Leon-WTF commented on code in PR #2599: URL: https://github.com/apache/drill/pull/2599#discussion_r1097007805
########## exec/java-exec/src/main/java/org/apache/drill/exec/planner/logical/DrillAddAggForExceptRule.java: ########## @@ -0,0 +1,76 @@ +/* + * Licensed to the Apache Software Foundation (ASF) under one + * or more contributor license agreements. See the NOTICE file + * distributed with this work for additional information + * regarding copyright ownership. The ASF licenses this file + * to you under the Apache License, Version 2.0 (the + * "License"); you may not use this file except in compliance + * with the License. You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ +package org.apache.drill.exec.planner.logical; + +import org.apache.calcite.plan.RelOptRule; +import org.apache.calcite.plan.RelOptRuleCall; +import org.apache.calcite.plan.RelOptRuleOperand; +import org.apache.calcite.plan.hep.HepRelVertex; +import org.apache.calcite.rel.RelNode; +import org.apache.calcite.util.ImmutableBitSet; +import org.apache.calcite.util.trace.CalciteTrace; +import org.apache.curator.shaded.com.google.common.collect.ImmutableList; +import org.apache.drill.exec.planner.physical.PrelUtil; +import org.slf4j.Logger; + +import static org.apache.drill.exec.ExecConstants.EXCEPT_ADD_AGG_BELOW; + +/** + * Rule that try to add agg for Except set op. + */ +public class DrillAddAggForExceptRule extends RelOptRule { + public static final RelOptRule INSTANCE = new DrillAddAggForExceptRule(RelOptHelper.any(DrillExceptRel.class), "DrillAddAggForExceptRule"); + protected static final Logger tracer = CalciteTrace.getPlannerTracer(); + + public DrillAddAggForExceptRule(RelOptRuleOperand operand, String description) { + super(operand, description); + } + + @Override + public boolean matches(RelOptRuleCall call) { + DrillExceptRel drillExceptRel = call.rel(0); + return !drillExceptRel.all && !drillExceptRel.isAggAdded() && !findAggRel(drillExceptRel.getInput(0)); + } + + private boolean findAggRel(RelNode relNode) { + if (relNode instanceof HepRelVertex) { + return findAggRel(((HepRelVertex) relNode).getCurrentRel()); + } + if (relNode instanceof DrillAggregateRel) { + return true; + } + if (relNode.getInputs().size() == 1 && relNode.getInput(0) != null) { + return findAggRel(relNode.getInput(0)); + } + return false; + } + + @Override + public void onMatch(RelOptRuleCall call) { + final DrillExceptRel drillExceptRel = call.rel(0); + boolean addAggBelow = PrelUtil.getPlannerSettings(call.getPlanner()).getOptions().getOption(EXCEPT_ADD_AGG_BELOW); + if (addAggBelow) { + RelNode aggNode = new DrillAggregateRel(drillExceptRel.getCluster(), drillExceptRel.getTraitSet(), drillExceptRel.getInput(0), + ImmutableBitSet.range(0, drillExceptRel.getInput(0).getRowType().getFieldList().size()), ImmutableList.of(), ImmutableList.of()); + call.transformTo(drillExceptRel.copy(ImmutableList.of(aggNode, drillExceptRel.getInput(1)), true)); + } else { + call.transformTo(new DrillAggregateRel(drillExceptRel.getCluster(), drillExceptRel.getTraitSet(), drillExceptRel.copy(true), Review Comment: It's not distinct for left table after except operator. I choosed to reuse an aggregate operator to do the distinct. -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: dev-unsubscr...@drill.apache.org For queries about this service, please contact Infrastructure at: us...@infra.apache.org
