Mark-Zeng commented on a change in pull request #12232: URL: https://github.com/apache/beam/pull/12232#discussion_r454919860
########## File path: sdks/java/extensions/sql/src/main/java/org/apache/beam/sdk/extensions/sql/impl/rel/BeamMatchRel.java ########## @@ -0,0 +1,380 @@ +/* + * 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.beam.sdk.extensions.sql.impl.rel; + +import static org.apache.beam.vendor.calcite.v1_20_0.com.google.common.base.Preconditions.checkArgument; + +import java.util.ArrayList; +import java.util.Collections; +import java.util.Comparator; +import java.util.List; +import java.util.Map; +import java.util.SortedSet; +import java.util.regex.Matcher; +import java.util.regex.Pattern; +import org.apache.beam.sdk.coders.KvCoder; +import org.apache.beam.sdk.coders.RowCoder; +import org.apache.beam.sdk.extensions.sql.impl.SqlConversionException; +import org.apache.beam.sdk.extensions.sql.impl.cep.CEPPattern; +import org.apache.beam.sdk.extensions.sql.impl.cep.CEPUtil; +import org.apache.beam.sdk.extensions.sql.impl.cep.OrderKey; +import org.apache.beam.sdk.extensions.sql.impl.planner.BeamCostModel; +import org.apache.beam.sdk.extensions.sql.impl.planner.NodeStats; +import org.apache.beam.sdk.schemas.Schema; +import org.apache.beam.sdk.transforms.DoFn; +import org.apache.beam.sdk.transforms.GroupByKey; +import org.apache.beam.sdk.transforms.PTransform; +import org.apache.beam.sdk.transforms.ParDo; +import org.apache.beam.sdk.values.KV; +import org.apache.beam.sdk.values.PCollection; +import org.apache.beam.sdk.values.PCollectionList; +import org.apache.beam.sdk.values.Row; +import org.apache.beam.vendor.calcite.v1_20_0.org.apache.calcite.plan.RelOptCluster; +import org.apache.beam.vendor.calcite.v1_20_0.org.apache.calcite.plan.RelOptPlanner; +import org.apache.beam.vendor.calcite.v1_20_0.org.apache.calcite.plan.RelTraitSet; +import org.apache.beam.vendor.calcite.v1_20_0.org.apache.calcite.rel.RelCollation; +import org.apache.beam.vendor.calcite.v1_20_0.org.apache.calcite.rel.RelFieldCollation; +import org.apache.beam.vendor.calcite.v1_20_0.org.apache.calcite.rel.RelNode; +import org.apache.beam.vendor.calcite.v1_20_0.org.apache.calcite.rel.core.Match; +import org.apache.beam.vendor.calcite.v1_20_0.org.apache.calcite.rel.metadata.RelMetadataQuery; +import org.apache.beam.vendor.calcite.v1_20_0.org.apache.calcite.rel.type.RelDataType; +import org.apache.beam.vendor.calcite.v1_20_0.org.apache.calcite.rex.RexCall; +import org.apache.beam.vendor.calcite.v1_20_0.org.apache.calcite.rex.RexNode; +import org.apache.beam.vendor.calcite.v1_20_0.org.apache.calcite.rex.RexVariable; +import org.slf4j.Logger; +import org.slf4j.LoggerFactory; + +/** {@link BeamRelNode} to replace a {@link Match} node. */ +public class BeamMatchRel extends Match implements BeamRelNode { + + public static final Logger LOG = LoggerFactory.getLogger(BeamMatchRel.class); + + public BeamMatchRel( + RelOptCluster cluster, + RelTraitSet traitSet, + RelNode input, + RelDataType rowType, + RexNode pattern, + boolean strictStart, + boolean strictEnd, + Map<String, RexNode> patternDefinitions, + Map<String, RexNode> measures, + RexNode after, + Map<String, ? extends SortedSet<String>> subsets, + boolean allRows, + List<RexNode> partitionKeys, + RelCollation orderKeys, + RexNode interval) { + + super( + cluster, + traitSet, + input, + rowType, + pattern, + strictStart, + strictEnd, + patternDefinitions, + measures, + after, + subsets, + allRows, + partitionKeys, + orderKeys, + interval); + } + + @Override + public BeamCostModel beamComputeSelfCost(RelOptPlanner planner, RelMetadataQuery mq) { + return BeamCostModel.FACTORY.makeTinyCost(); // return constant costModel for now + } + + @Override + public NodeStats estimateNodeStats(RelMetadataQuery mq) { + // a simple way of getting some estimate data + // to be examined further + NodeStats inputEstimate = BeamSqlRelUtils.getNodeStats(input, mq); + double numRows = inputEstimate.getRowCount(); + double winSize = inputEstimate.getWindow(); + double rate = inputEstimate.getRate(); + + return NodeStats.create(numRows, rate, winSize).multiply(0.5); + } + + @Override + public PTransform<PCollectionList<Row>, PCollection<Row>> buildPTransform() { + + return new MatchTransform(partitionKeys, orderKeys, pattern, patternDefinitions); + } + + private static class MatchTransform extends PTransform<PCollectionList<Row>, PCollection<Row>> { + + private final List<RexNode> parKeys; + private final RelCollation orderKeys; + private final RexNode pattern; + private final Map<String, RexNode> patternDefs; + + public MatchTransform( + List<RexNode> parKeys, + RelCollation orderKeys, + RexNode pattern, + Map<String, RexNode> patternDefs) { + this.parKeys = parKeys; + this.orderKeys = orderKeys; + this.pattern = pattern; + this.patternDefs = patternDefs; + } + + @Override + public PCollection<Row> expand(PCollectionList<Row> pinput) { + checkArgument( + pinput.size() == 1, + "Wrong number of inputs for %s: %s", + BeamMatchRel.class.getSimpleName(), + pinput); + PCollection<Row> upstream = pinput.get(0); + + Schema collectionSchema = upstream.getSchema(); Review comment: Done. ---------------------------------------------------------------- This is an automated message from the Apache Git Service. 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