Create a FilterPushThroughFilterRule

[Γιώργος Θεοδωράκης]

Hello,

I want to create a rule that pushes a filter through another filter ( I
don't merge them) according to their selectivities to optimize the final
plan. I am using other rules as templates to create it but I keep getting
errors, as I haven't understood correctly the basics. I want to have
something like this :

  public void onMatch(RelOptRuleCall call) {
    final Filter filter = call.rel(0);
    final Filter secFilter = call.rel(1);
    final RelBuilder relBuilder = call.builder();
    relBuilder.push(filter)
    .filter(secFilter.getCondition())
    .build();
    call.transformTo(relBuilder.build());
 }