godfreyhe commented on a change in pull request #16520: URL: https://github.com/apache/flink/pull/16520#discussion_r676640858
########## File path: flink-table/flink-table-planner/src/main/java/org/apache/flink/table/planner/calcite/RelTimeIndicatorConverter.java ########## @@ -0,0 +1,812 @@ +/* + * 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.calcite; + +import org.apache.flink.api.java.tuple.Tuple2; +import org.apache.flink.table.api.TableException; +import org.apache.flink.table.api.ValidationException; +import org.apache.flink.table.planner.functions.sql.FlinkSqlOperatorTable; +import org.apache.flink.table.planner.plan.metadata.FlinkRelMetadataQuery; +import org.apache.flink.table.planner.plan.nodes.calcite.LogicalLegacySink; +import org.apache.flink.table.planner.plan.nodes.calcite.LogicalRank; +import org.apache.flink.table.planner.plan.nodes.calcite.LogicalSink; +import org.apache.flink.table.planner.plan.nodes.calcite.LogicalTableAggregate; +import org.apache.flink.table.planner.plan.nodes.calcite.LogicalWatermarkAssigner; +import org.apache.flink.table.planner.plan.nodes.calcite.LogicalWindowAggregate; +import org.apache.flink.table.planner.plan.nodes.calcite.LogicalWindowTableAggregate; +import org.apache.flink.table.planner.plan.nodes.hive.LogicalDistribution; +import org.apache.flink.table.planner.plan.schema.TimeIndicatorRelDataType; +import org.apache.flink.table.planner.plan.trait.RelWindowProperties; +import org.apache.flink.table.planner.plan.utils.TemporalJoinUtil; +import org.apache.flink.table.types.logical.LocalZonedTimestampType; +import org.apache.flink.table.types.logical.LogicalType; +import org.apache.flink.table.types.logical.TimestampKind; +import org.apache.flink.table.types.logical.TimestampType; +import org.apache.flink.util.Preconditions; + +import org.apache.calcite.plan.RelOptUtil; +import org.apache.calcite.rel.RelCollations; +import org.apache.calcite.rel.RelNode; +import org.apache.calcite.rel.RelShuttle; +import org.apache.calcite.rel.SingleRel; +import org.apache.calcite.rel.core.Aggregate; +import org.apache.calcite.rel.core.AggregateCall; +import org.apache.calcite.rel.core.Collect; +import org.apache.calcite.rel.core.SetOp; +import org.apache.calcite.rel.core.TableFunctionScan; +import org.apache.calcite.rel.core.TableScan; +import org.apache.calcite.rel.core.Uncollect; +import org.apache.calcite.rel.core.Values; +import org.apache.calcite.rel.logical.LogicalAggregate; +import org.apache.calcite.rel.logical.LogicalCalc; +import org.apache.calcite.rel.logical.LogicalCorrelate; +import org.apache.calcite.rel.logical.LogicalExchange; +import org.apache.calcite.rel.logical.LogicalFilter; +import org.apache.calcite.rel.logical.LogicalIntersect; +import org.apache.calcite.rel.logical.LogicalJoin; +import org.apache.calcite.rel.logical.LogicalMatch; +import org.apache.calcite.rel.logical.LogicalMinus; +import org.apache.calcite.rel.logical.LogicalProject; +import org.apache.calcite.rel.logical.LogicalSnapshot; +import org.apache.calcite.rel.logical.LogicalSort; +import org.apache.calcite.rel.logical.LogicalTableFunctionScan; +import org.apache.calcite.rel.logical.LogicalTableModify; +import org.apache.calcite.rel.logical.LogicalUnion; +import org.apache.calcite.rel.logical.LogicalValues; +import org.apache.calcite.rel.type.RelDataType; +import org.apache.calcite.rel.type.RelDataTypeField; +import org.apache.calcite.rex.RexBuilder; +import org.apache.calcite.rex.RexCall; +import org.apache.calcite.rex.RexInputRef; +import org.apache.calcite.rex.RexNode; +import org.apache.calcite.rex.RexShuttle; +import org.apache.calcite.sql.SqlOperator; +import org.apache.calcite.sql.fun.SqlStdOperatorTable; + +import java.util.ArrayList; +import java.util.Collections; +import java.util.HashSet; +import java.util.LinkedHashMap; +import java.util.List; +import java.util.Map; +import java.util.Set; +import java.util.function.Function; +import java.util.function.Predicate; +import java.util.stream.Collectors; +import java.util.stream.IntStream; + +import static org.apache.flink.table.planner.calcite.FlinkTypeFactory.isProctimeIndicatorType; +import static org.apache.flink.table.planner.calcite.FlinkTypeFactory.isRowtimeIndicatorType; +import static org.apache.flink.table.planner.calcite.FlinkTypeFactory.isTimeIndicatorType; +import static org.apache.flink.table.planner.calcite.FlinkTypeFactory.isTimestampLtzIndicatorType; +import static org.apache.flink.table.planner.plan.utils.MatchUtil.isFinalOnMatchTimeIndicator; +import static org.apache.flink.table.planner.plan.utils.MatchUtil.isMatchRowTimeIndicator; +import static org.apache.flink.table.planner.plan.utils.WindowUtil.groupingContainsWindowStartEnd; + +/** + * Traverses a {@link RelNode} tree and converts fields with {@link TimeIndicatorRelDataType} type. + * If a time attribute is accessed for a calculation, it will be materialized. Forwarding is allowed + * in some cases, but not all. + */ +public final class RelTimeIndicatorConverter implements RelShuttle { + + private final RexBuilder rexBuilder; + + private RelTimeIndicatorConverter(RexBuilder rexBuilder) { + this.rexBuilder = rexBuilder; + } + + public static RelNode convert( + RelNode rootRel, RexBuilder rexBuilder, boolean needFinalTimeIndicatorConversion) { + RelTimeIndicatorConverter converter = new RelTimeIndicatorConverter(rexBuilder); + RelNode convertedRoot = rootRel.accept(converter); + + // LogicalLegacySink and LogicalSink are already converted + if (rootRel instanceof LogicalLegacySink + || rootRel instanceof LogicalSink + || !needFinalTimeIndicatorConversion) { + return convertedRoot; + } + // materialize remaining procTime indicators + return converter.materializeProcTime(convertedRoot); + } + + @Override + public RelNode visit(LogicalIntersect intersect) { + return visitSetOp(intersect); + } + + @Override + public RelNode visit(LogicalUnion union) { + return visitSetOp(union); + } + + @Override + public RelNode visit(LogicalMinus minus) { + return visitSetOp(minus); + } + + @Override + public RelNode visit(LogicalAggregate aggregate) { + return visitAggregate(aggregate); + } + + @Override + public RelNode visit(LogicalSort sort) { + return visitSimpleRel(sort); + } + + @Override + public RelNode visit(LogicalMatch match) { + RelNode newInput = match.getInput().accept(this); + RexTimeIndicatorMaterializer materializer = new RexTimeIndicatorMaterializer(newInput); + + Function<Map<String, RexNode>, Map<String, RexNode>> materializeExprs = + rexNodesMap -> + rexNodesMap.entrySet().stream() + .collect( + Collectors.toMap( + Map.Entry::getKey, + e -> e.getValue().accept(materializer), + (e1, e2) -> e1, + LinkedHashMap::new)); + // update input expressions + Map<String, RexNode> newPatternDefs = materializeExprs.apply(match.getPatternDefinitions()); + Map<String, RexNode> newMeasures = materializeExprs.apply(match.getMeasures()); + RexNode newInterval = null; + if (match.getInterval() != null) { + newInterval = match.getInterval().accept(materializer); + } + + Predicate<String> isNoLongerTimeIndicator = + fieldName -> { + RexNode newMeasure = newMeasures.get(fieldName); + if (newMeasure == null) { + return false; + } else { + return !isTimeIndicatorType(newMeasure.getType()); + } + }; + + // decide the MATCH_ROWTIME() return type is TIMESTAMP or TIMESTAMP_LTZ, if it is + // TIMESTAMP_LTZ, we need to materialize the output type of LogicalMatch node to + // TIMESTAMP_LTZ too. + boolean isLtzRowtimeIndicator = + newMeasures.values().stream() + .anyMatch( + node -> + isTimestampLtzIndicatorType(node.getType()) + && isRowtimeIndicatorType(node.getType())); + // materialize all output types + RelDataType newOutputType = + getRowTypeWithoutTimeIndicator( + match.getRowType(), isLtzRowtimeIndicator, isNoLongerTimeIndicator); + return new LogicalMatch( + match.getCluster(), + match.getTraitSet(), + newInput, + newOutputType, + match.getPattern(), + match.isStrictStart(), + match.isStrictEnd(), + newPatternDefs, + newMeasures, + match.getAfter(), + match.getSubsets(), + match.isAllRows(), + match.getPartitionKeys(), + match.getOrderKeys(), + newInterval); + } + + @Override + public RelNode visit(RelNode node) { + if (node instanceof Collect) { Review comment: make sense -- This is an automated message from the Apache Git Service. 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