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dbcon/execplan/operator.h

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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: operator.h 9635 2013-06-19 21:42:30Z bwilkinson $
+*
+*
+***********************************************************************/
+/** @file */
+
+#ifndef OPERATOR_H
+#define OPERATOR_H
+#include <string>
+#include <iosfwd>
+#include <boost/shared_ptr.hpp>
+
+#include "treenode.h"
+
+namespace messageqcpp {
+class ByteStream;
+}
+
+namespace execplan { 
+	class ParseTree;
+	class ReturnedColumn;
+		
+	enum OpType
+	{
+		OP_ADD = 0,
+		OP_SUB,
+		OP_MUL,
+		OP_DIV,
+		OP_EQ,
+		OP_NE,
+		OP_GT,
+		OP_GE,
+		OP_LT,
+		OP_LE,
+		OP_LIKE,
+		OP_NOTLIKE,
+		OP_AND,
+		OP_OR,
+		OP_ISNULL,
+		OP_ISNOTNULL,
+		OP_BETWEEN,
+		OP_NOTBETWEEN,
+		OP_IN,
+		OP_NOTIN,
+		OP_XOR,
+		OP_UNKNOWN,
+	};
+	
+class Operator : public TreeNode {
+
+public:
+	Operator();
+	Operator(const std::string& operatorName);
+	Operator(const Operator& rhs);
+	
+	virtual ~Operator();
+	
+	virtual const std::string toString() const;
+	virtual const std::string data() const { return fData; }
+	virtual void data(const std::string data);
+	
+  /** return a copy of this pointer
+	 *
+	 * deep copy of this pointer and return the copy
+	 */	
+	inline virtual Operator* clone() const
+	{
+	    return new Operator (*this);
+	}
+	
+	/** return the opposite operator
+	 * @note this is not a compliment of operator. this is for the case that
+	 * the two operands of operator get switched, and the operator needs to
+	 * be reversed. e.g., where C1 > C2 ==> where C2 < C1
+	 */
+	virtual Operator* opposite() const;
+	
+	/**
+	 * The serialization interface
+	 */
+	virtual void serialize(messageqcpp::ByteStream&) const;
+	virtual void unserialize(messageqcpp::ByteStream&);
+
+	/** @brief Do a deep, strict (as opposed to semantic) equivalence test
+	 *
+	 * Do a deep, strict (as opposed to semantic) equivalence test.
+	 * @return true iff every member of t is a duplicate copy of every member of this; false otherwise
+		 */
+	virtual bool operator==(const TreeNode* t) const;
+	
+	/** @brief Do a deep, strict (as opposed to semantic) equivalence test
+	 *
+	 * Do a deep, strict (as opposed to semantic) equivalence test.
+	 * @return true iff every member of t is a duplicate copy of every member of this; false otherwise
+	 */
+	bool operator==(const Operator& t) const;
+	
+	/** @brief Do a deep, strict (as opposed to semantic) equivalence test
+	 *
+	 * Do a deep, strict (as opposed to semantic) equivalence test.
+	 * @return false iff every member of t is a duplicate copy of every member of this; true otherwise
+	 */
+	virtual bool operator!=(const TreeNode* t) const;
+	 
+	/** @brief Do a deep, strict (as opposed to semantic) equivalence test
+	 *
+	 * Do a deep, strict (as opposed to semantic) equivalence test.
+	 * @return false iff every member of t is a duplicate copy of every member of this; true otherwise
+	 */
+	bool operator!=(const Operator& t) const;
+	
+	/** @breif reverse the operator
+	 * 
+	 * Literally reverse the operator, as left operand and right operand are swapped, or a NOT 
+	 * is applied before the operator
+	 */
+	virtual void reverseOp();
+
+protected:
+	std::string fData;	
+		
+	/***********************************************************
+	 *                  F&E framework                          *
+	 ***********************************************************/
+public:	 
+	virtual const OpType op() const { return fOp; }
+	virtual void op(const OpType op) { fOp = op; }
+	virtual void evaluate(rowgroup::Row& row, bool& isNull, ParseTree* lop, ParseTree* rop) {}
+	
+	// The following methods should be pure virtual. Currently too many instanslization exists.
+	virtual const std::string& getStrVal(rowgroup::Row& row, bool& isNull, ParseTree* lop, ParseTree* rop) { return fResult.strVal; }
+	virtual int64_t getIntVal(rowgroup::Row& row, bool& isNull, ParseTree* lop, ParseTree* rop) { return fResult.intVal; }
+    virtual uint64_t getUintVal(rowgroup::Row& row, bool& isNull, ParseTree* lop, ParseTree* rop) { return fResult.uintVal; }
+	virtual float getFloatVal(rowgroup::Row& row, bool& isNull, ParseTree* lop, ParseTree* rop) { return fResult.floatVal; }
+	virtual double getDoubleVal(rowgroup::Row& row, bool& isNull, ParseTree* lop, ParseTree* rop) { return fResult.doubleVal; }
+	virtual IDB_Decimal getDecimalVal(rowgroup::Row& row, bool& isNull, ParseTree* lop, ParseTree* rop) { return fResult.decimalVal; }
+	virtual int32_t getDateIntVal(rowgroup::Row& row, bool& isNull, ParseTree* lop, ParseTree* rop) { return fResult.intVal; }
+	virtual int64_t getDatetimeIntVal(rowgroup::Row& row, bool& isNull, ParseTree* lop, ParseTree* rop) { return fResult.intVal; }
+	virtual bool getBoolVal(rowgroup::Row& row, bool& isNull, ParseTree* lop, ParseTree* rop) { return fResult.boolVal; }
+	virtual bool getBoolVal(rowgroup::Row& row, bool& isNull, ReturnedColumn* lop, ReturnedColumn* rop) { return fResult.boolVal; }
+		
+	virtual void setOpType(Type& l, Type& r) {}
+	virtual void operationType(const Type& ot) { fOperationType = ot; }
+	virtual const Type& operationType() const { return fOperationType; }
+		
+protected:
+	OpType fOp;	
+};
+
+typedef boost::shared_ptr<Operator> SOP;
+
+std::ostream& operator<<(std::ostream& os, const Operator& rhs);
+} 
+
+
+#endif //OPERATOR_H
+