KurtYoung commented on a change in pull request #8440: [FLINK-12509] [table-planner-blink] Introduce planner rules about non semi/anti join URL: https://github.com/apache/flink/pull/8440#discussion_r285887550
########## File path: flink-table/flink-table-planner-blink/src/main/scala/org/apache/flink/table/plan/rules/logical/JoinConditionEqualityTransferRule.scala ########## @@ -0,0 +1,172 @@ +/* + * 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.flink.table.plan.rules.logical + +import org.apache.flink.table.plan.util.FlinkRexUtil + +import org.apache.calcite.plan.RelOptRule.{any, operand} +import org.apache.calcite.plan.{RelOptRule, RelOptRuleCall, RelOptUtil} +import org.apache.calcite.rel.core.{Join, JoinRelType} +import org.apache.calcite.rex.{RexBuilder, RexCall, RexInputRef, RexNode} +import org.apache.calcite.sql.SqlKind +import org.apache.calcite.sql.fun.SqlStdOperatorTable.EQUALS + +import scala.collection.JavaConversions._ +import scala.collection.mutable + +/** + * Planner rule that converts Join's conditions to the left or right table's own + * independent filter as much as possible, so that the rules of filter-push-down can push down + * the filter to below. + * + * <p>e.g. join condition: l_a = r_b and l_a = r_c. + * The l_a is a field from left input, both l_b and l_c are fields from the right input. Review comment: l_b -> r_b l_c -> r_c ---------------------------------------------------------------- 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. For queries about this service, please contact Infrastructure at: us...@infra.apache.org With regards, Apache Git Services
