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https://github.com/mariadb-corporation/mariadb-columnstore-engine.git
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101 lines
2.8 KiB
C++
101 lines
2.8 KiB
C++
/* Copyright (C) 2014 InfiniDB, Inc.
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License
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as published by the Free Software Foundation; version 2 of
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the License.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
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MA 02110-1301, USA. */
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/****************************************************************************
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* $Id: func_strcmp.cpp 2477 2011-04-01 16:07:35Z rdempsey $
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*
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*
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****************************************************************************/
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#include <cstdlib>
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#include <string>
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#include <sstream>
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using namespace std;
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#include "functor_int.h"
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#include "functioncolumn.h"
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using namespace execplan;
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#include "rowgroup.h"
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using namespace rowgroup;
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#include "joblisttypes.h"
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using namespace joblist;
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#include "utils_utf8.h"
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using namespace funcexp;
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#include "collation.h"
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// Because including my_sys.h in a Columnstore header causes too many conflicts
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struct charset_info_st;
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typedef const struct charset_info_st CHARSET_INFO;
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class to_lower
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{
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public:
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char operator() (char c) const // notice the return type
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{
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return tolower(c);
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}
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};
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namespace funcexp
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{
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CalpontSystemCatalog::ColType Func_strcmp::operationType(FunctionParm& fp, CalpontSystemCatalog::ColType& resultType)
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{
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// operation type is not used by this functor
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//return fp[0]->data()->resultType();
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return resultType;
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}
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int64_t Func_strcmp::getIntVal(rowgroup::Row& row,
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FunctionParm& fp,
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bool& isNull,
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execplan::CalpontSystemCatalog::ColType& type)
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{
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CHARSET_INFO* cs = fp[0]->data()->resultType().getCharset();
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const string& str = fp[0]->data()->getStrVal(row, isNull);
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const string& str1 = fp[1]->data()->getStrVal(row, isNull);
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int ret = cs->strnncollsp(str.c_str(), str.length(), str1.c_str(), str1.length());
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// mysql's strcmp returns only -1, 0, and 1
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return (ret < 0 ? -1 : (ret > 0 ? 1 : 0));
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}
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std::string Func_strcmp::getStrVal(rowgroup::Row& row,
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FunctionParm& fp,
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bool& isNull,
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execplan::CalpontSystemCatalog::ColType& type)
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{
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uint64_t val = getIntVal(row, fp, isNull, type);
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if (val > 0)
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return string("1");
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else if (val < 0)
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return string("-1");
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else
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return string("0");
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}
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} // namespace funcexp
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// vim:ts=4 sw=4:
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