WL#1175: more default_week_formats for iso compatibility

New formats added for 'week()' function and 'default_week_format' option(4 - 7).
Next formats is supported now:
*Value* *Meaning*
  `0'     Week starts on Sunday; First Sunday of the year starts week 1.
  	  Week() returns 0-53.
  `1'     Week starts on Monday; Weeks numbered according to ISO 8601:1988.
	  Week() returns 0-53.
  `2'     Week starts on Sunday; First Sunday of the year starts week 1.
  	  Week() returns 1-53.
  `3'     Week starts on Monday; Weeks numbered according to ISO 8601:1988.
	  Week() returns 1-53.
  `4'     Week starts on Sunday; Weeks numbered according to ISO 8601:1988.
	  Week() returns 0-53.
  `5'     Week starts on Monday;  First Monday of the year starts week 1.
  	  Week() returns 0-53.
  `6'     Week starts on Sunday; Weeks numbered according to ISO 8601:1988.
	  Week() returns 1-53.
  `7'     Week starts on Monday;  First Monday of the year starts week 1.
  	  Week() returns 1-53.


mysql-test/r/func_time.result:
  Test for 'default_week_format' option and 'week' function
mysql-test/t/func_time.test:
  Test for 'default_week_format' option and 'week' function
sql/item_timefunc.cc:
  WL#1175 more default_week_formats for iso compatibility
sql/mysql_priv.h:
  WL#1175 more default_week_formats for iso compatibility
sql/mysqld.cc:
  WL#1175 more default_week_formats for iso compatibility
sql/time.cc:
  WL#1175 more default_week_formats for iso compatibility

2 files changed, 37 insertions, 2 deletions

diff --git a/mysql-test/r/func_time.result b/mysql-test/r/func_time.result
index 58a05a2336f..61aa4306c61 100644
--- a/mysql-test/r/func_time.result
+++ b/mysql-test/r/func_time.result
@@ -95,11 +95,34 @@ week(19981231,2)	week(19981231,3)	week(20000101,2)	week(20000101,3)
 52	53	52	52
 select week(20001231,2),week(20001231,3);
 week(20001231,2)	week(20001231,3)
-1	52
+53	52
+select week(19981231,0) as '0', week(19981231,1) as '1', week(19981231,2) as '2', week(19981231,3) as '3', week(19981231,4) as '4', week(19981231,5) as '5', week(19981231,6) as '6', week(19981231,7) as '7';
+0	1	2	3	4	5	6	7
+52	53	52	53	52	52	52	52
+select week(20000101,0) as '0', week(20000101,1) as '1', week(20000101,2) as '2', week(20000101,3) as '3', week(20000101,4) as '4', week(20000101,5) as '5', week(20000101,6) as '6', week(20000101,7) as '7';
+0	1	2	3	4	5	6	7
+0	0	52	52	0	0	52	52
+select week(20000106,0) as '0', week(20000106,1) as '1', week(20000106,2) as '2', week(20000106,3) as '3', week(20000106,4) as '4', week(20000106,5) as '5', week(20000106,6) as '6', week(20000106,7) as '7';
+0	1	2	3	4	5	6	7
+1	1	1	1	1	1	1	1
+select week(20001231,0) as '0', week(20001231,1) as '1', week(20001231,2) as '2', week(20001231,3) as '3', week(20001231,4) as '4', week(20001231,5) as '5', week(20001231,6) as '6', week(20001231,7) as '7';
+0	1	2	3	4	5	6	7
+53	52	53	52	53	52	1	52
+select week(20010101,0) as '0', week(20010101,1) as '1', week(20010101,2) as '2', week(20010101,3) as '3', week(20010101,4) as '4', week(20010101,5) as '5', week(20010101,6) as '6', week(20010101,7) as '7';
+0	1	2	3	4	5	6	7
+0	1	53	1	1	1	1	1
+select yearweek(20001231,0), yearweek(20001231,1), yearweek(20001231,2), yearweek(20001231,3), yearweek(20001231,4), yearweek(20001231,5), yearweek(20001231,6), yearweek(20001231,7);
+yearweek(20001231,0)	yearweek(20001231,1)	yearweek(20001231,2)	yearweek(20001231,3)	yearweek(20001231,4)	yearweek(20001231,5)	yearweek(20001231,6)	yearweek(20001231,7)
+200053	200052	200053	200052	200101	200052	200101	200052
+set default_week_format = 6;
+select week(20001231), week(20001231,6);
+week(20001231)	week(20001231,6)
+1	1
+set default_week_format = 0;
 set default_week_format = 2;
 select week(20001231),week(20001231,2),week(20001231,0);
 week(20001231)	week(20001231,2)	week(20001231,0)
-1	1	53
+53	53	53
 set default_week_format = 0;
 select date_format('1998-12-31','%x-%v'),date_format('1999-01-01','%x-%v');
 date_format('1998-12-31','%x-%v')	date_format('1999-01-01','%x-%v')
diff --git a/mysql-test/t/func_time.test b/mysql-test/t/func_time.test
index a51869e7d76..deb3358da00 100644
--- a/mysql-test/t/func_time.test
+++ b/mysql-test/t/func_time.test
@@ -39,6 +39,18 @@ select yearweek("2000-01-06",1) as '2000', yearweek("2001-01-06",1) as '2001', y
 select week(19981231,2), week(19981231,3), week(20000101,2), week(20000101,3);
 select week(20001231,2),week(20001231,3);
 
+select week(19981231,0) as '0', week(19981231,1) as '1', week(19981231,2) as '2', week(19981231,3) as '3', week(19981231,4) as '4', week(19981231,5) as '5', week(19981231,6) as '6', week(19981231,7) as '7';
+select week(20000101,0) as '0', week(20000101,1) as '1', week(20000101,2) as '2', week(20000101,3) as '3', week(20000101,4) as '4', week(20000101,5) as '5', week(20000101,6) as '6', week(20000101,7) as '7';
+select week(20000106,0) as '0', week(20000106,1) as '1', week(20000106,2) as '2', week(20000106,3) as '3', week(20000106,4) as '4', week(20000106,5) as '5', week(20000106,6) as '6', week(20000106,7) as '7';
+select week(20001231,0) as '0', week(20001231,1) as '1', week(20001231,2) as '2', week(20001231,3) as '3', week(20001231,4) as '4', week(20001231,5) as '5', week(20001231,6) as '6', week(20001231,7) as '7';
+select week(20010101,0) as '0', week(20010101,1) as '1', week(20010101,2) as '2', week(20010101,3) as '3', week(20010101,4) as '4', week(20010101,5) as '5', week(20010101,6) as '6', week(20010101,7) as '7';
+
+select yearweek(20001231,0), yearweek(20001231,1), yearweek(20001231,2), yearweek(20001231,3), yearweek(20001231,4), yearweek(20001231,5), yearweek(20001231,6), yearweek(20001231,7);
+
+set default_week_format = 6;
+select week(20001231), week(20001231,6);
+set default_week_format = 0;
+
 set default_week_format = 2;
 select week(20001231),week(20001231,2),week(20001231,0);
 set default_week_format = 0;