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Rejected Alternatives

Reject Plan A

Add default method enableFilterPushDown in SupportsFilterPushDown interface.

In FilterPushDownSpec, determine whether filter pushdown is allowed. If it is not allowed, the applyFilters logic will not be executed.

@PublicEvolving
public interface SupportsFilterPushDown {

    /**
     * Provides a list of filters in conjunctive form. A source can pick filters and return the
     * accepted and remaining filters.
     *
     * <p>See the documentation of {@link SupportsFilterPushDown} for more information.
     */
    Result applyFilters(List<ResolvedExpression> filters);


    /**
     * Returns whether filter push down is enabled.
     */
    default boolean enableFilterPushDown() {
        return true;
    }
}

Reject Reason

The current interface can already satisfy the requirements. The connector can reject all the filters by returning the input filters as `Result#remainingFilters`.

Reject Plan B

Add a common configuration source.filter-push-down.enabled to disable filter push down for connectors.

The user specifies option for sources through a new connector option:

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