the begginning

utils/funcexp/func_maketime.cpp

@@ -0,0 +1,189 @@
+/* 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_maketime.cpp 2665 2011-06-01 20:42:52Z rdempsey $
+*
+*
+****************************************************************************/
+
+#include <cstdlib>
+#include <string>
+#include <iomanip>
+using namespace std;
+
+#include "functor_str.h"
+#include "funchelpers.h"
+#include "functioncolumn.h"
+#include "rowgroup.h"
+using namespace execplan;
+
+#include "dataconvert.h"
+using namespace dataconvert;
+
+namespace funcexp
+{
+
+CalpontSystemCatalog::ColType Func_maketime::operationType( FunctionParm& fp, CalpontSystemCatalog::ColType& resultType )
+{
+	return resultType;
+}
+
+string Func_maketime::getStrVal(rowgroup::Row& row,
+							FunctionParm& parm,
+							bool& isNull,
+							CalpontSystemCatalog::ColType&)
+{
+	int64_t hour = 0;
+	int64_t min = 0;
+	int64_t sec = 0;
+
+	//get hour
+	switch (parm[0]->data()->resultType().colDataType)
+	{
+		case CalpontSystemCatalog::BIGINT:
+		case CalpontSystemCatalog::MEDINT:
+		case CalpontSystemCatalog::SMALLINT:
+		case CalpontSystemCatalog::TINYINT:
+		case CalpontSystemCatalog::INT:
+		case CalpontSystemCatalog::DOUBLE:
+		case CalpontSystemCatalog::FLOAT:
+		case CalpontSystemCatalog::CHAR:
+		case CalpontSystemCatalog::VARCHAR:
+		{
+			double value = parm[0]->data()->getDoubleVal(row, isNull);
+			hour = (int64_t) value;
+			break;
+		}
+		case CalpontSystemCatalog::DECIMAL:
+		{
+			IDB_Decimal d = parm[0]->data()->getDecimalVal(row, isNull);
+			hour = d.value / helpers::power(d.scale);
+			int lefto = (d.value - hour * helpers::power(d.scale)) / helpers::power(d.scale-1);
+			if ( hour >= 0 && lefto > 4 )
+				hour++;
+			if ( hour < 0 && lefto < -4 )
+				hour--;
+			break;
+		}
+		default:
+			isNull = true;
+			return "";
+	}
+
+	//get minute
+	switch (parm[1]->data()->resultType().colDataType)
+	{
+		case CalpontSystemCatalog::BIGINT:
+		case CalpontSystemCatalog::MEDINT:
+		case CalpontSystemCatalog::SMALLINT:
+		case CalpontSystemCatalog::TINYINT:
+		case CalpontSystemCatalog::INT:
+		case CalpontSystemCatalog::DOUBLE:
+		case CalpontSystemCatalog::FLOAT:
+		case CalpontSystemCatalog::CHAR:
+		case CalpontSystemCatalog::VARCHAR:
+		{
+			double value = parm[1]->data()->getDoubleVal(row, isNull);
+			min = (int64_t) value;
+			break;
+		}
+		case CalpontSystemCatalog::DECIMAL:
+		{
+			IDB_Decimal d = parm[1]->data()->getDecimalVal(row, isNull);
+			min = d.value / helpers::power(d.scale);
+			int lefto = (d.value - min * helpers::power(d.scale)) / helpers::power(d.scale-1);
+			if ( min >= 0 && lefto > 4 )
+				min++;
+			if ( min < 0 && lefto < -4 )
+				min--;
+			break;
+		}
+		default:
+			isNull = true;
+			return "";
+	}
+
+	if (min < 0 || min > 59)
+	{
+		isNull = true;
+		return "";
+	}
+
+	//get second
+	switch (parm[2]->data()->resultType().colDataType)
+	{
+		case CalpontSystemCatalog::BIGINT:
+		case CalpontSystemCatalog::MEDINT:
+		case CalpontSystemCatalog::SMALLINT:
+		case CalpontSystemCatalog::TINYINT:
+		case CalpontSystemCatalog::INT:
+		case CalpontSystemCatalog::DOUBLE:
+		case CalpontSystemCatalog::FLOAT:
+		case CalpontSystemCatalog::CHAR:
+		case CalpontSystemCatalog::VARCHAR:
+		{
+			double value = parm[2]->data()->getDoubleVal(row, isNull);
+			sec = (int64_t) value;
+			break;
+		}
+		case CalpontSystemCatalog::DECIMAL:
+		{
+			IDB_Decimal d = parm[2]->data()->getDecimalVal(row, isNull);
+			sec = d.value / helpers::power(d.scale);
+			int lefto = (d.value - sec * helpers::power(d.scale)) / helpers::power(d.scale-1);
+			if ( sec >= 0 && lefto > 4 )
+				sec++;
+			if ( sec < 0 && lefto < -4 )
+				sec--;
+			break;
+		}
+		default:
+			isNull = true;
+			return "";
+	}
+
+	if (sec < 0 || sec > 59)
+	{
+		isNull = true;
+		return "";
+	}
+
+	if (hour > 838)
+	{
+		hour = 838;
+		min = 59;
+		sec = 59;
+	}
+
+	if (hour < -838)
+	{
+		hour = -838;
+		min = 59;
+		sec = 59;
+	}
+
+	// in worst case hour is 4 characters (3 digits + '-') so max
+    // string length is 11 (4:2:2 + '\0')
+    char buf[11];
+    snprintf(buf, 11, "%02d:%02d:%02d", (int) hour, (int) min, (int) sec);
+    return buf;
+}
+
+
+} // namespace funcexp
+// vim:ts=4 sw=4: