Apply suggestions from code review

Co-authored-by: Andrew Lamb <[email protected]>
apache · Sep 28, 2023 · cb2a776 · cb2a776
1 parent 5835f1a
commit cb2a776
Showing 1 changed file with 2 additions and 2 deletions.
diff --git a/docs/source/library-user-guide/custom-table-providers.md b/docs/source/library-user-guide/custom-table-providers.md
@@ -132,8 +132,8 @@ The `supports_filters_pushdown` method can be overridden to indicate which filte
 This returns a `Vec` of `TableProviderFilterPushDown` enums where each enum represents a filter that can be pushed down. The `TableProviderFilterPushDown` enum has three variants:
 
 - `TableProviderFilterPushDown::Unsupported` - the filter cannot be pushed down
-- `TableProviderFilterPushDown::Exact` - the filter can be pushed down and the data source can guarantee that the filter will be applied exactly as specified
-- `TableProviderFilterPushDown::Inexact` - the filter can be pushed down, but the data source cannot guarantee that the filter will be applied exactly as specified
+- `TableProviderFilterPushDown::Exact` - the filter can be pushed down and the data source can guarantee that the filter will be applied completely to all rows. This is the highest performance option. 
+- `TableProviderFilterPushDown::Inexact` - the filter can be pushed down, but the data source cannot guarantee that the filter will be applied to all rows. DataFusion will apply `Inexact` filters again after the scan to ensure correctness. 
 
 For filters that can be pushed down, they'll be passed to the `scan` method as the `filters` parameter and they can be made use of there.