UDF evaluate bounds default impl

apache · Feb 25, 2025 · f521a6a · f521a6a
1 parent 8813adb
commit f521a6a
Showing 1 changed file with 7 additions and 2 deletions.
diff --git a/datafusion/expr/src/udf.rs b/datafusion/expr/src/udf.rs
@@ -722,8 +722,13 @@ pub trait ScalarUDFImpl: Debug + Send + Sync {
     ///
     /// If the function is `ABS(a)`, and the input interval is `a: [-3, 2]`,
     /// then the output interval would be `[0, 3]`.
-    fn evaluate_bounds(&self, _input: &[&Interval]) -> Result<Interval> {
-        not_impl_err!("Not implemented for UDF {:?}", self)
+    fn evaluate_bounds(&self, input: &[&Interval]) -> Result<Interval> {
+        let input_data_types = input
+            .iter()
+            .map(|i| i.data_type())
+            .collect::<Vec<DataType>>();
+        let return_type = self.return_type(&input_data_types)?;
+        Interval::make_unbounded(&return_type)
     }
 
     /// Indicates whether this ['ScalarUDFImpl'] supports interval arithmetic.