Merge branch '10.2' into 10.3

1 files changed, 36 insertions, 0 deletions

diff --git a/mysql-test/main/selectivity.test b/mysql-test/main/selectivity.test
index cf12bdaea21..3df49456332 100644
--- a/mysql-test/main/selectivity.test
+++ b/mysql-test/main/selectivity.test
@@ -1066,3 +1066,39 @@ drop table t1,t0;
 set histogram_size=@save_histogram_size;
 set optimizer_use_condition_selectivity=@save_optimizer_use_condition_selectivity;
 set use_stat_tables=@save_use_stat_tables;
+
+--echo #
+--echo # MDEV-15306: Wrong/Unexpected result with the value
+--echo # optimizer_use_condition_selectivity set to 4
+--echo #
+
+CREATE TABLE t1 (a INT);
+INSERT INTO t1 VALUES (1), (2), (3), (4), (5), (6), (7), (8), (9), (10);
+
+delimiter |;
+CREATE FUNCTION f1() RETURNS INT DETERMINISTIC
+BEGIN
+  SET @cnt := @cnt + 1;
+  RETURN 1;
+END;|
+delimiter ;|
+set @save_optimizer_use_condition_selectivity=@@optimizer_use_condition_selectivity;
+set @save_use_stat_tables= @@use_stat_tables;
+set @@use_stat_tables='complementary';
+set @@optimizer_use_condition_selectivity=4;
+SET @cnt= 0;
+SELECT * FROM t1 WHERE a = f1();
+SELECT @cnt;
+
+set @@use_stat_tables='preferably';
+analyze table t1 persistent for all;
+SET @cnt := 0;
+set @@optimizer_use_condition_selectivity=4;
+SELECT * FROM t1 WHERE a = f1();
+SELECT @cnt;
+alter table  t1 force;
+set @@use_stat_tables= @save_use_stat_tables;
+set @@optimizer_use_condition_selectivity=@save_optimizer_use_condition_selectivity;
+drop table t1;
+drop function f1;
+