Update datafusion/expr/src/udaf.rs

Co-authored-by: Andrew Lamb <[email protected]>
apache · Aug 20, 2024 · e45d1bb · e45d1bb
1 parent a42654c
commit e45d1bb
Showing 1 changed file with 2 additions and 1 deletion.
diff --git a/datafusion/expr/src/udaf.rs b/datafusion/expr/src/udaf.rs
@@ -571,7 +571,8 @@ pub trait AggregateUDFImpl: Debug + Send + Sync {
         None
     }
 
-    /// Returns default value of the function given the input is Null
+    /// Returns default value of the function given the input is all `null`.
+    ///
     /// Most of the aggregate function return Null if input is Null,
     /// while `count` returns 0 if input is Null
     fn default_value(&self, data_type: &DataType) -> Result<ScalarValue> {