the begginning

utils/funcexp/func_mod.cpp

@@ -0,0 +1,181 @@
+/* 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_mod.cpp 3616 2013-03-04 14:56:29Z rdempsey $
+*
+*
+****************************************************************************/
+
+#include <string>
+using namespace std;
+
+#include "functor_real.h"
+#include "funchelpers.h"
+#include "functioncolumn.h"
+#include "predicateoperator.h"
+using namespace execplan;
+
+#include "rowgroup.h"
+using namespace rowgroup;
+
+#include "errorcodes.h"
+#include "idberrorinfo.h"
+#include "errorids.h"
+using namespace logging;
+
+
+namespace funcexp
+{
+
+CalpontSystemCatalog::ColType Func_mod::operationType( FunctionParm& fp, CalpontSystemCatalog::ColType& resultType )
+{
+	return resultType;
+}
+
+
+IDB_Decimal Func_mod::getDecimalVal(Row& row,
+									FunctionParm& parm,
+									bool& isNull,
+									CalpontSystemCatalog::ColType& operationColType)
+{
+
+	IDB_Decimal retValue;
+	retValue.value = 0;
+	retValue.scale = 0;
+
+	if ( parm.size() < 2 ) {
+		isNull = true;
+		return retValue;
+	}
+
+	int64_t div = parm[1]->data()->getIntVal(row, isNull);
+
+	if ( div == 0 ) {
+		isNull = true;
+		return retValue;
+	}
+
+	IDB_Decimal d = parm[0]->data()->getDecimalVal(row, isNull);
+	int64_t value = d.value / helpers::power(d.scale);
+	int lefto = d.value % helpers::power(d.scale);
+
+	int64_t mod = (value % div) * helpers::power(d.scale) + lefto;
+
+	retValue.value = mod;
+	retValue.scale = d.scale;
+
+	return retValue;
+}
+
+
+double Func_mod::getDoubleVal(Row& row,
+									FunctionParm& parm,
+									bool& isNull,
+									CalpontSystemCatalog::ColType& operationColType)
+{
+	if ( parm.size() < 2 ) {
+		isNull = true;
+		return 0;
+	}
+
+	int64_t div = parm[1]->data()->getIntVal(row, isNull);
+
+	if ( div == 0 ) {
+		isNull = true;
+		return 0;
+	}
+
+	double mod = 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:
+		{
+			int64_t value = parm[0]->data()->getIntVal(row, isNull);
+
+			mod = value % div;
+		}
+		break;
+
+        case execplan::CalpontSystemCatalog::UBIGINT:
+        case execplan::CalpontSystemCatalog::UINT:
+        case execplan::CalpontSystemCatalog::UMEDINT:
+        case execplan::CalpontSystemCatalog::UTINYINT:
+        case execplan::CalpontSystemCatalog::USMALLINT:
+        {
+            uint64_t udiv = parm[1]->data()->getIntVal(row, isNull);
+            uint64_t uvalue = parm[0]->data()->getUintVal(row, isNull);
+
+            mod = uvalue % udiv;
+        }
+        break;
+
+        case execplan::CalpontSystemCatalog::DOUBLE:
+        case execplan::CalpontSystemCatalog::UDOUBLE:
+		{
+			double value = parm[0]->data()->getDoubleVal(row, isNull);
+
+			mod = fmod(value,div);
+		}
+		break;
+
+		case execplan::CalpontSystemCatalog::FLOAT:
+        case execplan::CalpontSystemCatalog::UFLOAT:
+		{
+			float value = parm[0]->data()->getFloatVal(row, isNull);
+
+			mod = fmod(value,div);
+		}
+		break;
+
+		case execplan::CalpontSystemCatalog::DECIMAL:
+        case execplan::CalpontSystemCatalog::UDECIMAL:
+		{
+			IDB_Decimal d = parm[0]->data()->getDecimalVal(row, isNull);
+			int64_t value = d.value / helpers::power(d.scale);
+
+			mod = value % div;
+		}
+		break;
+		
+		case execplan::CalpontSystemCatalog::CHAR:
+		case execplan::CalpontSystemCatalog::VARCHAR:
+		{
+			double value = parm[0]->data()->getDoubleVal(row, isNull);
+			mod = fmod(value,div);
+			break;
+		}
+
+		default:
+		{
+			std::ostringstream oss;
+			oss << "mod: datatype of " << execplan::colDataTypeToString(parm[0]->data()->resultType().colDataType);
+			throw logging::IDBExcept(oss.str(), ERR_DATATYPE_NOT_SUPPORT);
+		}
+	}
+
+	return mod;
+}
+
+
+} // namespace funcexp
+// vim:ts=4 sw=4: