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MDEV-28206: SIGSEGV in Item_field::fix_fields when using LEAD...OVER

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thd->lex->in_sum_func->max_arg_level cannot be set to a
bigger value of select->nest_level if select is null.
This commit is contained in:
Daniel Black
2022-11-29 15:19:37 +11:00
parent 4783f37cf7
commit 072b3668ca
4 changed files with 77 additions and 0 deletions
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28
mysql-test/main/win.test
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@ -2829,3 +2829,31 @@ create table t1 (a int);
insert into t1 values (1),(2),(3);
SELECT row_number() OVER (order by a) FROM t1 order by NAME_CONST('myname',NULL);
drop table t1;
--echo #
--echo # MDEV-28206 SIGSEGV in Item_field::fix_fields when using LEAD...OVER
--echo #
CREATE TABLE t(c1 INT);
DELIMITER //;
CREATE FUNCTION f() RETURNS INT READS SQL DATA BEGIN
DECLARE v INT;
SELECT 1 INTO v FROM (SELECT c1,COALESCE(LEAD(a2.c1) OVER (PARTITION BY a2.c1 ORDER BY a2.c1),a2.c1) AS a1 FROM (t a2 JOIN t a3 USING (c1))) a4;
RETURN 1;
END//
DELIMITER ;//
SELECT f(),f();
EXECUTE IMMEDIATE "SELECT LEAD(c1) OVER (ORDER BY c1) FROM t NATURAL JOIN t AS a;";
EXECUTE IMMEDIATE "SELECT SUM(c1) OVER (ORDER BY c1) FROM t NATURAL JOIN t AS a;";
EXECUTE IMMEDIATE "SELECT LEAD(c) OVER (ORDER BY c) FROM (SELECT 1 AS c) AS a NATURAL JOIN (SELECT 1 AS c) AS b;";
DROP FUNCTION f;
DROP TABLE t;
--echo #
--echo # End of 10.6 tests
--echo #