the begginning

dbcon/execplan/intervalcolumn.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: intervalcolumn.h 9679 2013-07-11 22:32:03Z zzhu $
+*
+*
+***********************************************************************/
+
+/** @file */
+
+#ifndef INTERVALCOLUMN_H
+#define INTERVALCOLUMN_H
+#include <string>
+#include <iosfwd>
+#include <vector>
+
+#include "returnedcolumn.h"
+#include "functor.h"
+
+namespace messageqcpp {
+class ByteStream;
+}
+
+/**
+ * Namespace
+ */
+namespace execplan { 
+/**
+ * @brief A class to represent a functional column
+ * 
+ * This class is a specialization of class ReturnedColumn that
+ * handles a window function.
+ */
+class IntervalColumn : public ReturnedColumn {
+
+public:
+	
+	/* from my_time.h */
+	enum interval_type
+	{
+	  INTERVAL_YEAR, INTERVAL_QUARTER, INTERVAL_MONTH, INTERVAL_WEEK, INTERVAL_DAY,
+	  INTERVAL_HOUR, INTERVAL_MINUTE, INTERVAL_SECOND, INTERVAL_MICROSECOND,
+	  INTERVAL_YEAR_MONTH, INTERVAL_DAY_HOUR, INTERVAL_DAY_MINUTE,
+	  INTERVAL_DAY_SECOND, INTERVAL_HOUR_MINUTE, INTERVAL_HOUR_SECOND,
+	  INTERVAL_MINUTE_SECOND, INTERVAL_DAY_MICROSECOND, INTERVAL_HOUR_MICROSECOND,
+	  INTERVAL_MINUTE_MICROSECOND, INTERVAL_SECOND_MICROSECOND, INTERVAL_LAST
+	};
+	
+	IntervalColumn();
+	IntervalColumn(SRCP&, int);
+	IntervalColumn(const IntervalColumn& rhs, const uint32_t sessionID = 0);
+	virtual ~IntervalColumn() {}
+	const SRCP& val() const 
+	{
+		return fVal;
+	}
+	void val(const SRCP& val)
+	{
+		fVal = val;
+	}
+	const int intervalType() const
+	{
+		return fIntervalType;
+	}
+	void intervalType(int intervalType)
+	{
+		fIntervalType = intervalType;
+	}
+	const std::string toString() const;
+	inline virtual IntervalColumn* clone() const
+	{
+		return new IntervalColumn (*this);
+	}
+	
+	virtual bool hasAggregate() {return false;}
+	virtual bool hasWindowFunc() {return false;}
+	
+private:
+	/**
+	 * Fields
+	 */
+	SRCP fVal;
+	int fIntervalType;
+
+	// okay to be private for now.
+	virtual bool operator==(const TreeNode* t) const { return false; }
+	bool operator==(const IntervalColumn& t) const;
+	virtual bool operator!=(const TreeNode* t) const { return false; }
+	bool operator!=(const IntervalColumn& t) const;
+};
+
+/**
+* ostream operator
+*/
+std::ostream& operator<<(std::ostream& output, const IntervalColumn& rhs);
+
+} 
+#endif //INTERVALCOLUMN_H