Bug#30234: Unexpected behavior using DELETE with AS and USING

Anti-patch. This patch undoes the previously pushed patch. It is 
null-merged in versions 5.1 and above since there the original 
patch is still desired.

mysql-test/r/delete.result

@@ -234,40 +234,3 @@ ERROR 42S22: Unknown column 't2.x' in 'order clause'
 DELETE FROM t1 ORDER BY (SELECT x);
 ERROR 42S22: Unknown column 'x' in 'field list'
 DROP TABLE t1;
-CREATE TABLE t1 (
-a INT
-);
-CREATE TABLE t2 (
-a INT
-);
-CREATE DATABASE db1;
-CREATE TABLE db1.t1 (
-a INT
-);
-INSERT INTO db1.t1 (a) SELECT * FROM t1;
-CREATE DATABASE db2;
-CREATE TABLE db2.t1 (
-a INT
-);
-INSERT INTO db2.t1 (a) SELECT * FROM t2;
-DELETE FROM t1 alias USING t1, t2 alias WHERE t1.a = alias.a;
-ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'alias USING t1, t2 alias WHERE t1.a = alias.a' at line 1
-DELETE FROM alias USING t1, t2 alias WHERE t1.a = alias.a;
-DELETE FROM t1, alias USING t1, t2 alias WHERE t1.a = alias.a;
-DELETE FROM t1, t2 USING t1, t2 alias WHERE t1.a = alias.a;
-ERROR 42S02: Unknown table 't2' in MULTI DELETE
-DELETE FROM db1.t1 alias USING db1.t1, db2.t1 alias WHERE db1.t1.a = alias.a;
-ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'alias USING db1.t1, db2.t1 alias WHERE db1.t1.a = alias.a' at line 1
-DELETE FROM alias USING db1.t1, db2.t1 alias WHERE db1.t1.a = alias.a;
-ERROR 42S02: Unknown table 'alias' in MULTI DELETE
-DELETE FROM db2.alias USING db1.t1, db2.t1 alias WHERE db1.t1.a = alias.a;
-DELETE FROM t1 USING t1 WHERE a = 1;
-SELECT * FROM t1;
-a
-DELETE FROM t1 alias USING t1 alias WHERE a = 2;
-ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'alias USING t1 alias WHERE a = 2' at line 1
-SELECT * FROM t1;
-a
-DROP TABLE t1, t2;
-DROP DATABASE db1;
-DROP DATABASE db2;

mysql-test/t/delete.test

@@ -233,47 +233,3 @@ DELETE FROM t1 ORDER BY t2.x;
 DELETE FROM t1 ORDER BY (SELECT x);
 
 DROP TABLE t1;
-
-#
-# Bug #30234: Unexpected behavior using DELETE with AS and USING
-# '
-CREATE TABLE t1 (
-  a INT
-);
-
-CREATE TABLE t2 (
-  a INT
-);
-
-CREATE DATABASE db1;
-CREATE TABLE db1.t1 (
-  a INT
-);
-INSERT INTO db1.t1 (a) SELECT * FROM t1;
-
-CREATE DATABASE db2;
-CREATE TABLE db2.t1 (
-  a INT
-);
-INSERT INTO db2.t1 (a) SELECT * FROM t2;
-
---error ER_PARSE_ERROR
-DELETE FROM t1 alias USING t1, t2 alias WHERE t1.a = alias.a;
-DELETE FROM alias USING t1, t2 alias WHERE t1.a = alias.a;
-DELETE FROM t1, alias USING t1, t2 alias WHERE t1.a = alias.a;
---error ER_UNKNOWN_TABLE
-DELETE FROM t1, t2 USING t1, t2 alias WHERE t1.a = alias.a;
---error ER_PARSE_ERROR
-DELETE FROM db1.t1 alias USING db1.t1, db2.t1 alias WHERE db1.t1.a = alias.a;
---error ER_UNKNOWN_TABLE
-DELETE FROM alias USING db1.t1, db2.t1 alias WHERE db1.t1.a = alias.a;
-DELETE FROM db2.alias USING db1.t1, db2.t1 alias WHERE db1.t1.a = alias.a;
-DELETE FROM t1 USING t1 WHERE a = 1;
-SELECT * FROM t1;
---error ER_PARSE_ERROR
-DELETE FROM t1 alias USING t1 alias WHERE a = 2;
-SELECT * FROM t1;
-
-DROP TABLE t1, t2;
-DROP DATABASE db1;
-DROP DATABASE db2;

sql/sql_yacc.yy

@@ -1162,8 +1162,7 @@ bool my_yyoverflow(short **a, YYSTYPE **b, ulong *yystacksize);
 	field_opt_list opt_binary table_lock_list table_lock
 	ref_list opt_on_delete opt_on_delete_list opt_on_delete_item use
 	opt_delete_options opt_delete_option varchar nchar nvarchar
-	opt_outer table_list table_name table_alias_ref_list table_alias_ref
-	opt_option opt_place
+	opt_outer table_list table_name opt_option opt_place
 	opt_attribute opt_attribute_list attribute column_list column_list_id
 	opt_column_list grant_privileges grant_ident grant_list grant_option
 	object_privilege object_privilege_list user_list rename_list
@@ -6554,20 +6553,6 @@ table_name:
 	}
 	;
 
-table_alias_ref_list:
-        table_alias_ref
-        | table_alias_ref_list ',' table_alias_ref;
-
-table_alias_ref:
-	table_ident
-	{
-	  if (!Select->add_table_to_list(YYTHD, $1, NULL,
-                                         TL_OPTION_UPDATING | TL_OPTION_ALIAS,
-                                         Lex->lock_option ))
-	    MYSQL_YYABORT;
-	}
-	;
-
 if_exists:
 	/* empty */ { $$= 0; }
 	| IF EXISTS { $$= 1; }
@@ -6838,7 +6823,7 @@ single_multi:
             if (multi_delete_set_locks_and_link_aux_tables(Lex))
               MYSQL_YYABORT;
           }
-	| FROM table_alias_ref_list
+	| FROM table_wild_list
 	  { mysql_init_multi_delete(Lex); }
 	  USING join_table_list where_clause
           {