public void onMatch(RelOptRuleCall call) { final Filter topFilter = call.rel(0); final Filter bottomFilter = call.rel(1); // use RexPrograms to merge the two FilterRels into a single program // so we can convert the two LogicalFilter conditions to directly // reference the bottom LogicalFilter's child RexBuilder rexBuilder = topFilter.getCluster().getRexBuilder(); RexProgram bottomProgram = createProgram(bottomFilter); RexProgram topProgram = createProgram(topFilter); RexProgram mergedProgram = RexProgramBuilder.mergePrograms( topProgram, bottomProgram, rexBuilder); RexNode newCondition = mergedProgram.expandLocalRef( mergedProgram.getCondition()); final RelBuilder relBuilder = call.builder(); relBuilder.push(bottomFilter.getInput()) .filter(newCondition); call.transformTo(relBuilder.build()); }
public void onMatch(RelOptRuleCall call) { final Filter topFilter = call.rel(0); final Filter bottomFilter = call.rel(1); // use RexPrograms to merge the two FilterRels into a single program // so we can convert the two LogicalFilter conditions to directly // reference the bottom LogicalFilter's child RexBuilder rexBuilder = topFilter.getCluster().getRexBuilder(); RexProgram bottomProgram = createProgram(bottomFilter); RexProgram topProgram = createProgram(topFilter); RexProgram mergedProgram = RexProgramBuilder.mergePrograms( topProgram, bottomProgram, rexBuilder); RexNode newCondition = mergedProgram.expandLocalRef( mergedProgram.getCondition()); final RelBuilder relBuilder = call.builder(); relBuilder.push(bottomFilter.getInput()) .filter(newCondition); call.transformTo(relBuilder.build()); }