the begginning

dbcon/execplan/arithmeticoperator.cpp

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+/* 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: arithmeticoperator.cpp 9210 2013-01-21 14:10:42Z rdempsey $
+*
+*
+***********************************************************************/
+#include <iostream>
+
+#include "bytestream.h"
+#include "arithmeticoperator.h"
+#include "objectreader.h"
+
+using namespace std;
+
+namespace {
+
+/**@brief util struct for converting string to lower case */
+struct to_lower
+{
+	char operator() (char c) const { return tolower(c); }
+};
+
+//Trim any leading/trailing ws
+const string lrtrim(const string& in)
+{
+	string::size_type p1;
+	p1 = in.find_first_not_of(" \t\n");
+	if (p1 == string::npos) p1 = 0;
+	string::size_type p2;
+	p2 = in.find_last_not_of(" \t\n");
+	if (p2 == string::npos) p2 = in.size() - 1;
+	return string(in, p1, (p2 - p1 + 1));
+}
+
+}
+
+namespace execplan {
+
+/**
+ * Constructors/Destructors
+ */
+ArithmeticOperator::ArithmeticOperator() : Operator()
+{
+}
+
+ArithmeticOperator::ArithmeticOperator(const string& operatorName):Operator(operatorName)
+{
+}
+
+ArithmeticOperator::ArithmeticOperator(const ArithmeticOperator& rhs):Operator(rhs)
+{
+}
+
+ArithmeticOperator:: ~ArithmeticOperator()
+{
+}
+
+/**
+ * Operations
+ */
+
+/**
+ * friend function
+ */
+ostream& operator<<(ostream &output, const ArithmeticOperator& rhs)
+{
+	output << rhs.toString();
+	output << "opType=" << rhs.operationType().colDataType << endl;
+	return output;
+}
+
+/**
+ * The serialization interface
+ */
+void ArithmeticOperator::serialize(messageqcpp::ByteStream& b) const
+{
+	b << (ObjectReader::id_t) ObjectReader::ARITHMETICOPERATOR;
+	Operator::serialize(b);
+}
+
+void ArithmeticOperator::unserialize(messageqcpp::ByteStream& b)
+{
+	ObjectReader::checkType(b, ObjectReader::ARITHMETICOPERATOR);
+	Operator::unserialize(b);
+}
+
+bool ArithmeticOperator::operator==(const ArithmeticOperator& t) const
+{
+	if (fData == t.fData)
+		return true;
+	return false;
+}
+
+bool ArithmeticOperator::operator==(const TreeNode* t) const
+{
+	const ArithmeticOperator *o;
+
+	o = dynamic_cast<const ArithmeticOperator*>(t);
+	if (o == NULL)
+		return false;
+	return *this == *o;
+}
+
+bool ArithmeticOperator::operator!=(const ArithmeticOperator& t) const
+{
+	return (!(*this == t));
+}
+
+bool ArithmeticOperator::operator!=(const TreeNode* t) const
+{
+	return (!(*this == t));
+}
+
+#if 0
+void ArithmeticOperator::operationType(const Type& l, const Type& r)
+{
+	if (l.colDataType == execplan::CalpontSystemCatalog::DECIMAL)
+	{
+		switch (r.colDataType)
+		{
+			case execplan::CalpontSystemCatalog::DECIMAL:
+			{
+				// should follow the result type that MySQL gives
+				fOperationType = fResultType;
+				break;
+			}
+			case execplan::CalpontSystemCatalog::INT:
+			case execplan::CalpontSystemCatalog::MEDINT:
+			case execplan::CalpontSystemCatalog::TINYINT:
+			case execplan::CalpontSystemCatalog::BIGINT:
+				fOperationType.colDataType = execplan::CalpontSystemCatalog::DECIMAL;
+				fOperationType.scale = l.scale;
+				break;
+			default:
+				fOperationType.colDataType = execplan::CalpontSystemCatalog::DOUBLE;
+		}
+	}
+	else if (r.colDataType == execplan::CalpontSystemCatalog::DECIMAL)
+	{
+		switch (l.colDataType)
+		{
+			case execplan::CalpontSystemCatalog::DECIMAL:
+			{
+				// should following the result type that MySQL gives based on the following logic?
+				// @NOTE is this trustable?
+				fOperationType = fResultType;
+				break;
+			}
+			case execplan::CalpontSystemCatalog::INT:
+			case execplan::CalpontSystemCatalog::MEDINT:
+			case execplan::CalpontSystemCatalog::TINYINT:
+			case execplan::CalpontSystemCatalog::BIGINT:
+				fOperationType.colDataType = execplan::CalpontSystemCatalog::DECIMAL;
+				fOperationType.scale = r.scale;
+				break;
+			default:
+				fOperationType.colDataType = execplan::CalpontSystemCatalog::DOUBLE;
+		}
+	}
+	else if ((l.colDataType == execplan::CalpontSystemCatalog::INT ||
+				l.colDataType == execplan::CalpontSystemCatalog::MEDINT ||
+				l.colDataType == execplan::CalpontSystemCatalog::TINYINT ||
+				l.colDataType == execplan::CalpontSystemCatalog::BIGINT) &&
+			   (r.colDataType == execplan::CalpontSystemCatalog::INT ||
+				r.colDataType == execplan::CalpontSystemCatalog::MEDINT ||
+				r.colDataType == execplan::CalpontSystemCatalog::TINYINT ||
+				r.colDataType == execplan::CalpontSystemCatalog::BIGINT))
+		fOperationType.colDataType = execplan::CalpontSystemCatalog::BIGINT;
+	else
+		fOperationType.colDataType = execplan::CalpontSystemCatalog::DOUBLE;
+}
+#endif
+
+void ArithmeticOperator::adjustResultType(const CalpontSystemCatalog::ColType& m)
+{
+	if (m.colDataType != CalpontSystemCatalog::DECIMAL)
+	{
+		fResultType = m;
+	}
+	else
+	{
+		CalpontSystemCatalog::ColType n;
+		n.colDataType = CalpontSystemCatalog::DOUBLE;
+		n.scale = m.scale; // @bug5736, save the original decimal scale
+		n.precision = -1;  // @bug5736, indicate this double is for decimal math
+		n.colWidth = 8;
+		fResultType = n;
+	}
+}
+
+}  // namespace