mariadb-columnstore-engine/utils/funcexp/func_sign.cpp

/* Copyright (C) 2014 InfiniDB, Inc.

   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: func_sign.cpp 3495 2013-01-21 14:09:51Z rdempsey $
*
*
****************************************************************************/

#include <cstdlib>
#include <string>
#include <sstream>
using namespace std;

#include "functor_int.h"
#include "functioncolumn.h"
#include "rowgroup.h"
using namespace execplan;

namespace funcexp
{
CalpontSystemCatalog::ColType Func_sign::operationType( FunctionParm& fp, CalpontSystemCatalog::ColType& resultType )
{
    CalpontSystemCatalog::ColType ct;
    ct.colDataType = CalpontSystemCatalog::BIGINT;
    ct.colWidth = 8;
    return ct;
}

int64_t Func_sign::getIntVal(rowgroup::Row& row,
                             FunctionParm& parm,
                             bool& isNull,
                             CalpontSystemCatalog::ColType& op_ct)
{
    double val = parm[0]->data()->getDoubleVal(row, isNull);

    if (isNull)
        return 0;
    else if (val > 0)
        return 1;
    else if (val < 0)
        return -1;
    else
        return 0;
}

string Func_sign::getStrVal(rowgroup::Row& row,
                            FunctionParm& parm,
                            bool& isNull,
                            CalpontSystemCatalog::ColType& op_ct)
{
    int64_t sign = getIntVal(row, parm, isNull, op_ct);

    if (sign > 0)
        return string("1");
    else if (sign < 0)
        return string("-1");
    else
        return string("0");
}

} // namespace funcexp
// vim:ts=4 sw=4: