diff --git a/src/operator/src/expr_factory.rs b/src/operator/src/expr_factory.rs
index 99f84d3708e0..b9c1fbd445e8 100644
--- a/src/operator/src/expr_factory.rs
+++ b/src/operator/src/expr_factory.rs
@@ -815,10 +815,10 @@ mod tests {
         };
 
         assert_eq!(2, set_database_options.len());
-        assert_eq!("key1", set_database_options.get(0).unwrap().key);
-        assert_eq!("value1", set_database_options.get(0).unwrap().value);
-        assert_eq!("key2", set_database_options.get(1).unwrap().key);
-        assert_eq!("value2", set_database_options.get(1).unwrap().value);
+        assert_eq!("key1", set_database_options[0].key);
+        assert_eq!("value1", set_database_options[0].value);
+        assert_eq!("key2", set_database_options[1].key);
+        assert_eq!("value2", set_database_options[1].value);
 
         let sql = "ALTER DATABASE greptime UNSET key1, key2;";
         let stmt =