Update 03228_variant_permutation_issue.sql

tests/queries/0_stateless/03228_variant_permutation_issue.sql

@@ -1 +1,8 @@
+SET allow_experimental_variant_type = 1;
 
+drop table if exists test;
+create table test (id UInt32, data Variant(String), version UInt64) engine=ReplacingMergeTree(version) order by id;
+insert into test values (1, NULL, 1), (2, 'bar', 1), (3, 'bar', 1);
+insert into test select id, 'baz' as _data, version+1 as _version from test where id=2;
+select * from test final WHERE data is not null format Null;
+drop table test;