the begginning

utils/funcexp/func_str_to_date.cpp

@@ -0,0 +1,196 @@
+/* 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_str_to_date.cpp 2578 2011-05-12 16:26:55Z chao $
+*
+*
+****************************************************************************/
+
+#include <unistd.h>
+#include <cstdlib>
+#include <string>
+using namespace std;
+
+#include "functor_dtm.h"
+#include "funchelpers.h"
+#include "functioncolumn.h"
+#include "rowgroup.h"
+using namespace execplan;
+
+#include "dataconvert.h"
+#define MAX_DAY_NUMBER 3652424L
+
+#include "timeextract.h"
+
+namespace
+{
+using namespace funcexp;
+
+dataconvert::DateTime getDateTime (rowgroup::Row& row,
+							FunctionParm& parm,
+							bool& isNull,
+							CalpontSystemCatalog::ColType&)
+{
+	TimeExtractor extractor;
+	dataconvert::DateTime dateTime;
+	dateTime.year = 0;
+	dateTime.month = 0;
+	dateTime.day = 0;
+	dateTime.hour = 0;
+	dateTime.minute = 0;
+	dateTime.second = 0;
+	dateTime.msecond = 0;
+	int64_t val = 0;
+	string valStr;
+	const string& formatStr = parm[1]->data()->getStrVal(row, isNull);
+	int rc = 0;
+	switch (parm[0]->data()->resultType().colDataType)
+	{
+		case CalpontSystemCatalog::DATE:
+		{
+			val = parm[0]->data()->getIntVal(row, isNull);
+			valStr = dataconvert::DataConvert::dateToString (val);
+			rc = extractor.extractTime (valStr, formatStr, dateTime);
+			if ( rc < 0)
+			{
+				isNull = true;
+				return -1;
+			}
+			break;
+		}
+		case CalpontSystemCatalog::DATETIME:
+		{
+			val = parm[0]->data()->getIntVal(row, isNull);
+			valStr = dataconvert::DataConvert::datetimeToString (val);
+			rc = extractor.extractTime (valStr, formatStr, dateTime);
+			if ( rc < 0)
+			{
+				isNull = true;
+				return -1;
+			}
+			break;
+		}
+		case CalpontSystemCatalog::CHAR:
+		case CalpontSystemCatalog::VARCHAR:
+		{
+			const string& valref = parm[0]->data()->getStrVal(row, isNull);
+			//decode with provided format
+			rc = extractor.extractTime (valref, formatStr, dateTime);
+			if ( rc < 0)
+			{
+				isNull = true;
+				return -1;
+			}
+			break;
+		}
+		case CalpontSystemCatalog::BIGINT:
+		case CalpontSystemCatalog::MEDINT:
+		case CalpontSystemCatalog::SMALLINT:
+		case CalpontSystemCatalog::TINYINT:
+		case CalpontSystemCatalog::INT:	
+		{
+			val = parm[0]->data()->getIntVal(row, isNull);
+			//decode with provided format
+			rc = extractor.extractTime (helpers::intToString(val), formatStr, dateTime);
+			if ( rc < 0)
+			{
+				isNull = true;
+				return -1;
+			}
+			break;	
+		}
+		case CalpontSystemCatalog::DECIMAL:
+		{
+			if (parm[0]->data()->resultType().scale == 0)
+			{
+				val = parm[0]->data()->getIntVal(row, isNull);
+				
+				//decode with provided format
+				rc = extractor.extractTime (helpers::intToString(val), formatStr, dateTime);
+				if ( rc < 0)
+				{
+					isNull = true;
+					return -1;
+				}
+			}
+			break;
+		}
+		default:
+			isNull = true;
+			return -1;
+	}
+	return dateTime;
+}
+
+}
+
+namespace funcexp
+{
+
+CalpontSystemCatalog::ColType Func_str_to_date::operationType( FunctionParm& fp, CalpontSystemCatalog::ColType& resultType )
+{
+	return resultType;
+}
+
+string Func_str_to_date::getStrVal(rowgroup::Row& row,
+							FunctionParm& parm,
+							bool& isNull,
+							CalpontSystemCatalog::ColType& ct)
+{
+	dataconvert::DateTime dateTime;
+	dateTime = getDateTime(row, parm, isNull, ct);
+	string convertedDate = dataconvert::DataConvert::datetimeToString(*((long long*) &dateTime));
+	return convertedDate;
+}
+
+int32_t Func_str_to_date::getDateIntVal(rowgroup::Row& row,
+							FunctionParm& parm,
+							bool& isNull,
+							CalpontSystemCatalog::ColType& ct)
+{
+	dataconvert::DateTime dateTime;
+	dateTime = getDateTime(row, parm, isNull, ct);
+	int64_t time = *(reinterpret_cast<int64_t*>(&dateTime));
+	return ((((int32_t)(time >> 32)) & 0xFFFFFFC0) | 0x3E);
+}		
+
+int64_t Func_str_to_date::getDatetimeIntVal(rowgroup::Row& row,
+							FunctionParm& parm,
+							bool& isNull,
+							CalpontSystemCatalog::ColType& ct)
+{
+	dataconvert::DateTime dateTime;
+	dateTime = getDateTime(row, parm, isNull, ct);
+	int64_t time = *(reinterpret_cast<int64_t*>(&dateTime));
+	return time;
+}
+
+int64_t Func_str_to_date::getIntVal(rowgroup::Row& row,
+							FunctionParm& parm,
+							bool& isNull,
+							CalpontSystemCatalog::ColType& ct)
+{
+	dataconvert::DateTime dateTime;
+	dateTime = getDateTime(row, parm, isNull, ct);
+	int64_t time = *(reinterpret_cast<int64_t*>(&dateTime));
+	return time;
+}								
+
+
+} // namespace funcexp
+// vim:ts=4 sw=4: