mariadb-columnstore-engine/utils/funcexp/func_length.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_length.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"
using namespace execplan;

#include "rowgroup.h"

namespace funcexp
{
CalpontSystemCatalog::ColType Func_length::operationType(FunctionParm& /*fp*/,
                                                         CalpontSystemCatalog::ColType& /*resultType*/)
{
  CalpontSystemCatalog::ColType ct;
  ct.colDataType = CalpontSystemCatalog::VARCHAR;
  ct.colWidth = 255;
  return ct;
}

int64_t Func_length::getIntVal(rowgroup::Row& row, FunctionParm& fp, bool& isNull,
                               CalpontSystemCatalog::ColType&)
{
  if ((fp[0]->data()->resultType().colDataType == CalpontSystemCatalog::VARBINARY) ||
      (fp[0]->data()->resultType().colDataType == CalpontSystemCatalog::BLOB))
    return fp[0]->data()->getStrVal(row, isNull).length();

  const auto& str = fp[0]->data()->getStrVal(row, isNull);
  if (str.isNull())
  {
    return 0;
  }
  return strlen(str.str());
}

}  // namespace funcexp