mariadb-columnstore-engine/utils/funcexp/func_to_days.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_to_days.cpp 3923 2013-06-19 21:43:06Z bwilkinson $
*
*
****************************************************************************/

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

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

#include "dataconvert.h"

#include "errorcodes.h"
#include "idberrorinfo.h"
#include "errorids.h"
using namespace logging;


namespace funcexp
{

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

int64_t Func_to_days::getIntVal(rowgroup::Row& row,
                                FunctionParm& parm,
                                bool& isNull,
                                CalpontSystemCatalog::ColType& op_ct)
{
    CalpontSystemCatalog::ColDataType type = parm[0]->data()->resultType().colDataType;

    uint32_t year = 0,
             month = 0,
             day = 0;

    switch (type)
    {
        case execplan::CalpontSystemCatalog::DATE:
        {
            int32_t val = parm[0]->data()->getDateIntVal(row, isNull);
            year = (uint32_t)((val >> 16) & 0xffff);
            month = (uint32_t)((val >> 12) & 0xf);
            day = (uint32_t)((val >> 6) & 0x3f);
            return helpers::calc_mysql_daynr(year, month, day);
            break;
        }

        case execplan::CalpontSystemCatalog::DATETIME:
        {
            int64_t val = parm[0]->data()->getDatetimeIntVal(row, isNull);
            year = (uint32_t)((val >> 48) & 0xffff);
            month = (uint32_t)((val >> 44) & 0xf);
            day = (uint32_t)((val >> 38) & 0x3f);

            return helpers::calc_mysql_daynr(year, month, day);
            break;
        }

        case execplan::CalpontSystemCatalog::VARCHAR: // including CHAR'
        case execplan::CalpontSystemCatalog::CHAR:
        case execplan::CalpontSystemCatalog::TEXT:
        {
            const string& value = parm[0]->data()->getStrVal(row, isNull);
            int64_t val = 0;

            if ( value.size() == 10 )
            {
                // date type
                val = dataconvert::DataConvert::dateToInt(value);
                year = (uint32_t)((val >> 16) & 0xffff);
                month = (uint32_t)((val >> 12) & 0xf);
                day = (uint32_t)((val >> 6) & 0x3f);
            }
            else
            {
                // datetime type
                val = dataconvert::DataConvert::datetimeToInt(value);
                year = (uint32_t)((val >> 48) & 0xffff);
                month = (uint32_t)((val >> 44) & 0xf);
                day = (uint32_t)((val >> 38) & 0x3f);
            }

            return helpers::calc_mysql_daynr(year, month, day);
            break;
        }

        default:
        {
            std::ostringstream oss;
            oss << "to_days: datatype of " << execplan::colDataTypeToString(type);;
            throw logging::IDBExcept(oss.str(), ERR_DATATYPE_NOT_SUPPORT);
        }
    }

    return 0;
}


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