From afb5deb9db44b52bd86512a8829a28ed52adcd0d Mon Sep 17 00:00:00 2001 From: Oleg Smirnov Date: Thu, 12 Jan 2023 13:18:33 +0700 Subject: MDEV-29294 Assertion `functype() == ((Item_cond *) new_item)->functype()' failed in Item_cond::remove_eq_conds on SELECT Item_singlerow_subselect may be converted to Item_cond during optimization. So there is a possibility of constructing nested Item_cond_and or Item_cond_or which is not allowed (such conditions must be flattened). This commit checks if such kind of optimization has been applied and flattens the condition if needed --- mysql-test/main/select.result | 56 +++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 56 insertions(+) (limited to 'mysql-test/main/select.result') diff --git a/mysql-test/main/select.result b/mysql-test/main/select.result index 1562144b164..fc3a29094ae 100644 --- a/mysql-test/main/select.result +++ b/mysql-test/main/select.result @@ -5639,4 +5639,60 @@ EXECUTE stmt; COUNT(DISTINCT a) 3 DROP TABLE t1; +# +# MDEV-29294: Assertion `functype() == ((Item_cond *) new_item)->functype()' +# failed in Item_cond::remove_eq_conds on SELECT +# +CREATE TABLE t1 (a INT); +INSERT INTO t1 VALUES (1),(2),(3); +# Test for nested OR conditions: +SELECT * FROM t1 WHERE a = 1 AND +(3 = 0 OR (SELECT a = 1 OR (SELECT 3 WHERE a = a) = 3)); +a +1 +EXPLAIN EXTENDED +SELECT * FROM t1 WHERE a = 1 AND +(3 = 0 OR (SELECT a = 1 OR (SELECT 3 WHERE a = a) = 3)); +id select_type table type possible_keys key key_len ref rows filtered Extra +1 PRIMARY t1 ALL NULL NULL NULL NULL 3 100.00 Using where; Using temporary +3 DEPENDENT SUBQUERY NULL NULL NULL NULL NULL NULL NULL NULL No tables used +Warnings: +Note 1276 Field or reference 'test.t1.a' of SELECT #2 was resolved in SELECT #1 +Note 1276 Field or reference 'test.t1.a' of SELECT #3 was resolved in SELECT #1 +Note 1276 Field or reference 'test.t1.a' of SELECT #3 was resolved in SELECT #1 +Note 1249 Select 2 was reduced during optimization +Note 1003 /* select#1 */ select `test`.`t1`.`a` AS `a` from `test`.`t1` where `test`.`t1`.`a` = 1 and (1 or <`test`.`t1`.`a`>((/* select#3 */ select 3 from DUAL where `test`.`t1`.`a` = `test`.`t1`.`a`)) = 3) +PREPARE stmt FROM 'SELECT * FROM t1 WHERE a = 1 AND + (3 = 0 OR (SELECT a = 1 OR (SELECT 3 WHERE a = a) = 3))'; +EXECUTE stmt; +a +1 +EXECUTE stmt; +a +1 +CREATE VIEW v1 AS SELECT * FROM t1 WHERE a = 1 AND +(3 = 0 OR (SELECT a = 1 OR (SELECT 3 WHERE a = a) = 3)); +SELECT * FROM v1; +a +1 +# Test for nested AND conditions: +SELECT * FROM t1 WHERE a = 1 OR +(3 = 3 AND (SELECT a = 1 AND (SELECT 3 WHERE a = a) = 3)); +a +1 +PREPARE stmt FROM 'SELECT * FROM t1 WHERE a = 1 OR + (3 = 3 AND (SELECT a = 1 AND (SELECT 3 WHERE a = a) = 3))'; +EXECUTE stmt; +a +1 +EXECUTE stmt; +a +1 +CREATE VIEW v2 AS SELECT * FROM t1 WHERE a = 1 OR +(3 = 3 AND (SELECT a = 1 AND (SELECT 3 WHERE a = a) = 3)); +SELECT * FROM v2; +a +1 +DROP TABLE t1; +DROP VIEW v1, v2; End of 10.0 tests -- cgit v1.2.1