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-rw-r--r--mysql-test/r/func_gconcat.result3
1 files changed, 3 insertions, 0 deletions
diff --git a/mysql-test/r/func_gconcat.result b/mysql-test/r/func_gconcat.result
index 184bd07b066..7235fded66a 100644
--- a/mysql-test/r/func_gconcat.result
+++ b/mysql-test/r/func_gconcat.result
@@ -555,3 +555,6 @@ FROM t1 JOIN t2 ON t1.bID = t2.bID;
COUNT(*) GROUP_CONCAT(DISTINCT t2.somename SEPARATOR ' |')
2 test
DROP TABLE t1,t2;
+select * from (select group_concat('c') from DUAL) t;
+group_concat('c')
+NULL