1 files changed, 20 insertions, 0 deletions
diff --git a/mysql-test/main/key_primary.result b/mysql-test/main/key_primary.result
new file mode 100644
index 00000000..7726a8e1
--- /dev/null
+++ b/mysql-test/main/key_primary.result
@@ -0,0 +1,20 @@
+drop table if exists t1;
+create table t1 (t1 char(3) primary key);
+insert into t1 values("ABC");
+insert into t1 values("ABA");
+insert into t1 values("AB%");
+select * from t1 where t1="ABC";
+t1
+ABC
+select * from t1 where t1="ABCD";
+t1
+select * from t1 where t1 like "a_\%";
+t1
+AB%
+describe select * from t1 where t1="ABC";
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
+1	SIMPLE	t1	const	PRIMARY	PRIMARY	3	const	1	Using index
+describe select * from t1 where t1="ABCD";
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
+1	SIMPLE	NULL	NULL	NULL	NULL	NULL	NULL	NULL	Impossible WHERE noticed after reading const tables
+drop table t1;