mariadb-columnstore-engine/utils/funcexp/func_monthname.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_monthname.cpp 2477 2011-04-01 16:07:35Z rdempsey $
*
*
****************************************************************************/

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

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

#include "dataconvert.h"

namespace funcexp
{

CalpontSystemCatalog::ColType Func_monthname::operationType( FunctionParm& fp, CalpontSystemCatalog::ColType& resultType )
{
    return resultType;
}

string Func_monthname::getStrVal(rowgroup::Row& row,
                                 FunctionParm& parm,
                                 bool& isNull,
                                 CalpontSystemCatalog::ColType& op_ct)
{
    uint32_t month = getIntVal(row, parm, isNull, op_ct);
    return helpers::monthFullNames[month];
}

int32_t Func_monthname::getDateIntVal(rowgroup::Row& row,
                                      FunctionParm& parm,
                                      bool& isNull,
                                      CalpontSystemCatalog::ColType& ct)
{
    uint32_t val = getIntVal(row, parm, isNull, ct);
    return val;
}

int64_t Func_monthname::getDatetimeIntVal(rowgroup::Row& row,
        FunctionParm& parm,
        bool& isNull,
        CalpontSystemCatalog::ColType& ct)
{
    uint32_t val = getIntVal(row, parm, isNull, ct);
    return val;
}

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

    switch (parm[0]->data()->resultType().colDataType)
    {
        case CalpontSystemCatalog::DATE:
            val = parm[0]->data()->getIntVal(row, isNull);
            return (unsigned)((val >> 12) & 0xf);

        case CalpontSystemCatalog::DATETIME:
            val = parm[0]->data()->getIntVal(row, isNull);
            return (unsigned)((val >> 44) & 0xf);

        case CalpontSystemCatalog::CHAR:
        case CalpontSystemCatalog::TEXT:
        case CalpontSystemCatalog::VARCHAR:
            val = dataconvert::DataConvert::stringToDatetime(parm[0]->data()->getStrVal(row, isNull));

            if (val == -1)
            {
                isNull = true;
                return -1;
            }
            else
            {
                return (unsigned)((val >> 44) & 0xf);
            }

            break;

        case CalpontSystemCatalog::BIGINT:
        case CalpontSystemCatalog::MEDINT:
        case CalpontSystemCatalog::SMALLINT:
        case CalpontSystemCatalog::TINYINT:
        case CalpontSystemCatalog::INT:
            val = dataconvert::DataConvert::intToDatetime(parm[0]->data()->getIntVal(row, isNull));

            if (val == -1)
            {
                isNull = true;
                return -1;
            }
            else
            {
                return (unsigned)((val >> 44) & 0xf);
            }

            break;

        case CalpontSystemCatalog::DECIMAL:
            if (parm[0]->data()->resultType().scale == 0)
            {
                val = dataconvert::DataConvert::intToDatetime(parm[0]->data()->getIntVal(row, isNull));

                if (val == -1)
                {
                    isNull = true;
                    return -1;
                }
                else
                {
                    return (unsigned)((val >> 44) & 0xf);
                }
            }

            break;

        default:
            isNull = true;
            return -1;
    }

    return -1;
}

double Func_monthname::getDoubleVal(rowgroup::Row& row,
                                    FunctionParm& parm,
                                    bool& isNull,
                                    execplan::CalpontSystemCatalog::ColType& op_ct)
{
    return 0;
}

execplan::IDB_Decimal Func_monthname::getDecimalVal(rowgroup::Row& row,
        FunctionParm& fp,
        bool& isNull,
        execplan::CalpontSystemCatalog::ColType& op_ct)
{
    IDB_Decimal d;
    d.value = getIntVal(row, fp, isNull, op_ct);
    d.scale = 0;
    return d;
}



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