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87 lines
2.3 KiB
C++
87 lines
2.3 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_exp.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 <cerrno>
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using namespace std;
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#include "functor_real.h"
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#include "functioncolumn.h"
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using namespace execplan;
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#include "rowgroup.h"
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using namespace rowgroup;
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#include "errorcodes.h"
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#include "idberrorinfo.h"
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#include "errorids.h"
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using namespace logging;
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namespace funcexp
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{
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CalpontSystemCatalog::ColType Func_exp::operationType(FunctionParm& fp, CalpontSystemCatalog::ColType& resultType)
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{
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// operation type is not used by this functor
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return fp[0]->data()->resultType();
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}
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double Func_exp::getDoubleVal(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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// null value is indicated by isNull
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double x = parm[0]->data()->getDoubleVal(row, isNull);
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double ret = 0.0;
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if (!isNull)
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{
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errno = 0;
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ret = exp(x);
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if (errno == ERANGE) // display NULL for out range value
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{
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if (x > 0)
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{
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isNull = true;
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Message::Args args;
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args.add("exp");
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args.add(x);
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unsigned errcode = ERR_FUNC_OUT_OF_RANGE_RESULT;
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throw IDBExcept(IDBErrorInfo::instance()->errorMsg(errcode, args), errcode);
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}
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else
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ret = 0.0;
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}
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}
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return ret;
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}
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} // namespace funcexp
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// vim:ts=4 sw=4:
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