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-rw-r--r--mysql-test/r/group_by.result11
1 files changed, 11 insertions, 0 deletions
diff --git a/mysql-test/r/group_by.result b/mysql-test/r/group_by.result
index 3de20ac6df4..57f21a5e0eb 100644
--- a/mysql-test/r/group_by.result
+++ b/mysql-test/r/group_by.result
@@ -2482,3 +2482,14 @@ test
1
2
SET sql_mode='';
+#
+# MDEV-6484: Assertion `tab->ref.use_count' failed on query with joins, constant table, multi-part key
+#
+CREATE TABLE t1 (i1 INT, c1 VARCHAR(1)) ENGINE=MyISAM;
+INSERT INTO t1 VALUES (6,'b');
+CREATE TABLE t2 (pk2 INT, i2 INT, c2 VARCHAR(1), PRIMARY KEY(pk2), KEY(pk2,i2)) ENGINE=MyISAM;
+INSERT INTO t2 VALUES (1,2,'s'),(2,4,'r'),(3,8,'m'),(4,4,'b'),(5,4,'x'),(6,7,'g'),(7,4,'p');
+SELECT i2 FROM t1 AS t1a STRAIGHT_JOIN ( t2 INNER JOIN t1 AS t1b ON (t1b.c1 = c2) ) ON (t1b.i1 = pk2 )
+WHERE t1a.c1 = c2 GROUP BY i2;
+i2
+DROP TABLE t1,t2;