Fixed LP bug #725050.

The bug in the function print_keyuse() caused crashes if
hash join could be used. It happened because the function
ignored the fact that KEYUSE structures could be created
for hash joins as well. 

1 files changed, 18 insertions, 0 deletions

diff --git a/mysql-test/t/join_cache.test b/mysql-test/t/join_cache.test
index 4bde588cb7d..654c9f96a24 100644
--- a/mysql-test/t/join_cache.test
+++ b/mysql-test/t/join_cache.test
@@ -3100,3 +3100,21 @@ DROP TABLE t1,t2;
 
 # this must be the last command in the file
 set @@optimizer_switch=@save_optimizer_switch;
+
+--echo #
+--echo # Bug #725050: print keyuse info when  hash join is used 
+--echo #
+
+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;
+select t1.b from t1,t2 where t1.b=t2.a;
+
+set session join_cache_level=default;
+drop table t1,t2;