Garamda commented on code in PR #13511:
URL: https://github.com/apache/datafusion/pull/13511#discussion_r1938219937
##########
datafusion/sql/src/expr/function.rs:
##########
@@ -336,7 +369,28 @@ impl<S: ContextProvider> SqlToRel<'_, S> {
None,
)?;
let order_by = (!order_by.is_empty()).then_some(order_by);
- let args = self.function_args_to_expr(args, schema,
planner_context)?;
+ let mut args =
+ self.function_args_to_expr(args, schema, planner_context)?;
+
+ let within_group = self.order_by_to_sort_expr(
+ within_group,
+ schema,
+ planner_context,
+ false,
+ None,
+ )?;
+
+ // add target column expression in within group clause to
function arguments
Review Comment:
The `Signature` of `ApproxPercentileCont` and
`ApproxPercentileContWithWeight` are not changed. Instead, the expression in
`WITHIN GROUP` clause is added into function arguments while converting `sql
expr` to `logical expr`.
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