Garamda commented on code in PR #13511:
URL: https://github.com/apache/datafusion/pull/13511#discussion_r1980829367
##########
datafusion/sql/src/expr/function.rs:
##########
@@ -349,15 +365,49 @@ impl<S: ContextProvider> SqlToRel<'_, S> {
} else {
// User defined aggregate functions (UDAF) have precedence in case
it has the same name as a scalar built-in function
if let Some(fm) = self.context_provider.get_aggregate_meta(&name) {
- let order_by = self.order_by_to_sort_expr(
- order_by,
- schema,
- planner_context,
- true,
- None,
- )?;
- let order_by = (!order_by.is_empty()).then_some(order_by);
- let args = self.function_args_to_expr(args, schema,
planner_context)?;
+ if fm.is_ordered_set_aggregate() && within_group.is_empty() {
+ return plan_err!("WITHIN GROUP clause is required when
calling ordered set aggregate function({})", fm.name());
+ }
+
+ if null_treatment.is_some() &&
!fm.supports_null_handling_clause() {
+ return plan_err!(
+ "[IGNORE | RESPECT] NULLS are not permitted for {}",
+ fm.name()
+ );
+ }
Review Comment:
cf) I have applied all reviews that you tagged 'minor', since I was also
convinced.
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