auroflow commented on code in PR #29652: URL: https://github.com/apache/flink/pull/29652#discussion_r4450196689
########## flink-table/flink-table-planner/src/main/java/org/apache/flink/table/planner/plan/rules/logical/RemoteCalcReorderProjectionRule.java: ########## @@ -0,0 +1,74 @@ +/* + * 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.planner.plan.rules.logical; + +import org.apache.flink.table.planner.plan.nodes.logical.FlinkLogicalCalc; + +import org.apache.calcite.plan.RelOptRuleCall; +import org.apache.calcite.rex.RexCall; +import org.apache.calcite.rex.RexInputRef; +import org.apache.calcite.rex.RexNode; +import org.apache.calcite.rex.RexProgram; + +import java.util.List; +import java.util.stream.Collectors; + +import scala.Option; + +/** + * Enforces that {@link RexInputRef} projections precede {@link RexCall} projections in a {@link + * FlinkLogicalCalc} containing remote calls. + * + * <p>{@link RemoteCalcRewriteProjectionRule} moves expressions other than {@link RexInputRef} and + * {@link RexCall} out of the remote calc and also establishes this projection order. Subsequent + * optimizations, such as async calc splitting, can disrupt that order. This rule restores the + * required order after those optimizations. + */ +public class RemoteCalcReorderProjectionRule extends RemoteCalcSplitProjectionRuleBase<Void> { Review Comment: Added Javadoc explaining why a distinct rule is needed, and changed it to extend `RemoteCalcRewriteProjectionRule` to reuse the rewrite logic. -- 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: [email protected] For queries about this service, please contact Infrastructure at: [email protected]
