Merge sinisa@bk-internal.mysql.com:/home/bk/mysql-4.1

into sinisa.nasamreza.org:/mnt/work/mysql-4.1

mysql-test/r/cast.result

@@ -33,6 +33,9 @@ cast("2001-1-1" as DATE)	cast("2001-1-1" as DATETIME)
 select cast("1:2:3" as TIME);
 cast("1:2:3" as TIME)
 01:02:03
+select CONVERT("2004-01-22 21:45:33",DATE);
+CONVERT("2004-01-22 21:45:33",DATE)
+2004-01-22
 set names binary;
 select cast(_latin1'test' as char character set latin2);
 cast(_latin1'test' as char character set latin2)

mysql-test/t/cast.test

@@ -13,6 +13,7 @@ select cast(5 as unsigned) -6.0;
 select cast("A" as binary) = "a", cast(BINARY "a" as CHAR) = "A";
 select cast("2001-1-1" as DATE), cast("2001-1-1" as DATETIME);
 select cast("1:2:3" as TIME);
+select CONVERT("2004-01-22 21:45:33",DATE);
 
 #
 # Character set convertion

sql/sql_union.cc

@@ -146,6 +146,7 @@ int st_select_lex_unit::prepare(THD *thd_arg, select_result *sel_result,
 
   for (;sl; sl= sl->next_select())
   {
+    sl->options|=  SELECT_NO_UNLOCK;
     JOIN *join= new JOIN(thd_arg, sl->item_list, 
 			 sl->options | thd_arg->options | additional_options,
 			 tmp_result);

sql/sql_yacc.yy

@@ -664,7 +664,7 @@ bool my_yyoverflow(short **a, YYSTYPE **b,int *yystacksize);
 
 %type <ha_rkey_mode> handler_rkey_mode
 
-%type <cast_type> cast_type cast_type_finalize
+%type <cast_type> cast_type
 
 %type <udf_type> udf_func_type
 
@@ -3082,11 +3082,7 @@ in_sum_expr:
 	  $$= $3;
 	};
 
-cast_type_init:
-	{ Lex->charset= NULL; Lex->length= (char*)0; }
-	;
-
-cast_type_finalize:
+cast_type:
 	BINARY			{ $$=ITEM_CAST_BINARY; }
 	| CHAR_SYM opt_len opt_binary	{ $$=ITEM_CAST_CHAR; }
 	| NCHAR_SYM opt_len	{ $$=ITEM_CAST_CHAR; Lex->charset= national_charset_info; }
@@ -3099,10 +3095,6 @@ cast_type_finalize:
 	| DATETIME		{ $$=ITEM_CAST_DATETIME; }
 	;
 
-cast_type:
-	cast_type_init cast_type_finalize { $$= $2; }
-	;
-
 expr_list:
 	{ Select->expr_list.push_front(new List<Item>); }
 	expr_list2