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78 lines
2.2 KiB
C++
78 lines
2.2 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_sign.cpp 3495 2013-01-21 14:09:51Z 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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#include <sstream>
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using namespace std;
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#include "functor_int.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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namespace funcexp
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{
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CalpontSystemCatalog::ColType Func_sign::operationType( FunctionParm& fp, CalpontSystemCatalog::ColType& resultType )
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{
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CalpontSystemCatalog::ColType ct;
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ct.colDataType = CalpontSystemCatalog::BIGINT;
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ct.colWidth = 8;
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return ct;
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}
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int64_t Func_sign::getIntVal(rowgroup::Row& row,
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FunctionParm& parm,
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bool& isNull,
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CalpontSystemCatalog::ColType& op_ct)
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{
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double val = parm[0]->data()->getDoubleVal(row, isNull);
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if (isNull)
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return 0;
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else if (val > 0)
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return 1;
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else if (val < 0)
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return -1;
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else
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return 0;
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}
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string Func_sign::getStrVal(rowgroup::Row& row,
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FunctionParm& parm,
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bool& isNull,
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CalpontSystemCatalog::ColType& op_ct)
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{
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int64_t sign = getIntVal(row, parm, isNull, op_ct);
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if (sign > 0)
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return string("1");
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else if (sign < 0)
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return string("-1");
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else
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return string("0");
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}
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} // namespace funcexp
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// vim:ts=4 sw=4:
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