the begginning

utils/funcexp/func_time.cpp

@@ -0,0 +1,142 @@
+/* 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_time.cpp 3495 2013-01-21 14:09:51Z rdempsey $
+*
+*
+****************************************************************************/
+
+#include <cstdlib>
+#include <string>
+#include <sstream>
+using namespace std;
+
+#include "functor_dtm.h"
+#include "functioncolumn.h"
+#include "rowgroup.h"
+using namespace execplan;
+
+#include "dataconvert.h"
+
+namespace funcexp
+{
+
+CalpontSystemCatalog::ColType Func_time::operationType( FunctionParm& fp, CalpontSystemCatalog::ColType& resultType )
+{
+	CalpontSystemCatalog::ColType ct;
+	ct.colDataType = CalpontSystemCatalog::VARCHAR;
+	ct.colWidth = 255;
+	return ct;
+}
+
+string Func_time::getStrVal(rowgroup::Row& row,
+							FunctionParm& parm,
+							bool& isNull,
+							CalpontSystemCatalog::ColType&)
+{
+	int64_t val = 0;
+	switch (parm[0]->data()->resultType().colDataType)
+	{
+		case execplan::CalpontSystemCatalog::BIGINT:
+		case execplan::CalpontSystemCatalog::INT:
+		case execplan::CalpontSystemCatalog::MEDINT:
+		case execplan::CalpontSystemCatalog::TINYINT:
+		case execplan::CalpontSystemCatalog::SMALLINT:
+		{
+			val = dataconvert::DataConvert::intToDatetime(parm[0]->data()->getIntVal(row, isNull));
+			if (val == -1)
+				isNull = true;
+			//else
+		//		return *(reinterpret_cast<uint64_t*>(&val));
+			break;
+		}
+		case execplan::CalpontSystemCatalog::DECIMAL:
+		{
+			if (parm[0]->data()->resultType().scale)
+			{
+				val = dataconvert::DataConvert::intToDatetime(parm[0]->data()->getIntVal(row, isNull));
+				if (val == -1)
+					isNull = true;
+				//else
+				//	return *(reinterpret_cast<uint64_t*>(&val));
+			}
+			break;
+		}
+		case execplan::CalpontSystemCatalog::DOUBLE:
+		case execplan::CalpontSystemCatalog::FLOAT:
+		{
+			isNull = true;
+			break;
+		}
+		case execplan::CalpontSystemCatalog::VARCHAR:
+		case execplan::CalpontSystemCatalog::CHAR:
+		{
+			val = dataconvert::DataConvert::stringToDatetime(parm[0]->data()->getStrVal(row, isNull));
+			if (val == -1)
+				isNull = true;
+			//else
+			//	return *(reinterpret_cast<uint64_t*>(&val));
+			break;
+		}
+		case execplan::CalpontSystemCatalog::DATE:
+		{
+			val = parm[0]->data()->getDatetimeIntVal(row, isNull);
+			break;
+		}
+		case execplan::CalpontSystemCatalog::DATETIME:
+		{
+			val = parm[0]->data()->getDatetimeIntVal(row, isNull);
+			break;
+		}
+		default:
+		{
+			isNull = true;
+		}
+	}
+	if (isNull)
+		return "";
+	
+	char buf[30] = {'\0'};
+	dataconvert::DataConvert::datetimeToString(val, buf, sizeof(buf));
+	string time(buf);
+	return time.substr(11,80);
+}
+
+int64_t Func_time::getIntVal(rowgroup::Row& row,
+						FunctionParm& fp,
+						bool& isNull,
+						execplan::CalpontSystemCatalog::ColType& op_ct)
+{
+	return dataconvert::DataConvert::datetimeToInt(getStrVal(row, fp, isNull, op_ct));
+}
+							
+double Func_time::getDoubleVal(rowgroup::Row& row,
+						FunctionParm& fp,
+						bool& isNull,
+						execplan::CalpontSystemCatalog::ColType& op_ct)
+{
+	// convert time value to int followiing mysql. e.g. 23:34:34 => 233434
+	int64_t datetimevalue = dataconvert::DataConvert::stringToDatetime(fp[0]->data()->getStrVal(row, isNull));
+	return ((unsigned)((datetimevalue >> 32) & 0x3f)) * 10000 +
+					((unsigned)((datetimevalue >> 26) & 0x3f)) * 100 +
+					(unsigned)((datetimevalue >> 20) & 0x3f);
+}
+
+
+} // namespace funcexp
+// vim:ts=4 sw=4: