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

#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_int.h"
#include "funchelpers.h"

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

int64_t Func_ascii::getIntVal(rowgroup::Row& row, FunctionParm& parm, bool& isNull,
                              CalpontSystemCatalog::ColType& /*op_ct*/)
{
  const auto& str = parm[0]->data()->getStrVal(row, isNull);

  if (str.isNull() || str.length() < 1)
    return 0;

  return (unsigned char)(str.str())[0];
}

}  // namespace funcexp