gstamatakis95 commented on code in PR #25279:
URL: https://github.com/apache/datafusion/pull/25279#discussion_r4076250695
##########
datafusion/catalog-listing/src/table.rs:
##########
@@ -683,8 +683,26 @@ impl ListingTable {
None => {} // no ordering required
}
+ // Hive grouped files are contiguous key intervals, so they declare
`Range`
+ // unless the statistics re-cut above changed the groups. The ordering
must
+ // match the `SortOptions::default()` used to cut the groups.
+ let derived_output_partitioning =
+ if partitioned_by_file_group && !regrouped_by_statistics {
+ let ordering = table_partition_cols
+ .iter()
+ .map(|field| {
+
Expr::Column(Column::from_name(field.name())).sort(true, true)
Review Comment:
The ordering now comes from `PhysicalSortExpr::new_default`, which is
`SortOptions::default()`, the same default used to cut the groups.
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