the begginning

utils/funcexp/func_from_unixtime.cpp

@@ -0,0 +1,176 @@
+/* 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_from_unixtime.cpp 3923 2013-06-19 21:43:06Z bwilkinson $
+*
+*
+****************************************************************************/
+
+#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"
+using namespace dataconvert;
+
+
+namespace
+{
+using namespace funcexp;
+
+DateTime getDateTime(rowgroup::Row& row,
+							FunctionParm& parm,
+							bool& isNull)
+{
+	int64_t val;
+	switch (parm[0]->data()->resultType().colDataType)
+	{
+		case execplan::CalpontSystemCatalog::FLOAT:
+		case execplan::CalpontSystemCatalog::DOUBLE:
+		case execplan::CalpontSystemCatalog::DECIMAL:
+		{
+			double value = parm[0]->data()->getDoubleVal(row, isNull);
+			if (value > 0)
+				value += 0.5;
+			else if (value < 0)
+				value -= 0.5;
+			val = (int64_t)value;
+			break;
+		}
+		default:
+			val = parm[0]->data()->getIntVal(row, isNull);
+	}
+	
+	if (val < 0 || val > helpers::TIMESTAMP_MAX_VALUE)
+		return 0;
+
+	DateTime dt;
+
+	struct tm tmp_tm;
+  time_t tmp_t= (time_t)val;
+  localtime_r(&tmp_t, &tmp_tm);
+
+	//to->neg=0;
+	dt.year = (int64_t) ((tmp_tm.tm_year+1900) % 10000);
+	dt.month = (int64_t) tmp_tm.tm_mon+1;
+	dt.day = (int64_t) tmp_tm.tm_mday;
+	dt.hour = (int64_t) tmp_tm.tm_hour;
+	dt.minute = (int64_t) tmp_tm.tm_min;
+	dt.second = (int64_t) tmp_tm.tm_sec;
+	dt.msecond = 0;
+	return dt;
+}
+}
+
+namespace funcexp
+{
+
+CalpontSystemCatalog::ColType Func_from_unixtime::operationType( FunctionParm& fp, CalpontSystemCatalog::ColType& resultType )
+{
+	CalpontSystemCatalog::ColType ct;
+	ct.colDataType = CalpontSystemCatalog::VARCHAR;
+	ct.colWidth = 255;
+	return ct;
+}
+
+string Func_from_unixtime::getStrVal(rowgroup::Row& row,
+							FunctionParm& parm,
+							bool& isNull,
+							CalpontSystemCatalog::ColType&)
+{	
+	DateTime dt = getDateTime(row, parm, isNull);
+	if (*reinterpret_cast<int64_t*>(&dt) == 0)
+	{
+		isNull = true;
+		return "";
+	}
+
+	if (parm.size() == 2)
+	{
+		const string& format = parm[1]->data()->getStrVal(row, isNull);
+		return helpers::IDB_date_format(dt, format);
+	}
+	
+	char buf[256] = {0};
+	DataConvert::datetimeToString(*(reinterpret_cast<int64_t*>(&dt)), buf, 255);
+	return string(buf, 255);
+}
+
+int32_t Func_from_unixtime::getDateIntVal(rowgroup::Row& row,
+							FunctionParm& parm,
+							bool& isNull,
+							CalpontSystemCatalog::ColType& ct)
+{
+	return (((getDatetimeIntVal(row, parm, isNull, ct) >> 32) & 0xFFFFFFC0) | 0x3E);
+}		
+
+int64_t Func_from_unixtime::getDatetimeIntVal(rowgroup::Row& row,
+							FunctionParm& parm,
+							bool& isNull,
+							CalpontSystemCatalog::ColType& ct)
+{
+	DateTime dt = getDateTime(row, parm, isNull);
+	if (*reinterpret_cast<int64_t*>(&dt) == 0)
+	{
+		isNull = true;
+		return 0;
+	}
+	return *reinterpret_cast<int64_t*>(&dt);	
+}
+
+int64_t Func_from_unixtime::getIntVal(rowgroup::Row& row,
+							FunctionParm& parm,
+							bool& isNull,
+							CalpontSystemCatalog::ColType& ct)
+{
+	return getDatetimeIntVal(row, parm, isNull, ct);
+}								
+
+double Func_from_unixtime::getDoubleVal(rowgroup::Row& row,
+									FunctionParm& parm,
+									bool& isNull,
+									CalpontSystemCatalog::ColType& ct)
+{
+	if (parm.size() == 1)
+	{
+		DateTime dt = getDateTime(row, parm, isNull);
+		if (*reinterpret_cast<int64_t*>(&dt) == 0)
+		{
+			isNull = true;
+			return 0;
+		}
+        char buf[32];  // actual string guaranteed to be 22
+        snprintf( buf, 32, "%04d%02d%02d%02d%02d%02d.%06d",
+                  dt.year, dt.month, dt.day, dt.hour,
+				  dt.minute, dt.second, dt.msecond ); 
+		return atof(buf);
+	}
+	
+	return (double) atoi(getStrVal(row, parm, isNull, ct).c_str());
+}
+
+
+} // namespace funcexp
+// vim:ts=4 sw=4: