the begginning

dbcon/execplan/pseudocolumn.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: simplecolumn.h 9679 2013-07-11 22:32:03Z zzhu $
+*
+*
+***********************************************************************/
+/** @file */
+
+#ifndef PSEUDOCOLUMN_H
+#define PSEUDOCOLUMN_H
+#include <string>
+#include "simplecolumn.h"
+
+namespace messageqcpp {
+class ByteStream;
+}
+
+/**
+ * Namespace
+ */
+namespace execplan {
+
+const uint32_t PSEUDO_UNKNOWN = 0;
+const uint32_t PSEUDO_EXTENTRELATIVERID = 1;
+const uint32_t PSEUDO_DBROOT = 2;
+const uint32_t PSEUDO_PM = 3;
+const uint32_t PSEUDO_SEGMENT = 4;
+const uint32_t PSEUDO_SEGMENTDIR = 5;
+const uint32_t PSEUDO_EXTENTMIN = 6;
+const uint32_t PSEUDO_EXTENTMAX = 7;
+const uint32_t PSEUDO_BLOCKID = 8;
+const uint32_t PSEUDO_EXTENTID = 9;
+const uint32_t PSEUDO_PARTITION = 10;
+const uint32_t PSEUDO_LOCALPM = 11;
+
+/**
+ * @brief A class to represent a pseudo column
+ *
+ * This class is a specialization of class SimpleColumn that handles
+ * a pseudocolumn.
+ */
+class PseudoColumn : public SimpleColumn {
+
+public:
+
+	/**
+	 * Constructors
+	 */
+	PseudoColumn();
+	PseudoColumn(const uint32_t pseudoType);
+	PseudoColumn(const std::string& token,
+	             const uint32_t pseudoType,
+	             const uint32_t sessionID = 0);
+	PseudoColumn(const std::string& schema,
+	             const std::string& table,
+	             const std::string& col,
+	             const uint32_t pseudoType,
+	             const uint32_t sessionID = 0);
+	PseudoColumn(const std::string& schema,
+	             const std::string& table,
+	             const std::string& col,
+	             const bool isInfiniDB,
+	             const uint32_t pseudoType,
+	             const uint32_t sessionID = 0);
+	PseudoColumn(const SimpleColumn& rhs, const uint32_t pseudoType, const uint32_t sessionID = 0);
+	PseudoColumn(const PseudoColumn& rhs, const uint32_t sessionID = 0);
+
+	/**
+	 * Destructor
+	 */
+	virtual ~PseudoColumn();
+
+	/** return a copy of this pointer
+	 *
+	 * deep copy of this pointer and return the copy
+	 */
+	inline virtual PseudoColumn* clone() const
+	{
+		return new PseudoColumn (*this);
+	}
+	
+	/**
+	 * Overloaded assignment operator
+	 */
+	PseudoColumn& operator=(const PseudoColumn& rhs);
+	
+	/**
+	 * Accessor and mutator
+	 */
+	const uint32_t pseudoType() const
+	{
+		return fPseudoType;
+	}
+	
+	void pseudoType (const uint32_t pseudoType)
+	{
+		fPseudoType = pseudoType;
+	}
+	
+	/**
+	 * The serialize interface
+	 */
+	virtual void serialize(messageqcpp::ByteStream&) const;
+	virtual void unserialize(messageqcpp::ByteStream&);
+
+	virtual const std::string toString() 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
+	 */
+	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 PseudoColumn& 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 PseudoColumn& t) const;
+	
+	static uint32_t pseudoNameToType(std::string& name);
+
+
+private:
+	/**
+	 * Fields
+	 */
+	uint32_t fPseudoType;
+	void adjustResultType();
+};
+
+} // namespace execplan
+
+#endif //PSEUDOCOLUMN_H
+