the begginning

utils/funcexp/func_concat.cpp

@@ -0,0 +1,68 @@
+/* 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_concat.cpp 3918 2013-06-19 13:54:34Z bwilkinson $
+*
+*
+****************************************************************************/
+
+#include <string>
+using namespace std;
+
+#include "functor_str.h"
+#include "functioncolumn.h"
+#include "utils_utf8.h"
+using namespace execplan;
+
+#include "rowgroup.h"
+using namespace rowgroup;
+
+#include "dataconvert.h"
+using namespace dataconvert;
+
+#define STRCOLL_ENH__
+
+namespace funcexp
+{
+
+CalpontSystemCatalog::ColType Func_concat::operationType(FunctionParm& fp, CalpontSystemCatalog::ColType& resultType )
+{
+	// operation type is not used by this functor
+	return fp[0]->data()->resultType();
+}
+
+
+// Returns the string that results from concatenating the arguments.
+// concat() returns NULL if any argument is NULL.
+//
+string Func_concat::getStrVal(Row& row,
+								FunctionParm& parm,
+								bool& isNull,
+								CalpontSystemCatalog::ColType&)
+{
+	string ret = stringValue(parm[0], row, isNull);
+
+	for ( unsigned int id = 1 ; id < parm.size() ; id++) {
+		ret.append( stringValue(parm[id], row, isNull) );
+	}
+
+	return ret;
+}
+
+} // namespace funcexp
+// vim:ts=4 sw=4: