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deba5d2a1036d6237da2ebd1ab3c4b2889a3982f
mariadb-columnstore-engine/utils/udfsdk/udfsdk.cpp
Andrew Hutchings 3c1ebd8b94 MCOL-392 Add initial TIME datatype support
2018-04-30 09:42:41 +01:00

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/* Copyright (C) 2014 InfiniDB, Inc.
Copyright (C) 2016 MariaDB Corporaton
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. */
/***********************************************************************
* $Id$
*
*
***********************************************************************/
//#include <my_config.h>
#include <cmath>
#include <iostream>
using namespace std;
#include "udfsdk.h"
#include "treenode.h"
using namespace execplan;
#include "rowgroup.h"
using namespace rowgroup;
#include "funcexp.h"
using namespace funcexp;
namespace udfsdk
{
/**
* UDFSDK definition
*/
UDFSDK::UDFSDK()
{
}
UDFSDK::~UDFSDK()
{
}
/**
* All UDF functions should be registered in the function map. They will be
* picked up by the MariaDB ColumnStore F&E framework when the servers are started.
* That will make sure the UDF functions runs distributedly in ColumnStore
* engines just like the internal ColumnStore functions.
*/
FuncMap UDFSDK::UDFMap() const
{
FuncMap fm;
// first: function name
// second: Function pointer
// please use lower case for the function name. Because the names might be
// case-insensitive in MariaDB depending on the setting. In such case,
// the function names passed to the interface is always in lower case.
fm["mcs_add"] = new MCS_add();
fm["mcs_isnull"] = new MCS_isnull();
return fm;
}
/***************************************************************************
* MCS_ADD implementation
*
* OperationType() definition
*/
CalpontSystemCatalog::ColType MCS_add::operationType (FunctionParm& fp,
CalpontSystemCatalog::ColType& resultType)
{
// operation type of MCS_add is determined by the argument types
assert (fp.size() == 2);
CalpontSystemCatalog::ColType rt;
if (fp[0]->data()->resultType() == fp[1]->data()->resultType())
{
rt = fp[0]->data()->resultType();
}
else if (fp[0]->data()->resultType().colDataType == CalpontSystemCatalog::CHAR ||
fp[1]->data()->resultType().colDataType == CalpontSystemCatalog::CHAR ||
fp[0]->data()->resultType().colDataType == CalpontSystemCatalog::VARCHAR ||
fp[1]->data()->resultType().colDataType == CalpontSystemCatalog::VARCHAR ||
fp[0]->data()->resultType().colDataType == CalpontSystemCatalog::DOUBLE ||
fp[1]->data()->resultType().colDataType == CalpontSystemCatalog::DOUBLE)
{
rt.colDataType = CalpontSystemCatalog::DOUBLE;
rt.colWidth = 8;
}
else if (fp[0]->data()->resultType().colDataType == CalpontSystemCatalog::DATE ||
fp[1]->data()->resultType().colDataType == CalpontSystemCatalog::DATE ||
fp[0]->data()->resultType().colDataType == CalpontSystemCatalog::DATETIME ||
fp[1]->data()->resultType().colDataType == CalpontSystemCatalog::DATETIME ||
fp[0]->data()->resultType().colDataType == CalpontSystemCatalog::TIME ||
fp[1]->data()->resultType().colDataType == CalpontSystemCatalog::TIME)
{
rt.colDataType = CalpontSystemCatalog::BIGINT;
rt.colWidth = 8;
}
else if (fp[0]->data()->resultType().colDataType == CalpontSystemCatalog::DECIMAL ||
fp[0]->data()->resultType().colDataType == CalpontSystemCatalog::UDECIMAL ||
fp[1]->data()->resultType().colDataType == CalpontSystemCatalog::DECIMAL ||
fp[1]->data()->resultType().colDataType == CalpontSystemCatalog::UDECIMAL)
{
rt.colDataType = CalpontSystemCatalog::DECIMAL;
rt.colWidth = 8;
}
else
{
if (isUnsigned(fp[0]->data()->resultType().colDataType) ||
isUnsigned(fp[1]->data()->resultType().colDataType))
{
rt.colDataType = CalpontSystemCatalog::UBIGINT;
rt.colWidth = 8;
}
else
{
rt.colDataType = CalpontSystemCatalog::BIGINT;
rt.colWidth = 8;
}
}
return rt;
}
/**
* getDoubleVal API definition
*
* This API is called when an double value is needed to return from the UDF function
*/
double MCS_add::getDoubleVal(Row& row,
FunctionParm& parm,
bool& isNull,
CalpontSystemCatalog::ColType& op_ct)
{
switch (op_ct.colDataType)
{
// The APIs for the evaluation of the function parameters are the same getXXXval()
// functions. However, only two arguments are passed in, the current
// row reference and the NULL indicator isNull.
case CalpontSystemCatalog::BIGINT:
case CalpontSystemCatalog::MEDINT:
case CalpontSystemCatalog::SMALLINT:
case CalpontSystemCatalog::TINYINT:
return ( parm[0]->data()->getIntVal(row, isNull) +
parm[1]->data()->getIntVal(row, isNull));
case CalpontSystemCatalog::UBIGINT:
case CalpontSystemCatalog::UMEDINT:
case CalpontSystemCatalog::USMALLINT:
case CalpontSystemCatalog::UTINYINT:
return ( parm[0]->data()->getUintVal(row, isNull) +
parm[1]->data()->getUintVal(row, isNull));
case CalpontSystemCatalog::DOUBLE:
return ( parm[0]->data()->getDoubleVal(row, isNull) +
parm[1]->data()->getDoubleVal(row, isNull));
case CalpontSystemCatalog::DECIMAL:
case CalpontSystemCatalog::UDECIMAL:
{
IDB_Decimal dec;
IDB_Decimal op1 = parm[0]->data()->getDecimalVal(row, isNull);
IDB_Decimal op2 = parm[1]->data()->getDecimalVal(row, isNull);
if (op1.scale == op2.scale)
{
dec.scale = op1.scale;
}
else if (op1.scale >= op2.scale)
{
dec.scale = op2.scale;
op1.value *= (int64_t)pow((double)10, op1.scale - op2.scale);
}
else
{
dec.scale = op1.scale;
op2.value *= (int64_t)pow((double)10, op2.scale - op1.scale);
}
dec.value = op1.value + op2.value;
return (double)(dec.value / pow((double)10, dec.scale));
}
default:
return ( parm[0]->data()->getDoubleVal(row, isNull) +
parm[1]->data()->getDoubleVal(row, isNull));
}
return 0;
}
float MCS_add::getFloatVal(Row& row,
FunctionParm& parm,
bool& isNull,
CalpontSystemCatalog::ColType& op_ct)
{
return (float)getDoubleVal(row, parm, isNull, op_ct);
}
/**
* getIntVal API definition
*
* This API is called when an integer value is needed to return from the UDF function
*
* Because the result type MCS_add is double(real), all the other API can simply call
* getDoubleVal and apply the conversion. This method may not fit for all the UDF
* implementation.
*/
int64_t MCS_add::getIntVal(Row& row,
FunctionParm& parm,
bool& isNull,
CalpontSystemCatalog::ColType& op_ct)
{
return (int64_t)getDoubleVal(row, parm, isNull, op_ct);
}
string MCS_add::getStrVal(Row& row,
FunctionParm& parm,
bool& isNull,
CalpontSystemCatalog::ColType& op_ct)
{
// One will need a more efficient implementation if this API is frequently
// called for this UDF function. This code is for demonstration purpose.
ostringstream oss;
oss << getDoubleVal(row, parm, isNull, op_ct);
return oss.str();
}
IDB_Decimal MCS_add::getDecimalVal(Row& row,
FunctionParm& parm,
bool& isNull,
CalpontSystemCatalog::ColType& op_ct)
{
IDB_Decimal dec;
dec.value = getIntVal(row, parm, isNull, op_ct);
dec.scale = 0;
return dec;
}
/**
* This API should never be called for MCS_add, because the latter
* is not for date/datetime values addition. In such case, one can
* either not implement this API and an IDB-5001 error will be thrown,
* or throw a customized exception here.
*/
int32_t MCS_add::getDateIntVal(Row& row,
FunctionParm& parm,
bool& isNull,
CalpontSystemCatalog::ColType& op_ct)
{
throw logic_error("Invalid API called for MCS_ADD");
}
/**
* This API should never be called for MCS_add, because the latter
* is not for date/datetime values addition. In such case, one can
* either not implement this API and an IDB-5001 error will be thrown,
* or throw a customized exception here.
*/
int64_t MCS_add::getDatetimeIntVal(Row& row,
FunctionParm& parm,
bool& isNull,
CalpontSystemCatalog::ColType& op_ct)
{
return (int64_t)getDoubleVal(row, parm, isNull, op_ct);
}
bool MCS_add::getBoolVal(Row& row,
FunctionParm& parm,
bool& isNull,
CalpontSystemCatalog::ColType& op_ct)
{
return false;
}
/***************************************************************************
* MCS_ISNULL implementation
*
* OperationType() definition
*/
CalpontSystemCatalog::ColType MCS_isnull::operationType (FunctionParm& fp,
CalpontSystemCatalog::ColType& resultType)
{
// operation type of MCS_isnull should be the same as the argument type
assert (fp.size() == 1);
return fp[0]->data()->resultType();
}
/**
* getBoolVal API definition
*
* This would be the most commonly called API for MCS_isnull function
*/
bool MCS_isnull::getBoolVal(Row& row,
FunctionParm& parm,
bool& isNull,
CalpontSystemCatalog::ColType& op_ct)
{
switch (op_ct.colDataType)
{
// For the purpose of this function, one does not need to get the value of
// the argument. One only need to know if the argument is NULL. The passed
// in parameter isNull will be set if the parameter is evaluated NULL.
// Please note that before this function returns, isNull should be set to
// false, otherwise the result of the function would be considered NULL,
// which is not possible for MCS_isnull().
case CalpontSystemCatalog::DECIMAL:
case CalpontSystemCatalog::UDECIMAL:
parm[0]->data()->getDecimalVal(row, isNull);
break;
case CalpontSystemCatalog::CHAR:
case CalpontSystemCatalog::VARCHAR:
parm[0]->data()->getStrVal(row, isNull);
break;
default:
parm[0]->data()->getIntVal(row, isNull);
}
bool ret = isNull;
// It's important to reset isNull indicator.
isNull = false;
return ret;
}
/**
* getDoubleVal API definition
*
* This API is called when a double value is needed to return from the UDF function
*/
double MCS_isnull::getDoubleVal(Row& row,
FunctionParm& parm,
bool& isNull,
CalpontSystemCatalog::ColType& op_ct)
{
return (getBoolVal(row, parm, isNull, op_ct) ? 1 : 0);
}
float MCS_isnull::getFloatVal(Row& row,
FunctionParm& parm,
bool& isNull,
CalpontSystemCatalog::ColType& op_ct)
{
return (getBoolVal(row, parm, isNull, op_ct) ? 1 : 0);
}
/**
* getIntVal API definition
*
* This API is called when an integer value is needed to return from the UDF function
*
* Because the result type MCS_add is double(real), all the other API can simply call
* getDoubleVal and apply the conversion. This method may not fit for all the UDF
* implementations.
*/
int64_t MCS_isnull::getIntVal(Row& row,
FunctionParm& parm,
bool& isNull,
CalpontSystemCatalog::ColType& op_ct)
{
return (getBoolVal(row, parm, isNull, op_ct) ? 1 : 0);
}
string MCS_isnull::getStrVal(Row& row,
FunctionParm& parm,
bool& isNull,
CalpontSystemCatalog::ColType& op_ct)
{
// This needs to be more efficient if this API will be frequently
// called for this UDF function.
return (getBoolVal(row, parm, isNull, op_ct) ? "1" : "0");
}
IDB_Decimal MCS_isnull::getDecimalVal(Row& row,
FunctionParm& parm,
bool& isNull,
CalpontSystemCatalog::ColType& op_ct)
{
IDB_Decimal dec;
dec.value = (getBoolVal(row, parm, isNull, op_ct) ? 1 : 0);
dec.scale = 0;
return dec;
}
int32_t MCS_isnull::getDateIntVal(Row& row,
FunctionParm& parm,
bool& isNull,
CalpontSystemCatalog::ColType& op_ct)
{
return (getBoolVal(row, parm, isNull, op_ct) ? 1 : 0);
}
int64_t MCS_isnull::getDatetimeIntVal(Row& row,
FunctionParm& parm,
bool& isNull,
CalpontSystemCatalog::ColType& op_ct)
{
return (getBoolVal(row, parm, isNull, op_ct) ? 1 : 0);
}
}
// vim:ts=4 sw=4:
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