berkaysynnada commented on code in PR #6469:
URL: https://github.com/apache/arrow-datafusion/pull/6469#discussion_r1210622599
##########
datafusion/core/src/datasource/listing/table.rs:
##########
@@ -418,7 +421,7 @@ impl ListingOptions {
///
/// assert_eq!(listing_options.file_sort_order, file_sort_order);
/// ```
- pub fn with_file_sort_order(mut self, file_sort_order: Option<Vec<Expr>>)
-> Self {
+ pub fn with_file_sort_order(mut self, file_sort_order: Vec<Vec<Expr>>) ->
Self {
Review Comment:
We have also considered such a design, and you can check our observations
[here](https://github.com/synnada-ai/arrow-datafusion/pull/107#pullrequestreview-1443036721).
In summary, that API cannot provide a reset for sort orders, and the user
needs to call it multiple times for multiple orderings (that is not the case
for other methods).
We have replaced `Vec<Vec<OrderByExpr>>` and `Vec<Vec<PhysicalSortExpr>>`
with `Vec<LexOrdering>` where the inner vector is used for a lexicographical
sorting and the outer is used for another lex sorting.
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