From f0488fc21e2241cc60a6848d14ab120dec0e71e2 Mon Sep 17 00:00:00 2001
From: Richard Chien <stdrc@outlook.com>
Date: Mon, 18 Nov 2024 01:29:58 +0800
Subject: [PATCH] add e2e for `drop function`

Signed-off-by: Richard Chien <stdrc@outlook.com>
---
 e2e_test/udf/drop_function.slt | 55 ++++++++++++++++++++++++++++++++++
 1 file changed, 55 insertions(+)
 create mode 100644 e2e_test/udf/drop_function.slt

diff --git a/e2e_test/udf/drop_function.slt b/e2e_test/udf/drop_function.slt
new file mode 100644
index 0000000000000..8d7dcf82a6a90
--- /dev/null
+++ b/e2e_test/udf/drop_function.slt
@@ -0,0 +1,55 @@
+# https://github.com/risingwavelabs/risingwave/issues/17263
+
+statement ok
+create table t (a int, b int);
+
+statement ok
+create function add(a int, b int) returns int language python as $$
+def add(a, b):
+  return a+b
+$$;
+
+statement ok
+create materialized view mv as select add(a, b) as c from t;
+
+statement error
+drop function add;
+----
+db error: ERROR: Failed to run the query
+
+Caused by:
+  Permission denied: PermissionDenied: function used by 1 other objects.
+
+
+statement ok
+drop materialized view mv;
+
+statement ok
+drop function add;
+
+
+statement ok
+create function add(a int, b int) returns int language python as $$
+def add(a, b):
+  return a+b
+$$;
+
+statement ok
+create sink s as select add(a, b) as c from t with (connector = 'blackhole');
+
+statement error
+drop function add;
+----
+db error: ERROR: Failed to run the query
+
+Caused by:
+  Permission denied: PermissionDenied: function used by 1 other objects.
+
+statement ok
+drop sink s;
+
+statement ok
+drop function add;
+
+statement ok
+drop table t;