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-rw-r--r--mysql-test/r/range.result24
1 files changed, 24 insertions, 0 deletions
diff --git a/mysql-test/r/range.result b/mysql-test/r/range.result
index 6a3850c0ed9..f1f949acd3b 100644
--- a/mysql-test/r/range.result
+++ b/mysql-test/r/range.result
@@ -3201,5 +3201,29 @@ pk i v a b
2 2 4 2 4
drop table t1, t2;
#
+# MDEV-26553: Always FALSE/NULL disjunct on top level of WHERE is removed
+#
+create table t1 (a int, b int, index idx(a,b));
+insert into t1 values (1,1), (1,2), (2,1), (2,2), (3,3);
+create table t2 (c int);
+insert into t2 values (5), (2), (3), (4);
+select 1 from t1 s1
+where 1 not in (select 1 from t1
+where ((a = 1 or a = 2) and b = 1) or (b > 5 and b < 1));
+1
+select 1 from t1 s1
+where 1 not in (select 1 from t1
+where ((a = 1 or a = 2) and b = 1) or b = NULL);
+1
+select c from t2
+where 2 not in (select 1 from t1
+where ((a=1 or a=2) and b = 1) or (b > 5 and b < 1));
+c
+5
+2
+3
+4
+drop table t1,t2;
+#
# End of 10.2 tests
#