1 files changed, 18 insertions, 0 deletions
diff --git a/mysql-test/r/select_debug.result b/mysql-test/r/select_debug.result
new file mode 100644
index 00000000000..1eb8a0754fa
--- /dev/null
+++ b/mysql-test/r/select_debug.result
@@ -0,0 +1,18 @@
+#
+# Bug #725050: print keyuse info when  hash join is used 
+#
+create table t1 (a int, b int);
+insert into t1 values (2,2), (1,1);
+create table t2 (a int);
+insert into t2 values (2), (3);
+set session join_cache_level=3;
+set @@debug = 'd:t:O,/tmp/trace.out';
+explain select t1.b from t1,t2 where t1.b=t2.a;
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
+1	SIMPLE	t1	ALL	NULL	NULL	NULL	NULL	2	Using where
+1	SIMPLE	t2	hash_ALL	NULL	#hash#$hj	5	test.t1.b	2	Using where; Using join buffer (flat, BNLH join)
+select t1.b from t1,t2 where t1.b=t2.a;
+b
+2
+set session join_cache_level=default;
+drop table t1,t2;