the begginning

utils/windowfunction/framebound.cpp

@@ -0,0 +1,88 @@
+/* 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: framebound.cpp 3828 2013-05-22 17:58:14Z xlou $
+
+
+//#define NDEBUG
+#include <cassert>
+#include <cmath>
+#include <sstream>
+#include <iomanip>
+using namespace std;
+
+#include "idberrorinfo.h"
+#include "errorids.h"
+#include "exceptclasses.h"
+using namespace logging;
+
+#include "idborderby.h"
+using namespace ordering;
+
+#include "framebound.h"
+
+
+namespace windowfunction
+{
+
+
+int64_t FrameBound::getBound(int64_t b, int64_t e, int64_t c)
+{
+	if (fBoundType == WF__UNBOUNDED_PRECEDING)
+		return b;
+
+	return e;
+}
+
+
+const string FrameBound::toString() const
+{
+	ostringstream oss;
+	switch (fBoundType)
+	{
+		case WF__UNBOUNDED_PRECEDING:
+			oss << "unbound preceding";
+			break;
+		case WF__UNBOUNDED_FOLLOWING:
+			oss << "unbound following";
+			break;
+		case WF__CONSTANT_PRECEDING:
+			oss << "constant preceding";
+			break;
+		case WF__CONSTANT_FOLLOWING:
+			oss << "constant following";
+			break;
+		case WF__EXPRESSION_PRECEDING:
+			oss << "expression preceding";
+			break;
+		case WF__EXPRESSION_FOLLOWING:
+			oss << "expression following";
+			break;
+		case WF__CURRENT_ROW:
+		default:
+			oss << "current row";
+			break;
+	}
+	oss << endl;
+
+	return oss.str();
+}
+
+
+}   //namespace
+// vim:ts=4 sw=4:
+