diff options
Diffstat (limited to '')
| -rw-r--r-- | mysql-test/main/join_cache.result | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/mysql-test/main/join_cache.result b/mysql-test/main/join_cache.result index b8dddff9..323c4a73 100644 --- a/mysql-test/main/join_cache.result +++ b/mysql-test/main/join_cache.result @@ -6401,5 +6401,27 @@ b b d c c 10 NULL NULL NULL NULL DROP TABLE t1,t2,t3,t4; # +# MDEV-21102: Server crashes in JOIN_CACHE::write_record_data upon EXPLAIN with subqueries and constant tables +# +CREATE TABLE t1 (a int, b int) ENGINE=MyISAM; +CREATE TABLE t2 (c int, d int) ENGINE=MyISAM; +INSERT INTO t2 VALUES (1,10); +CREATE TABLE t3 (e int, key (e)) ENGINE=MyISAM; +INSERT INTO t3 VALUES (2),(3); +# Must not crash, must use join buffer in subquery +EXPLAIN +SELECT * FROM t1 +WHERE a > b OR a IN ( +SELECT c FROM t2 WHERE EXISTS ( +SELECT * FROM t3 t3a JOIN t3 t3b WHERE t3a.e < d +) +); +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY NULL NULL NULL NULL NULL NULL NULL Impossible WHERE noticed after reading const tables +2 DEPENDENT SUBQUERY t2 system NULL NULL NULL NULL 1 +3 SUBQUERY t3a range e e 5 NULL 2 Using where; Using index +3 SUBQUERY t3b index NULL e 5 NULL 2 Using index; Using join buffer (flat, BNL join) +DROP TABLE t1,t2,t3; +# # End of 10.4 tests # |