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110 lines
2.9 KiB
C++
110 lines
2.9 KiB
C++
/* Copyright (C) 2014 InfiniDB, Inc.
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License
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as published by the Free Software Foundation; version 2 of
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the License.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
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MA 02110-1301, USA. */
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/****************************************************************************
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* $Id: func_elt.cpp 2665 2011-06-01 20:42:52Z rdempsey $
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*
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*
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****************************************************************************/
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#include <cstdlib>
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#include <string>
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using namespace std;
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#include "functor_str.h"
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#include "funchelpers.h"
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#include "functioncolumn.h"
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#include "rowgroup.h"
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using namespace execplan;
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#include "dataconvert.h"
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using namespace dataconvert;
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namespace funcexp
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{
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CalpontSystemCatalog::ColType Func_elt::operationType( FunctionParm& fp, CalpontSystemCatalog::ColType& resultType )
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{
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return resultType;
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}
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string Func_elt::getStrVal(rowgroup::Row& row,
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FunctionParm& parm,
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bool& isNull,
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CalpontSystemCatalog::ColType&)
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{
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uint64_t number = 0;
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//get number
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switch (parm[0]->data()->resultType().colDataType)
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{
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case CalpontSystemCatalog::BIGINT:
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case CalpontSystemCatalog::MEDINT:
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case CalpontSystemCatalog::SMALLINT:
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case CalpontSystemCatalog::TINYINT:
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case CalpontSystemCatalog::INT:
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case CalpontSystemCatalog::DOUBLE:
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case CalpontSystemCatalog::FLOAT:
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case CalpontSystemCatalog::CHAR:
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case CalpontSystemCatalog::TEXT:
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case CalpontSystemCatalog::VARCHAR:
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{
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double value = parm[0]->data()->getDoubleVal(row, isNull);
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number = (int64_t) value;
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break;
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}
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case CalpontSystemCatalog::DECIMAL:
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{
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IDB_Decimal d = parm[0]->data()->getDecimalVal(row, isNull);
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number = d.value / helpers::power(d.scale);
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int lefto = (d.value - number * helpers::power(d.scale)) / helpers::power(d.scale - 1);
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if ( number >= 0 && lefto > 4 )
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number++;
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if ( number < 0 && lefto < -4 )
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number--;
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break;
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}
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default:
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isNull = true;
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return "";
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}
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if (number < 1)
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{
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isNull = true;
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return "";
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}
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if (number > parm.size() - 1 )
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{
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isNull = true;
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return "";
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}
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return stringValue(parm[number], row, isNull);
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}
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} // namespace funcexp
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// vim:ts=4 sw=4:
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