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99 lines
2.6 KiB
C++
99 lines
2.6 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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#include "checks.h"
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namespace funcexp
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{
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CalpontSystemCatalog::ColType Func_elt::operationType(FunctionParm& /*fp*/,
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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, FunctionParm& parm, 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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case CalpontSystemCatalog::UDECIMAL:
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{
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number = static_cast<uint64_t>(parm[0]->data()->getDecimalVal(row, isNull).toSInt64Round());
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break;
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}
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default: isNull = true; 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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std::string ret;
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stringValue(parm[number], row, isNull, ret);
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return ret;
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}
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} // namespace funcexp
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