wenlong88 commented on a change in pull request #14625: URL: https://github.com/apache/flink/pull/14625#discussion_r556995228
########## File path: flink-table/flink-table-planner-blink/src/main/java/org/apache/flink/table/planner/plan/nodes/exec/stream/StreamExecMatch.java ########## @@ -0,0 +1,453 @@ +/* + * 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.nodes.exec.stream; + +import org.apache.flink.annotation.VisibleForTesting; +import org.apache.flink.api.common.typeutils.TypeSerializer; +import org.apache.flink.api.dag.Transformation; +import org.apache.flink.api.java.tuple.Tuple2; +import org.apache.flink.cep.EventComparator; +import org.apache.flink.cep.nfa.aftermatch.AfterMatchSkipStrategy; +import org.apache.flink.cep.nfa.compiler.NFACompiler; +import org.apache.flink.cep.operator.CepOperator; +import org.apache.flink.cep.pattern.Pattern; +import org.apache.flink.cep.pattern.Quantifier; +import org.apache.flink.cep.pattern.conditions.BooleanConditions; +import org.apache.flink.cep.pattern.conditions.IterativeCondition; +import org.apache.flink.streaming.api.operators.ProcessOperator; +import org.apache.flink.streaming.api.transformations.OneInputTransformation; +import org.apache.flink.streaming.api.windowing.time.Time; +import org.apache.flink.table.api.TableConfig; +import org.apache.flink.table.api.TableException; +import org.apache.flink.table.data.RowData; +import org.apache.flink.table.planner.codegen.CodeGenUtils; +import org.apache.flink.table.planner.codegen.CodeGeneratorContext; +import org.apache.flink.table.planner.codegen.MatchCodeGenerator; +import org.apache.flink.table.planner.codegen.sort.ComparatorCodeGenerator; +import org.apache.flink.table.planner.delegation.PlannerBase; +import org.apache.flink.table.planner.plan.nodes.exec.ExecEdge; +import org.apache.flink.table.planner.plan.nodes.exec.ExecNode; +import org.apache.flink.table.planner.plan.nodes.exec.ExecNodeBase; +import org.apache.flink.table.planner.plan.nodes.exec.utils.MatchSpec; +import org.apache.flink.table.planner.plan.nodes.exec.utils.SortSpec; +import org.apache.flink.table.planner.plan.utils.KeySelectorUtil; +import org.apache.flink.table.planner.plan.utils.RexDefaultVisitor; +import org.apache.flink.table.planner.utils.JavaScalaConversionUtil; +import org.apache.flink.table.runtime.generated.GeneratedRecordComparator; +import org.apache.flink.table.runtime.keyselector.RowDataKeySelector; +import org.apache.flink.table.runtime.operators.match.PatternProcessFunctionRunner; +import org.apache.flink.table.runtime.operators.match.RowDataEventComparator; +import org.apache.flink.table.runtime.operators.match.RowtimeProcessFunction; +import org.apache.flink.table.runtime.typeutils.InternalTypeInfo; +import org.apache.flink.table.runtime.typeutils.TypeCheckUtils; +import org.apache.flink.table.types.logical.LogicalType; +import org.apache.flink.table.types.logical.RowType; +import org.apache.flink.table.types.logical.TimestampType; +import org.apache.flink.util.MathUtils; + +import org.apache.calcite.rex.RexCall; +import org.apache.calcite.rex.RexLiteral; +import org.apache.calcite.rex.RexNode; +import org.apache.calcite.sql.SqlMatchRecognize; +import org.apache.calcite.sql.SqlOperator; +import org.apache.calcite.sql.fun.SqlStdOperatorTable; +import org.apache.calcite.sql.type.SqlTypeFamily; +import org.apache.calcite.tools.RelBuilder; + +import java.util.ArrayList; +import java.util.Collections; +import java.util.LinkedHashSet; +import java.util.List; +import java.util.Optional; + +/** Stream {@link ExecNode} which matches along with LogicalMatch. */ +public class StreamExecMatch extends ExecNodeBase<RowData> implements StreamExecNode<RowData> { + + private final MatchSpec matchSpec; + + public StreamExecMatch( + MatchSpec matchSpec, ExecEdge inputEdge, RowType outputType, String description) { + super(Collections.singletonList(inputEdge), outputType, description); + this.matchSpec = matchSpec; + } + + @SuppressWarnings("unchecked") + @Override + protected Transformation<RowData> translateToPlanInternal(PlannerBase planner) { + final TableConfig config = planner.getTableConfig(); + final ExecNode<RowData> inputNode = (ExecNode<RowData>) getInputNodes().get(0); + final Transformation<RowData> inputTransform = inputNode.translateToPlan(planner); + final RowType inputRowType = (RowType) inputNode.getOutputType(); + + checkOrderKeys(inputRowType); + final EventComparator<RowData> eventComparator = + createEventComparator(config, inputRowType); + final Transformation<RowData> timestampedInputTransform = + translateOrder(inputTransform, inputRowType); + + final Tuple2<Pattern<RowData, RowData>, List<String>> cepPatternAndNames = + translatePattern(matchSpec, config, planner.getRelBuilder(), inputRowType); + final Pattern<RowData, RowData> cepPattern = cepPatternAndNames.f0; + + // TODO remove this once it is supported in CEP library + if (NFACompiler.canProduceEmptyMatches(cepPattern)) { + throw new TableException( + "Patterns that can produce empty matches are not supported. There must be at least one non-optional state."); + } + + // TODO remove this once it is supported in CEP library + if (cepPattern.getQuantifier().hasProperty(Quantifier.QuantifierProperty.GREEDY)) { + throw new TableException( + "Greedy quantifiers are not allowed as the last element of a Pattern yet. " + + "Finish your pattern with either a simple variable or reluctant quantifier."); + } + + if (matchSpec.isAllRows()) { + throw new TableException("All rows per match mode is not supported yet."); + } + + final int[] partitionKeys = matchSpec.getPartition().getFieldIndices(); + final SortSpec.SortFieldSpec timeOrderField = matchSpec.getOrderKeys().getFieldSpec(0); + final LogicalType timeOrderFieldType = + inputRowType.getTypeAt(timeOrderField.getFieldIndex()); + + final boolean isProctime = TypeCheckUtils.isProcTime(timeOrderFieldType); + final InternalTypeInfo<RowData> inputTypeInfo = + (InternalTypeInfo<RowData>) inputTransform.getOutputType(); + final TypeSerializer<RowData> inputSerializer = + inputTypeInfo.createSerializer(planner.getExecEnv().getConfig()); + final NFACompiler.NFAFactory<RowData> nfaFactory = + NFACompiler.compileFactory(cepPattern, false); + final MatchCodeGenerator generator = + new MatchCodeGenerator( + new CodeGeneratorContext(config), + planner.getRelBuilder(), + false, // nullableInput + JavaScalaConversionUtil.toScala(cepPatternAndNames.f1), + JavaScalaConversionUtil.toScala(Optional.empty()), + CodeGenUtils.DEFAULT_COLLECTOR_TERM()); + generator.bindInput( + inputRowType, + CodeGenUtils.DEFAULT_INPUT1_TERM(), + JavaScalaConversionUtil.toScala(Optional.empty())); + final PatternProcessFunctionRunner patternProcessFunction = + generator.generateOneRowPerMatchExpression( + (RowType) getOutputType(), partitionKeys, matchSpec.getMeasures()); + final CepOperator<RowData, RowData, RowData> operator = + new CepOperator<>( + inputSerializer, + isProctime, + nfaFactory, + eventComparator, + cepPattern.getAfterMatchSkipStrategy(), + patternProcessFunction, + null); + final OneInputTransformation<RowData, RowData> transform = + new OneInputTransformation<>( + timestampedInputTransform, + getDesc(), + operator, + InternalTypeInfo.of(getOutputType()), + timestampedInputTransform.getParallelism()); + final RowDataKeySelector selector = + KeySelectorUtil.getRowDataSelector(partitionKeys, inputTypeInfo); + transform.setStateKeySelector(selector); + transform.setStateKeyType(selector.getProducedType()); + + if (inputsContainSingleton()) { + transform.setParallelism(1); + transform.setMaxParallelism(1); + } + return transform; + } + + private void checkOrderKeys(RowType inputRowType) { + SortSpec orderKeys = matchSpec.getOrderKeys(); + if (orderKeys.getFieldIndices().length == 0) { Review comment: use orderKeys.getFieldSize() == 0 ? ---------------------------------------------------------------- This is an automated message from the Apache Git Service. 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