|
|
{
|
|
fData = data;
|
|
}
|
|
|
|
virtual const std::string toString() const;
|
|
|
|
/** return a copy of this pointer
|
|
*
|
|
* deep copy of this pointer and return the copy
|
|
*/
|
|
inline virtual FunctionColumn* clone() const
|
|
{
|
|
return new FunctionColumn (*this);
|
|
}
|
|
|
|
/**
|
|
* The serialization interface
|
|
*/
|
|
virtual void serialize(messageqcpp::ByteStream&) const;
|
|
virtual void unserialize(messageqcpp::ByteStream&);
|
|
|
|
virtual bool hasAggregate();
|
|
virtual bool hasWindowFunc();
|
|
virtual void setDerivedTable();
|
|
virtual void replaceRealCol(std::vector<SRCP>&);
|
|
virtual const std::vector<SimpleColumn*>& simpleColumnList() const
|
|
{
|
|
return fSimpleColumnList;
|
|
}
|
|
|
|
virtual void setSimpleColumnList();
|
|
/**
|
|
* Return the tableAlias name of the table that the column arguments belong to.
|
|
*
|
|
* @param TableAliasName that will be set in the function
|
|
* @return true, if all arguments belong to one table
|
|
* false, if multiple tables are involved in the function
|
|
*/
|
|
virtual bool singleTable(CalpontSystemCatalog::TableAliasName& tan);
|
|
|
|
private:
|
|
/**
|
|
* Fields
|
|
*/
|
|
std::string fFunctionName; /// function name
|
|
std::string fTableAlias; /// table alias which has the column
|
|
std::string fData; /// SQL representation
|
|
|
|
/** @brief Do a deep, strict (as opposed to semantic) equivalence test
|
|
*
|
|
* Do a deep, strict (as opposed to semantic) equivalence test.
|
|
* @return true iff every member of t is a duplicate copy of every member of this; false otherwise
|
|
*/
|
|
virtual bool operator==(const TreeNode* t) const;
|
|
|
|
/** @brief Do a deep, strict (as opposed to semantic) equivalence test
|
|
*
|
|
* Do a deep, strict (as opposed to semantic) equivalence test.
|
|
* @return true iff every member of t is a duplicate copy of every member of this; false otherwise
|
|
*/
|
|
bool operator==(const FunctionColumn& t) const;
|
|
|
|
/** @brief Do a deep, strict (as opposed to semantic) equivalence test
|
|
*
|
|
* Do a deep, strict (as opposed to semantic) equivalence test.
|
|
* @return false iff every member of t is a duplicate copy of every member of this; true otherwise
|
|
*/
|
|
virtual bool operator!=(const TreeNode* t) const;
|
|
|
|
/** @brief Do a deep, strict (as opposed to semantic) equivalence test
|
|
*
|
|
* Do a deep, strict (as opposed to semantic) equivalence test.
|
|
* @return false iff every member of t is a duplicate copy of every member of this; true otherwise
|
|
*/
|
|
bool operator!=(const FunctionColumn& t) const;
|
|
|
|
/***********************************************************
|
|
* F&E framework *
|
|
***********************************************************/
|
|
public:
|
|
virtual const std::string& getStrVal(rowgroup::Row& row, bool& isNull)
|
|
{
|
|
fResult.strVal = fFunctor->getStrVal(row, fFunctionParms, isNull, fOperationType);
|
|
return fResult.strVal;
|
|
}
|
|
virtual int64_t getIntVal(rowgroup::Row& row, bool& isNull)
|
|
{
|
|
return fFunctor->getIntVal(row, fFunctionParms, isNull, fOperationType);
|
|
}
|
|
virtual uint64_t getUintVal(rowgroup::Row& row, bool& isNull)
|
|
{
|
|
return fFunctor->getUintVal(row, fFunctionParms, isNull, fOperationType);
|
|
}
|
|
virtual float getFloatVal(rowgroup::Row& row, bool& isNull)
|
|
{
|
|
return fFunctor->getFloatVal(row, fFunctionParms, isNull, fOperationType);
|
|
}
|
|
virtual double getDoubleVal(rowgroup::Row& row, bool& isNull)
|
|
{
|
|
return fFunctor->getDoubleVal(row, fFunctionParms, isNull, fOperationType);
|
|
}
|
|
virtual IDB_Decimal getDecimalVal(rowgroup::Row& row, bool& isNull)
|
|
{
|
|
IDB_Decimal decimal = fFunctor->getDecimalVal(row, fFunctionParms, isNull, fOperationType);
|
|
|
|
if (fResultType.scale == decimal.scale)
|
|
return decimal;
|
|
|
|
if (fResultType.scale > decimal.scale)
|
|
decimal.value *= IDB_pow[fResultType.scale - decimal.scale];
|
|
else
|
|
decimal.value = (int64_t)(decimal.value > 0 ?
|
|
(double)decimal.value / IDB_pow[decimal.scale - fResultType.scale] + 0.5 :
|
|
(double)decimal.value / IDB_pow[decimal.scale - fResultType.scale] - 0.5);
|
|
|
|
decimal.scale = fResultType.scale;
|
|
decimal.precision = fResultType.precision;
|
|
return decimal;
|
|
}
|
|
virtual bool getBoolVal(rowgroup::Row& row, bool& isNull)
|
|
{
|
|
return fFunctor->getBoolVal(row, fFunctionParms, isNull, fOperationType);
|
|
}
|
|
virtual int32_t getDateIntVal(rowgroup::Row& row, bool& isNull)
|
|
{
|
|
return fFunctor->getDateIntVal(row, fFunctionParms, isNull, fOperationType);
|
|
}
|
|
virtual int64_t getDatetimeIntVal(rowgroup::Row& row, bool& isNull)
|
|
{
|
|
return fFunctor->getDatetimeIntVal(row, fFunctionParms, isNull, fOperationType);
|
|
}
|
|
|
|
|
|
private:
|
|
funcexp::FunctionParm fFunctionParms;
|
|
funcexp::Func* fFunctor; /// functor to execute this function
|
|
};
|
|
|
|
/**
|
|
* ostream operator
|
|
*/
|
|
std::ostream& operator<<(std::ostream& output, const FunctionColumn& rhs);
|
|
|
|
}
|
|
#endif //FUNCTIONCOLUMN_H
|
|
|