the begginning

utils/funcexp/func_last_day.cpp

@@ -0,0 +1,157 @@
+/* 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_last_day.cpp 2477 2011-05-11 16:07:35Z chao $
+*
+*
+****************************************************************************/
+
+#include <cstdlib>
+#include <string>
+#include <sstream>
+using namespace std;
+
+#include "functor_int.h"
+#include "funchelpers.h"
+#include "functioncolumn.h"
+#include "rowgroup.h"
+using namespace execplan;
+
+#include "dataconvert.h"
+using namespace dataconvert;
+
+namespace funcexp
+{
+
+CalpontSystemCatalog::ColType Func_last_day::operationType( FunctionParm& fp, CalpontSystemCatalog::ColType& resultType )
+{
+	return resultType;
+}
+
+
+int64_t Func_last_day::getIntVal(rowgroup::Row& row,
+						FunctionParm& parm,
+						bool& isNull,
+						CalpontSystemCatalog::ColType& op_ct)
+{
+	uint32_t year = 0;
+	uint32_t month = 0;
+	uint32_t day = 0;
+	int64_t val = 0;
+	
+	switch (parm[0]->data()->resultType().colDataType)
+	{
+		case CalpontSystemCatalog::DATE:
+			val = parm[0]->data()->getIntVal(row, isNull);
+			year = (uint32_t)((val >> 16) & 0xffff);
+			month = (uint32_t)((val >> 12) & 0xf);
+			day = (uint32_t)((val >> 6) & 0x3f);
+			break;
+		case CalpontSystemCatalog::DATETIME:
+			val = parm[0]->data()->getIntVal(row, isNull);
+			year = (uint32_t)((val >> 48) & 0xffff);
+			month = (uint32_t)((val >> 44) & 0xf);
+			day = (uint32_t)((val >> 38) & 0x3f);
+			break;
+		case CalpontSystemCatalog::CHAR:
+		case CalpontSystemCatalog::VARCHAR:
+			val = dataconvert::DataConvert::stringToDatetime(parm[0]->data()->getStrVal(row, isNull));
+			if (val == -1)
+			{
+				isNull = true;
+				return -1;
+			}
+			else
+			{
+				year = (uint32_t)((val >> 48) & 0xffff);
+				month = (uint32_t)((val >> 44) & 0xf);
+				day = (uint32_t)((val >> 38) & 0x3f);
+			}
+			break;
+		case CalpontSystemCatalog::BIGINT:
+		case CalpontSystemCatalog::MEDINT:
+		case CalpontSystemCatalog::SMALLINT:
+		case CalpontSystemCatalog::TINYINT:
+		case CalpontSystemCatalog::INT:
+			val = dataconvert::DataConvert::intToDatetime(parm[0]->data()->getIntVal(row, isNull));
+			if (val == -1)
+			{
+				isNull = true;
+				return -1;
+			}
+			else
+			{
+				year = (uint32_t)((val >> 48) & 0xffff);
+				month = (uint32_t)((val >> 44) & 0xf);
+				day = (uint32_t)((val >> 38) & 0x3f);
+			}
+			break;	
+		case CalpontSystemCatalog::DECIMAL:
+			if (parm[0]->data()->resultType().scale == 0)
+			{
+				val = dataconvert::DataConvert::intToDatetime(parm[0]->data()->getIntVal(row, isNull));
+				if (val == -1)
+				{
+					isNull = true;
+					return -1;
+				}
+				else
+				{
+					year = (uint32_t)((val >> 48) & 0xffff);
+					month = (uint32_t)((val >> 44) & 0xf);
+					day = (uint32_t)((val >> 38) & 0x3f);
+				}
+			}
+			break;
+		default:
+			isNull = true;
+			return -1;
+	}
+	uint32_t lastday = day;
+	if (isLeapYear(year) && (month == 2))
+	{
+		lastday = 29;
+	}
+	else if ( month == 2)
+	{
+		lastday = 28;
+	}
+	else
+	{
+		lastday = daysInMonth[month-1];
+	}
+	if (day > lastday)
+	{
+		isNull = true;
+		return -1;
+	}
+	dataconvert::DateTime aDay;
+	aDay.year = year;
+	aDay.month = month;
+	aDay.day = lastday;
+	aDay.hour = 0;
+	aDay.minute = 0;
+	aDay.second = 0;
+	aDay.msecond = 0;
+	val = *(reinterpret_cast<uint64_t*>(&aDay));
+	return val;
+}
+
+
+} // namespace funcexp
+// vim:ts=4 sw=4: