revision-id: f3dd96ad25efe23081981f52a54a57b17a5a890e (mariadb-10.2.31-961-gf3dd96ad25e) parent(s): 4625830b6794184a57c2702436e810be941a51c0 author: Sergei Petrunia committer: Sergei Petrunia timestamp: 2021-05-20 18:26:24 +0300 message: MDEV-23937: SIGSEGV in looped best_extension_by_limited_search from greedy_search Add a testcase (fixed by fix for MDEV-17783) --- mysql-test/r/selectivity_no_engine.result | 20 ++++++++++++++++++++ mysql-test/t/selectivity_no_engine.test | 21 +++++++++++++++++++++ 2 files changed, 41 insertions(+) diff --git a/mysql-test/r/selectivity_no_engine.result b/mysql-test/r/selectivity_no_engine.result index 7fc3c6e9909..74a52c9fed8 100644 --- a/mysql-test/r/selectivity_no_engine.result +++ b/mysql-test/r/selectivity_no_engine.result @@ -293,6 +293,26 @@ SELECT * FROM t1 WHERE t1.d = 0 AND t1.p = '1' AND t1.i != '-1' AND t1.n = 'some i n d p set optimizer_use_condition_selectivity= @tmp_mdev8779; DROP TABLE t1; +# +# MDEV-23937: SIGSEGV in looped best_extension_by_limited_search from greedy_search +# (Testcase only) +# +set +@tmp_jcl= @@join_cache_level, +@tmp_ucs= @@optimizer_use_condition_selectivity; +set +join_cache_level=3, +optimizer_use_condition_selectivity=2; +CREATE TABLE t1 AS SELECT * FROM mysql.user; +CREATE TABLE t3 (b VARCHAR (1)); +CREATE TABLE t2 (c2 INT); +INSERT INTO t2 VALUES (1); +EXPLAIN +SELECT * FROM t1 AS a NATURAL JOIN t1 AS b; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE a ALL NULL NULL NULL NULL 4 +1 SIMPLE b hash_ALL NULL #hash#$hj 827 test.a.Host,test.a.User,test.a.Password,test.a.Select_priv,test.a.Insert_priv,test.a.Update_priv,test.a.Delete_priv,test.a.Create_priv,test.a.Drop_priv,test.a.Reload_priv,test.a.Shutdown_priv,test.a.Process_priv,test.a.File_priv,test.a.Grant_priv,test.a.References_priv,test.a.Index_priv,test.a.Alter_priv,test.a.Show_db_priv,test.a.Super_priv,test.a.Create_tmp_table_priv,test.a.Lock_tables_priv,test.a.Execute_priv,test.a.Repl_slave_priv,test.a.Repl_client_priv,test.a.Create_view_priv,test.a.Show_view_priv,test.a.Create_routine_priv,test.a.Alter_routine_priv,test.a.Create_user_priv,test.a.Event_priv,test.a.Trigger_priv,test.a.Create_tablespace_priv,test.a.ssl_type,test.a.ssl_cipher,test.a.x509_issuer,test.a.x509_subject,test.a.max_questions,test.a.max_updates,test.a.max_connections,test.a.max_user_connections,test.a.plugin,test.a.authentication_string,test.a.password_expired,test.a.is_role,test.a.default_role,test.a.max_statement_time 4 Using whe re; Using join buffer (flat, BNLH join) +DROP TABLE t1,t2,t3; # # End of the test file # diff --git a/mysql-test/t/selectivity_no_engine.test b/mysql-test/t/selectivity_no_engine.test index 345b7bd1e8a..b5f52dd167d 100644 --- a/mysql-test/t/selectivity_no_engine.test +++ b/mysql-test/t/selectivity_no_engine.test @@ -228,6 +228,27 @@ SELECT * FROM t1 WHERE t1.d = 0 AND t1.p = '1' AND t1.i != '-1' AND t1.n = 'some set optimizer_use_condition_selectivity= @tmp_mdev8779; DROP TABLE t1; +--echo # +--echo # MDEV-23937: SIGSEGV in looped best_extension_by_limited_search from greedy_search +--echo # (Testcase only) +--echo # +set + @tmp_jcl= @@join_cache_level, + @tmp_ucs= @@optimizer_use_condition_selectivity; +set + join_cache_level=3, + optimizer_use_condition_selectivity=2; + +CREATE TABLE t1 AS SELECT * FROM mysql.user; +CREATE TABLE t3 (b VARCHAR (1)); +CREATE TABLE t2 (c2 INT); +INSERT INTO t2 VALUES (1); + +EXPLAIN +SELECT * FROM t1 AS a NATURAL JOIN t1 AS b; + +DROP TABLE t1,t2,t3; + --echo # --echo # End of the test file --echo #