mariadb-columnstore-engine/utils/funcexp/func_coalesce.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_coalesce.cpp 3495 2013-01-21 14:09:51Z rdempsey $
*
*
****************************************************************************/

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

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

#include "dataconvert.h"
using namespace dataconvert;

#include "functor_all.h"
#include "funchelpers.h"

namespace funcexp
{
CalpontSystemCatalog::ColType Func_coalesce::operationType( FunctionParm& fp, CalpontSystemCatalog::ColType& resultType )
{
    return resultType;
}

int64_t Func_coalesce::getIntVal(rowgroup::Row& row,
                                 FunctionParm& parm,
                                 bool& isNull,
                                 CalpontSystemCatalog::ColType& op_ct)
{
    int64_t val = 0;

    for (uint32_t i = 0; i < parm.size(); i++)
    {
        val = parm[i]->data()->getIntVal(row, isNull);

        if (isNull)
        {
            isNull = false;
            continue;
        }

        return val;
    }

    isNull = true;
    return val;
}

string Func_coalesce::getStrVal(rowgroup::Row& row,
                                FunctionParm& parm,
                                bool& isNull,
                                CalpontSystemCatalog::ColType& ct)
{
    string val;

    for (uint32_t i = 0; i < parm.size(); i++)
    {
        val = parm[i]->data()->getStrVal(row, isNull);

        if (isNull)
        {
            isNull = false;
            continue;
        }

        return val;
    }

    isNull = true;
    return "";
}

int32_t Func_coalesce::getDateIntVal(rowgroup::Row& row,
                                     FunctionParm& parm,
                                     bool& isNull,
                                     CalpontSystemCatalog::ColType& ct)
{
    int64_t val = 0;

    for (uint32_t i = 0; i < parm.size(); i++)
    {
        val = parm[i]->data()->getDateIntVal(row, isNull);

        if (isNull)
        {
            isNull = false;
            continue;
        }

        return val;
    }

    isNull = true;
    return val;
}

int64_t Func_coalesce::getDatetimeIntVal(rowgroup::Row& row,
        FunctionParm& parm,
        bool& isNull,
        CalpontSystemCatalog::ColType& ct)
{
    int64_t val = 0;

    for (uint32_t i = 0; i < parm.size(); i++)
    {
        val = parm[i]->data()->getDatetimeIntVal(row, isNull);

        if (isNull)
        {
            isNull = false;
            continue;
        }

        return val;
    }

    isNull = true;
    return val;
}

double Func_coalesce::getDoubleVal(rowgroup::Row& row,
                                   FunctionParm& parm,
                                   bool& isNull,
                                   execplan::CalpontSystemCatalog::ColType& ct)
{
    double d = 0.0;

    for (uint32_t i = 0; i < parm.size(); i++)
    {
        d = parm[i]->data()->getDoubleVal(row, isNull);

        if (isNull)
        {
            isNull = false;
            continue;
        }

        return d;
    }

    isNull = true;
    return d;
}


execplan::IDB_Decimal Func_coalesce::getDecimalVal(rowgroup::Row& row,
        FunctionParm& parm,
        bool& isNull,
        execplan::CalpontSystemCatalog::ColType& ct)
{
    IDB_Decimal d;

    for (uint32_t i = 0; i < parm.size(); i++)
    {
        d = parm[i]->data()->getDecimalVal(row, isNull);

        if (isNull)
        {
            isNull = false;
            continue;
        }

        return d;
    }

    isNull = true;
    return d;
}


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