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-rw-r--r--mysql-test/t/csv.test14
1 files changed, 14 insertions, 0 deletions
diff --git a/mysql-test/t/csv.test b/mysql-test/t/csv.test
index 60d38394fc0..48c174355f4 100644
--- a/mysql-test/t/csv.test
+++ b/mysql-test/t/csv.test
@@ -1605,3 +1605,17 @@ check table bug22080_2;
check table bug22080_3;
drop tables bug22080_1,bug22080_2,bug22080_3;
+
+#
+# Bug #21328 mysqld issues warnings on ALTER CSV table to MyISAM
+#
+
+CREATE TABLE `bug21328` (
+ `col1` int(11) DEFAULT NULL,
+ `col2` int(11) DEFAULT NULL,
+ `col3` int(11) DEFAULT NULL
+) ENGINE=CSV;
+
+insert into bug21328 values (1,NULL,NULL);
+alter table bug21328 engine=myisam;
+drop table bug21328;