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-rw-r--r--mysql-test/t/func_gconcat.test9
1 files changed, 9 insertions, 0 deletions
diff --git a/mysql-test/t/func_gconcat.test b/mysql-test/t/func_gconcat.test
index c415ca6c6eb..df8199a5bc7 100644
--- a/mysql-test/t/func_gconcat.test
+++ b/mysql-test/t/func_gconcat.test
@@ -590,4 +590,13 @@ select group_concat(distinct a, c order by a desc, c desc) from t1;
drop table t1;
+#
+# Bug#30897 GROUP_CONCAT returns extra comma on empty fields
+#
+create table t1 (f1 char(20));
+insert into t1 values (''),('');
+select group_concat(distinct f1) from t1;
+select group_concat(f1) from t1;
+drop table t1;
+
--echo End of 5.0 tests