add test

Signed-off-by: Runji Wang <[email protected]>

e2e_test/udf/udf.slt

@@ -224,6 +224,43 @@ select (extract_tcp_info(E'\\x45000034a8a8400040065b8ac0a8000ec0a80001035d20b6d9
 ----
 192.168.0.14 192.168.0.1 861 8374
 
+# steaming
+# to ensure UDF & UDTF respect visibility
+
+statement ok
+create table t (x int);
+
+statement ok
+create materialized view mv1 as select gcd(x, x) from t where x = 1;
+
+statement ok
+create materialized view mv2 as select series(x) from t where x = 1;
+
+statement ok
+insert into t values (1), (2);
+
+statement ok
+flush;
+
+query T
+select * from mv1;
+----
+1
+
+query T
+select * from mv2;
+----
+0
+
+statement ok
+drop materialized view mv1;
+
+statement ok
+drop materialized view mv2;
+
+statement ok
+drop table t;
+
 # error handling
 
 statement error