alamb commented on code in PR #13736:
URL: https://github.com/apache/datafusion/pull/13736#discussion_r1885723842
##########
datafusion/physical-expr-common/src/physical_expr.rs:
##########
@@ -149,6 +151,11 @@ pub trait PhysicalExpr: Send + Sync + Display + Debug +
DynEq + DynHash {
fn get_properties(&self, _children: &[ExprProperties]) ->
Result<ExprProperties> {
Ok(ExprProperties::new_unknown())
}
+
+ /// Return the column statistics of this expression given the statistics
of the input
Review Comment:
I wrote up a unified proposal here:
- https://github.com/apache/datafusion/issues/8078#issuecomment-2543895426
Feedback very welcome
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