sdf-jkl commented on code in PR #20008:
URL: https://github.com/apache/datafusion/pull/20008#discussion_r2733925382
##########
datafusion/expr/src/udf.rs:
##########
@@ -709,20 +709,49 @@ pub trait ScalarUDFImpl: Debug + DynEq + DynHash + Send +
Sync {
Ok(ExprSimplifyResult::Original(args))
}
- /// Returns the [preimage] for this function and the specified scalar
value, if any.
+ /// Returns a single contiguous preimage for this function and the
specified
+ /// scalar expression, if any.
///
Review Comment:
```suggestion
///
/// Currently only applies to `=, !=, >, >=, <, <=, is distinct from, is
not distinct from` predicates
```
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