don't convert WEEK(x) to WEEK(x, @@default_week_format)

mysql-test/r/func_time.result

@@ -874,7 +874,7 @@ explain extended select period_add("9602",-12),period_diff(199505,"9404"),from_d
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
 1	SIMPLE	NULL	NULL	NULL	NULL	NULL	NULL	NULL	NULL	No tables used
 Warnings:
-Note	1003	select period_add('9602',-12) AS `period_add("9602",-12)`,period_diff(199505,'9404') AS `period_diff(199505,"9404")`,from_days(to_days('960101')) AS `from_days(to_days("960101"))`,dayofmonth('1997-01-02') AS `dayofmonth("1997-01-02")`,month('1997-01-02') AS `month("1997-01-02")`,monthname('1972-03-04') AS `monthname("1972-03-04")`,dayofyear('0000-00-00') AS `dayofyear("0000-00-00")`,hour('1997-03-03 23:03:22') AS `HOUR("1997-03-03 23:03:22")`,minute('23:03:22') AS `MINUTE("23:03:22")`,second(230322) AS `SECOND(230322)`,quarter(980303) AS `QUARTER(980303)`,week('1998-03-03',@@default_week_format) AS `WEEK("1998-03-03")`,yearweek('2000-01-01',1) AS `yearweek("2000-01-01",1)`,week(19950101,1) AS `week(19950101,1)`,year('98-02-03') AS `year("98-02-03")`,(weekday(curdate()) - weekday(now())) AS `weekday(curdate())-weekday(now())`,dayname('1962-03-03') AS `dayname("1962-03-03")`,unix_timestamp() AS `unix_timestamp()`,sec_to_time((time_to_sec('0:30:47') / 6.21)) AS `sec_to_time(time_to_sec("0:30:47")/6.21)`,curtime() AS `curtime()`,utc_time() AS `utc_time()`,curdate() AS `curdate()`,utc_date() AS `utc_date()`,utc_timestamp() AS `utc_timestamp()`,date_format('1997-01-02 03:04:05','%M %W %D %Y %y %m %d %h %i %s %w') AS `date_format("1997-01-02 03:04:05", "%M %W %D %Y %y %m %d %h %i %s %w")`,from_unixtime(unix_timestamp('1994-03-02 10:11:12')) AS `from_unixtime(unix_timestamp("1994-03-02 10:11:12"))`,('1997-12-31 23:59:59' + interval 1 second) AS `"1997-12-31 23:59:59" + INTERVAL 1 SECOND`,('1998-01-01 00:00:00' - interval 1 second) AS `"1998-01-01 00:00:00" - INTERVAL 1 SECOND`,('1997-12-31' + interval 1 day) AS `INTERVAL 1 DAY + "1997-12-31"`,extract(year from '1999-01-02 10:11:12') AS `extract(YEAR FROM "1999-01-02 10:11:12")`,('1997-12-31 23:59:59' + interval 1 second) AS `date_add("1997-12-31 23:59:59",INTERVAL 1 SECOND)`
+Note	1003	select period_add('9602',-12) AS `period_add("9602",-12)`,period_diff(199505,'9404') AS `period_diff(199505,"9404")`,from_days(to_days('960101')) AS `from_days(to_days("960101"))`,dayofmonth('1997-01-02') AS `dayofmonth("1997-01-02")`,month('1997-01-02') AS `month("1997-01-02")`,monthname('1972-03-04') AS `monthname("1972-03-04")`,dayofyear('0000-00-00') AS `dayofyear("0000-00-00")`,hour('1997-03-03 23:03:22') AS `HOUR("1997-03-03 23:03:22")`,minute('23:03:22') AS `MINUTE("23:03:22")`,second(230322) AS `SECOND(230322)`,quarter(980303) AS `QUARTER(980303)`,week('1998-03-03') AS `WEEK("1998-03-03")`,yearweek('2000-01-01',1) AS `yearweek("2000-01-01",1)`,week(19950101,1) AS `week(19950101,1)`,year('98-02-03') AS `year("98-02-03")`,(weekday(curdate()) - weekday(now())) AS `weekday(curdate())-weekday(now())`,dayname('1962-03-03') AS `dayname("1962-03-03")`,unix_timestamp() AS `unix_timestamp()`,sec_to_time((time_to_sec('0:30:47') / 6.21)) AS `sec_to_time(time_to_sec("0:30:47")/6.21)`,curtime() AS `curtime()`,utc_time() AS `utc_time()`,curdate() AS `curdate()`,utc_date() AS `utc_date()`,utc_timestamp() AS `utc_timestamp()`,date_format('1997-01-02 03:04:05','%M %W %D %Y %y %m %d %h %i %s %w') AS `date_format("1997-01-02 03:04:05", "%M %W %D %Y %y %m %d %h %i %s %w")`,from_unixtime(unix_timestamp('1994-03-02 10:11:12')) AS `from_unixtime(unix_timestamp("1994-03-02 10:11:12"))`,('1997-12-31 23:59:59' + interval 1 second) AS `"1997-12-31 23:59:59" + INTERVAL 1 SECOND`,('1998-01-01 00:00:00' - interval 1 second) AS `"1998-01-01 00:00:00" - INTERVAL 1 SECOND`,('1997-12-31' + interval 1 day) AS `INTERVAL 1 DAY + "1997-12-31"`,extract(year from '1999-01-02 10:11:12') AS `extract(YEAR FROM "1999-01-02 10:11:12")`,('1997-12-31 23:59:59' + interval 1 second) AS `date_add("1997-12-31 23:59:59",INTERVAL 1 SECOND)`
 SET @TMP='2007-08-01 12:22:49';
 CREATE TABLE t1 (d DATETIME);
 INSERT INTO t1 VALUES ('2007-08-01 12:22:59');

mysql-test/r/set_statement.result

@@ -1152,7 +1152,7 @@ explain extended select week(a) from t1;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
 1	SIMPLE	t1	system	NULL	NULL	NULL	NULL	1	100.00	
 Warnings:
-Note	1003	select week('2000-01-01',@@default_week_format) AS `week(a)` from dual
+Note	1003	select week('2000-01-01') AS `week(a)` from dual
 prepare stmt1 from "select week(a) from t1";
 execute stmt1;
 week(a)

mysql-test/suite/vcol/r/vcol_blocked_sql_funcs.result

@@ -57,7 +57,7 @@ create or replace table t1 (a datetime, b datetime as (utc_timestamp()) PERSISTE
 ERROR HY000: Function or expression 'utc_timestamp()' cannot be used in the GENERATED ALWAYS AS clause of `b`
 # WEEK() - one argument version
 create or replace table t1 (a datetime, b datetime as (week(a)) PERSISTENT);
-ERROR HY000: Function or expression '@@default_week_format' cannot be used in the GENERATED ALWAYS AS clause of `b`
+ERROR HY000: Function or expression 'week()' cannot be used in the GENERATED ALWAYS AS clause of `b`
 # MATCH()
 create or replace table t1 (a varchar(32), b bool as (match a against ('sample text')) PERSISTENT);
 ERROR HY000: Function or expression 'match ... against()' cannot be used in the GENERATED ALWAYS AS clause of `b`

sql/item_timefunc.cc

@@ -1044,13 +1044,15 @@ uint week_mode(uint mode)
 longlong Item_func_week::val_int()
 {
   DBUG_ASSERT(fixed == 1);
-  uint year;
+  uint year, week_format;
   MYSQL_TIME ltime;
   if (get_arg0_date(&ltime, TIME_NO_ZERO_DATE | TIME_NO_ZERO_IN_DATE))
     return 0;
-  return (longlong) calc_week(&ltime,
-			      week_mode((uint) args[1]->val_int()),
-			      &year);
+  if (arg_count > 1)
+    week_format= args[1]->val_int();
+  else
+    week_format= current_thd->variables.default_week_format;
+  return (longlong) calc_week(&ltime, week_mode(week_format), &year);
 }
 
 

sql/item_timefunc.h

@@ -334,6 +334,7 @@ class Item_func_second :public Item_int_func
 class Item_func_week :public Item_int_func
 {
 public:
+  Item_func_week(THD *thd, Item *a): Item_int_func(thd, a) {}
   Item_func_week(THD *thd, Item *a, Item *b): Item_int_func(thd, a, b) {}
   longlong val_int();
   const char *func_name() const { return "week"; }
@@ -343,6 +344,16 @@ class Item_func_week :public Item_int_func
     max_length=2*MY_CHARSET_BIN_MB_MAXLEN;
     maybe_null=1;
   }
+  bool check_vcol_func_processor(void *arg)
+  {
+    if (arg_count == 2)
+      return FALSE;
+    return mark_unsupported_function(func_name(), "()", arg, VCOL_SESSION_FUNC);
+  }
+  bool check_valid_arguments_processor(void *int_arg)
+  {
+    return arg_count == 2;
+  }
   Item *get_copy(THD *thd, MEM_ROOT *mem_root)
   { return get_item_copy<Item_func_week>(thd, mem_root, this); }
 };
@@ -981,7 +992,12 @@ class Item_extract :public Item_int_func
   bool eq(const Item *item, bool binary_cmp) const;
   void print(String *str, enum_query_type query_type);
   bool check_partition_func_processor(void *int_arg) {return FALSE;}
-  bool check_vcol_func_processor(void *arg) { return FALSE;}
+  bool check_vcol_func_processor(void *arg)
+  {
+    if (int_type != INTERVAL_WEEK)
+      return FALSE;
+    return mark_unsupported_function(func_name(), "()", arg, VCOL_SESSION_FUNC);
+  }
   bool check_valid_arguments_processor(void *int_arg)
   {
     switch (int_type) {

sql/sql_yacc.yy

@@ -10022,15 +10022,7 @@ function_call_conflict:
           }
         | WEEK_SYM '(' expr ')'
           {
-            Item *i1;
-            LEX_STRING name= {C_STRING_WITH_LEN("default_week_format")};
-            if (!(i1= get_system_var(thd, OPT_SESSION,
-                                     name, null_lex_str)))
-              MYSQL_YYABORT;
-            i1->set_name(thd, (const char *)
-                         STRING_WITH_LEN("@@default_week_format"),
-                         system_charset_info);
-            $$= new (thd->mem_root) Item_func_week(thd, $3, i1);
+            $$= new (thd->mem_root) Item_func_week(thd, $3);
             if ($$ == NULL)
               MYSQL_YYABORT;
           }