diff --git a/mysql-test/r/subselect.result b/mysql-test/r/subselect.result index bfacfc86eef..352519badcd 100644 --- a/mysql-test/r/subselect.result +++ b/mysql-test/r/subselect.result @@ -3558,22 +3558,19 @@ SELECT sql_no_cache * FROM t1 WHERE NOT EXISTS (SELECT i FROM t1) UNION (SELECT i FROM t1) ); -i +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 'UNION +(SELECT i FROM t1) +)' at line 3 SELECT * FROM t1 WHERE NOT EXISTS (((SELECT i FROM t1) UNION (SELECT i FROM t1))); -i +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 'UNION (SELECT i FROM t1)))' at line 2 explain select ((select t11.i from t1 t11) union (select t12.i from t1 t12)) from t1; 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 'union (select t12.i from t1 t12)) from t1' at line 1 explain select * from t1 where not exists ((select t11.i from t1 t11) union (select t12.i from t1 t12)); -id select_type table type possible_keys key key_len ref rows Extra -1 PRIMARY t1 system NULL NULL NULL NULL 0 const row not found -2 SUBQUERY NULL NULL NULL NULL NULL NULL NULL No tables used -3 SUBQUERY NULL NULL NULL NULL NULL NULL NULL no matching row in const table -4 UNION t12 system NULL NULL NULL NULL 0 const row not found -NULL UNION RESULT ALL NULL NULL NULL NULL NULL +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 'union (select t12.i from t1 t12))' at line 2 DROP TABLE t1; CREATE TABLE t1 (a VARCHAR(250), b INT auto_increment, PRIMARY KEY (b)); insert into t1 (a) values (FLOOR(rand() * 100)); @@ -4150,4 +4147,26 @@ SELECT ((a1,a2) IN (SELECT * FROM t2 WHERE b2 > 0)) IS NULL FROM t1; 0 0 DROP TABLE t1, t2; +CREATE TABLE t1 (a INT); +CREATE TABLE t2 (a INT); +INSERT INTO t1 VALUES (1),(2); +INSERT INTO t2 VALUES (1),(2); +SELECT 2 FROM t1 WHERE EXISTS ((SELECT 1 FROM t2 WHERE t1.a=t2.a)); +2 +2 +2 +EXPLAIN EXTENDED +SELECT 2 FROM t1 WHERE EXISTS ((SELECT 1 FROM t2 WHERE t1.a=t2.a)); +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1 ALL NULL NULL NULL NULL 2 Using where +2 DEPENDENT SUBQUERY t2 ALL NULL NULL NULL NULL 2 Using where +Warnings: +Note 1276 Field or reference 'test.t1.a' of SELECT #2 was resolved in SELECT #1 +Note 1003 select 2 AS `2` from `test`.`t1` where exists(select 1 AS `1` from `test`.`t2` where (`test`.`t1`.`a` = `test`.`t2`.`a`)) +EXPLAIN EXTENDED +SELECT 2 FROM t1 WHERE EXISTS ((SELECT 1 FROM t2 WHERE t1.a=t2.a) UNION +(SELECT 1 FROM t2 WHERE t1.a = t2.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 'UNION +(SELECT 1 FROM t2 WHERE t1.a = t2.a))' at line 2 +DROP TABLE t1,t2; End of 5.0 tests. diff --git a/mysql-test/t/subselect.test b/mysql-test/t/subselect.test index b5279331a5f..43e8c2532bf 100644 --- a/mysql-test/t/subselect.test +++ b/mysql-test/t/subselect.test @@ -2448,12 +2448,16 @@ DROP TABLE t1, t2; CREATE TABLE t1 (i INT); (SELECT i FROM t1) UNION (SELECT i FROM t1); +#TODO:not supported +--error ER_PARSE_ERROR SELECT sql_no_cache * FROM t1 WHERE NOT EXISTS ( (SELECT i FROM t1) UNION (SELECT i FROM t1) ); +#TODO:not supported +--error ER_PARSE_ERROR SELECT * FROM t1 WHERE NOT EXISTS (((SELECT i FROM t1) UNION (SELECT i FROM t1))); @@ -2461,7 +2465,9 @@ WHERE NOT EXISTS (((SELECT i FROM t1) UNION (SELECT i FROM t1))); --error 1064 explain select ((select t11.i from t1 t11) union (select t12.i from t1 t12)) from t1; -#supported + +#TODO:not supported +--error ER_PARSE_ERROR explain select * from t1 where not exists ((select t11.i from t1 t11) union (select t12.i from t1 t12)); @@ -3002,4 +3008,27 @@ INSERT INTO t2 VALUES (103, 203); SELECT ((a1,a2) IN (SELECT * FROM t2 WHERE b2 > 0)) IS NULL FROM t1; DROP TABLE t1, t2; +# +# Bug #32036: EXISTS within a WHERE clause with a UNION crashes MySQL 5.122 +# + +CREATE TABLE t1 (a INT); +CREATE TABLE t2 (a INT); + +INSERT INTO t1 VALUES (1),(2); +INSERT INTO t2 VALUES (1),(2); + +SELECT 2 FROM t1 WHERE EXISTS ((SELECT 1 FROM t2 WHERE t1.a=t2.a)); +EXPLAIN EXTENDED +SELECT 2 FROM t1 WHERE EXISTS ((SELECT 1 FROM t2 WHERE t1.a=t2.a)); + + +#TODO:not supported +--error ER_PARSE_ERROR +EXPLAIN EXTENDED +SELECT 2 FROM t1 WHERE EXISTS ((SELECT 1 FROM t2 WHERE t1.a=t2.a) UNION + (SELECT 1 FROM t2 WHERE t1.a = t2.a)); + +DROP TABLE t1,t2; + --echo End of 5.0 tests. diff --git a/sql/sql_yacc.yy b/sql/sql_yacc.yy index 3401bf739b3..2e2a9b180d0 100644 --- a/sql/sql_yacc.yy +++ b/sql/sql_yacc.yy @@ -1137,7 +1137,7 @@ bool my_yyoverflow(short **a, YYSTYPE **b, ulong *yystacksize); %type internal_variable_name -%type subselect subselect_init +%type subselect take_first_select get_select_lex %type comp_op @@ -9422,35 +9422,22 @@ union_option: | ALL { $$=0; } ; -subselect: - SELECT_SYM subselect_start subselect_init subselect_end +take_first_select: /* empty */ { - $$= $3; - } - | '(' subselect_start subselect ')' - { - THD *thd= YYTHD; - /* - note that a local variable can't be used for - $3 as it's used in local variable construction - and some compilers can't guarnatee the order - in which the local variables are initialized. - */ - List_iterator it($3->item_list); - Item *item; - /* - we must fill the items list for the "derived table". - */ - while ((item= it++)) - add_item_to_list(thd, item); - } - union_clause subselect_end { $$= $3; }; + $$= Lex->current_select->master_unit()->first_select(); + }; -subselect_init: - select_init2 - { - $$= Lex->current_select->master_unit()->first_select(); - }; +subselect: + SELECT_SYM subselect_start select_init2 take_first_select + subselect_end + { + $$= $4; + } + | '(' subselect_start select_paren take_first_select + subselect_end ')' + { + $$= $4; + }; subselect_start: {