@InterfaceStability.Evolving public interface SupportsPushDownFilters extends DataSourceReader
DataSourceReader. Data source readers can implement this interface to push down filters to the data source and reduce the size of the data to be read.
|Modifier and Type||Method and Description|
Returns the filters that are pushed to the data source via
Pushes down filters, and returns filters that need to be evaluated after scanning.
pushFilters(Filter). There are 3 kinds of filters: 1. pushable filters which don't need to be evaluated again after scanning. 2. pushable filters which still need to be evaluated after scanning, e.g. parquet row group filter. 3. non-pushable filters. Both case 1 and 2 should be considered as pushed filters and should be returned by this method. It's possible that there is no filters in the query and
pushFilters(Filter)is never called, empty array should be returned for this case.