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-rw-r--r--mysql-test/t/subselect_sj.test11
1 files changed, 11 insertions, 0 deletions
diff --git a/mysql-test/t/subselect_sj.test b/mysql-test/t/subselect_sj.test
index 2c60e5645c3..c989cb22558 100644
--- a/mysql-test/t/subselect_sj.test
+++ b/mysql-test/t/subselect_sj.test
@@ -2693,5 +2693,16 @@ SET join_cache_level=@tmp_mdev5059;
set optimizer_switch=@tmp_os_mdev5059;
DROP TABLE t1,t2,t3,t4;
+--echo #
+--echo # MDEV-7911: crash in Item_cond::eval_not_null_tables
+--echo #
+
+create table t1(a int);
+insert into t1 values(1),(2),(3),(null);
+--error ER_CANT_AGGREGATE_2COLLATIONS
+explain
+select 1 from t1 where _cp932 "1" in (select '1' from t1);
+drop table t1;
+
# The following command must be the last one the file
set optimizer_switch=@subselect_sj_tmp;