/**************************************************************
 * 
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 * 
 *   http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 * 
 *************************************************************/


#ifndef _CONNECTIVITY_FILE_FDATEFUNCTIONS_HXX_
#define _CONNECTIVITY_FILE_FDATEFUNCTIONS_HXX_

#include "file/fcode.hxx"
#include "file/filedllapi.hxx"

namespace connectivity
{
	class OSQLParseNode;
	namespace file
	{
		/** DAYOFWEEK(date)
			Returns the weekday index for date (1 = Sunday, 2 = Monday, ... 7 = Saturday). These index values correspond to the ODBC standard.

		> SELECT DAYOFWEEK('1998-02-03');
				-> 3
		*/
		class OOp_DayOfWeek : public OUnaryOperator
		{
		protected:
			virtual ORowSetValue operate(const ORowSetValue& lhs) const;
		};

		/** DAYOFMONTH(date)
			Returns the day of the month for date, in the range 1 to 31:

		> SELECT DAYOFMONTH('1998-02-03');
				-> 3
		*/
		class OOp_DayOfMonth : public OUnaryOperator
		{
		protected:
			virtual ORowSetValue operate(const ORowSetValue& lhs) const;
		};

		/** DAYOFYEAR(date)
			Returns the day of the year for date, in the range 1 to 366:

		> SELECT DAYOFYEAR('1998-02-03');
				-> 34

		*/
		class OOp_DayOfYear : public OUnaryOperator
		{
		protected:
			virtual ORowSetValue operate(const ORowSetValue& lhs) const;
		};

		/** MONTH(date)
			Returns the month for date, in the range 1 to 12:

		> SELECT MONTH('1998-02-03');
				-> 2
		*/
		class OOp_Month : public OUnaryOperator
		{
		protected:
			virtual ORowSetValue operate(const ORowSetValue& lhs) const;
		};

		/** DAYNAME(date)
			Returns the name of the weekday for date:

		> SELECT DAYNAME('1998-02-05');
				-> 'Thursday'

		*/
		class OOp_DayName : public OUnaryOperator
		{
		protected:
			virtual ORowSetValue operate(const ORowSetValue& lhs) const;
		};

		/** MONTHNAME(date)
			Returns the name of the month for date:

		> SELECT MONTHNAME('1998-02-05');
				-> 'February'

		*/
		class OOp_MonthName : public OUnaryOperator
		{
		protected:
			virtual ORowSetValue operate(const ORowSetValue& lhs) const;
		};

		/** QUARTER(date)
			Returns the quarter of the year for date, in the range 1 to 4:

		> SELECT QUARTER('98-04-01');
				-> 2

		*/
		class OOp_Quarter : public OUnaryOperator
		{
		protected:
			virtual ORowSetValue operate(const ORowSetValue& lhs) const;
		};

		/** WEEK(date)
			WEEK(date,first)
				With a single argument, returns the week for date, in the range 0 to 53 (yes, there may be the beginnings of a week 53), for locations where Sunday is the first day of the week. The two-argument form of WEEK() allows you to specify whether the week starts on Sunday or Monday and whether the return value should be in the range 0-53 or 1-52. Here is a table for how the second argument works:
				Value 	Meaning
				0 	Week starts on Sunday and return value is in range 0-53
				1 	Week starts on Monday and return value is in range 0-53
				2 	Week starts on Sunday and return value is in range 1-53
				3 	Week starts on Monday and return value is in range 1-53 (ISO 8601)

			> SELECT WEEK('1998-02-20');
					-> 7
			> SELECT WEEK('1998-02-20',0);
					-> 7
			> SELECT WEEK('1998-02-20',1);
					-> 8
			> SELECT WEEK('1998-12-31',1);
					-> 53

		*/
		class OOp_Week : public ONthOperator
		{
		protected:
			virtual ORowSetValue operate(const ::std::vector<ORowSetValue>& lhs) const;
		};

		/** YEAR(date)
			Returns the year for date, in the range 1000 to 9999:

		> SELECT YEAR('98-02-03');
				-> 1998
		*/
		class OOp_Year : public OUnaryOperator
		{
		protected:
			virtual ORowSetValue operate(const ORowSetValue& lhs) const;
		};

		/** HOUR(time)
			Returns the hour for time, in the range 0 to 23:

		> SELECT HOUR('10:05:03');
				-> 10
		*/
        class OOp_Hour : public OUnaryOperator
		{
		protected:
			virtual ORowSetValue operate(const ORowSetValue& lhs) const;
		};

		/** MINUTE(time)
			Returns the minute for time, in the range 0 to 59:

		> SELECT MINUTE('98-02-03 10:05:03');
				-> 5

		*/
		class OOp_Minute : public OUnaryOperator
		{
		protected:
			virtual ORowSetValue operate(const ORowSetValue& lhs) const;
		};

		/** SECOND(time)
			Returns the second for time, in the range 0 to 59:

		> SELECT SECOND('10:05:03');
				-> 3
		*/
		class OOp_Second : public OUnaryOperator
		{
		protected:
			virtual ORowSetValue operate(const ORowSetValue& lhs) const;
		};

		/** CURDATE()
			CURRENT_DATE
				Returns today's date as a value in 'YYYY-MM-DD' or YYYYMMDD format, depending on whether the function is used in a string or numeric context:

			> SELECT CURDATE();
					-> '1997-12-15'
		*/
		class OOp_CurDate : public ONthOperator
		{
		protected:
			virtual ORowSetValue operate(const ::std::vector<ORowSetValue>& lhs) const;
		};

		/** CURTIME()
			CURRENT_TIME
				Returns the current time as a value in 'HH:MM:SS' or HHMMSS format, depending on whether the function is used in a string or numeric context:

			> SELECT CURTIME();
					-> '23:50:26'
		*/
		class OOp_CurTime : public ONthOperator
		{
		protected:
			virtual ORowSetValue operate(const ::std::vector<ORowSetValue>& lhs) const;
		};

		/** NOW()
			Returns the current date and time as a value in 'YYYY-MM-DD HH:MM:SS' or YYYYMMDDHHMMSS format, depending on whether the function is used in a string or numeric context:

			> SELECT NOW();
					-> '1997-12-15 23:50:26'
		*/
		class OOp_Now : public ONthOperator
		{
		protected:
			virtual ORowSetValue operate(const ::std::vector<ORowSetValue>& lhs) const;
		};
	}
}

#endif // _CONNECTIVITY_FILE_FCODE_HXX_