the begginning

dbcon/execplan/groupconcatcolumn.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: groupconcatcolumn.h 9210 2013-01-21 14:10:42Z rdempsey $
+*
+*
+***********************************************************************/
+/** @file */
+
+#ifndef GROUPCONCATCOLUMN_H
+#define GROUPCONCATCOLUMN_H
+#include <string>
+
+#include "calpontselectexecutionplan.h"
+#include "aggregatecolumn.h"
+
+namespace messageqcpp {
+class ByteStream;
+}
+
+/**
+ * Namespace
+ */
+namespace execplan {
+/**
+ * @brief A class to represent a aggregate return column
+ *
+ * This class is a specialization of class ReturnedColumn that
+ * handles an aggregate function call (e.g., SUM, COUNT, MIN, MAX).
+ */
+class GroupConcatColumn : public AggregateColumn {
+
+public:
+
+	/**
+	 * Constructors
+	 */
+	GroupConcatColumn();
+
+	GroupConcatColumn(const uint32_t sessionID);
+
+	GroupConcatColumn(const GroupConcatColumn& rhs, const uint32_t sessionID=0);
+
+	/**
+	 * Destructors
+	 */
+	virtual ~GroupConcatColumn();
+
+	/**
+	 * Overloaded stream operator
+	 */
+	virtual const std::string toString() const;
+
+	/** return a copy of this pointer
+	 *
+	 * deep copy of this pointer and return the copy
+	 */
+	virtual GroupConcatColumn* clone() const { return new GroupConcatColumn(*this); }
+
+	/**
+	 * Accessors and Mutators
+	 */
+	void orderCols(const std::vector<SRCP>& orderCols) { fOrderCols = orderCols; }
+	std::vector<SRCP>& orderCols() { return fOrderCols; }
+	void separator(const std::string& separator) { fSeparator = separator; }
+	std::string& separator() { return fSeparator; }
+
+	/**
+	 * Serialize 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
+	 */
+	virtual bool operator==(const GroupConcatColumn& 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
+	 */
+	virtual bool operator!=(const GroupConcatColumn& t) const;
+
+private:
+	std::vector<SRCP> fOrderCols;
+	std::string fSeparator;
+};
+
+/**
+* stream operator
+*/
+std::ostream& operator<<(std::ostream& os, const GroupConcatColumn& rhs);
+
+}
+#endif //GROUPCONCATCOLUMN_H
+