ozankabak commented on code in PR #16217:
URL: https://github.com/apache/datafusion/pull/16217#discussion_r2126760915
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datafusion/physical-expr-common/src/sort_expr.rs:
##########
@@ -129,23 +138,55 @@ impl PhysicalSortExpr {
to_str(&self.options)
)
}
-}
-/// Access the PhysicalSortExpr as a PhysicalExpr
-impl AsRef<dyn PhysicalExpr> for PhysicalSortExpr {
- fn as_ref(&self) -> &(dyn PhysicalExpr + 'static) {
- self.expr.as_ref()
+ /// Evaluates the sort expression into a `SortColumn` that can be passed
+ /// into the arrow sort kernel.
+ pub fn evaluate_to_sort_column(&self, batch: &RecordBatch) ->
Result<SortColumn> {
+ let array_to_sort = match self.expr.evaluate(batch)? {
+ ColumnarValue::Array(array) => array,
+ ColumnarValue::Scalar(scalar) =>
scalar.to_array_of_size(batch.num_rows())?,
+ };
+ Ok(SortColumn {
+ values: array_to_sort,
+ options: Some(self.options),
+ })
+ }
+
+ /// Checks whether this sort expression satisfies the given `requirement`.
Review Comment:
Agreed, I will add such clarifications.
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