All Downloads are FREE. Search and download functionalities are using the official Maven repository.

com.hazelcast.org.apache.calcite.plan.RelOptCluster Maven / Gradle / Ivy

There is a newer version: 5.5.0
Show newest version
/*
 * 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 com.hazelcast.org.apache.calcite.plan;

import com.hazelcast.org.apache.calcite.rel.RelNode;
import com.hazelcast.org.apache.calcite.rel.core.CorrelationId;
import com.hazelcast.org.apache.calcite.rel.hint.HintStrategyTable;
import com.hazelcast.org.apache.calcite.rel.metadata.DefaultRelMetadataProvider;
import com.hazelcast.org.apache.calcite.rel.metadata.JaninoRelMetadataProvider;
import com.hazelcast.org.apache.calcite.rel.metadata.MetadataFactory;
import com.hazelcast.org.apache.calcite.rel.metadata.RelMetadataProvider;
import com.hazelcast.org.apache.calcite.rel.metadata.RelMetadataQuery;
import com.hazelcast.org.apache.calcite.rel.metadata.RelMetadataQueryBase;
import com.hazelcast.org.apache.calcite.rel.type.RelDataTypeFactory;
import com.hazelcast.org.apache.calcite.rex.RexBuilder;
import com.hazelcast.org.apache.calcite.rex.RexNode;

import com.hazelcast.org.checkerframework.checker.initialization.qual.UnknownInitialization;
import com.hazelcast.org.checkerframework.checker.nullness.qual.EnsuresNonNull;
import com.hazelcast.org.checkerframework.checker.nullness.qual.Nullable;

import java.util.HashMap;
import java.util.Map;
import java.util.Objects;
import java.util.concurrent.atomic.AtomicInteger;
import java.util.function.Supplier;

import static com.hazelcast.org.apache.calcite.linq4j.Nullness.castNonNull;

/**
 * An environment for related relational expressions during the
 * optimization of a query.
 */
public class RelOptCluster {
  //~ Instance fields --------------------------------------------------------

  private final RelDataTypeFactory typeFactory;
  private final RelOptPlanner planner;
  private final AtomicInteger nextCorrel;
  private final Map mapCorrelToRel;
  private RexNode originalExpression;
  private final RexBuilder rexBuilder;
  private RelMetadataProvider metadataProvider;
  @Deprecated // to be removed before 2.0
  private MetadataFactory metadataFactory;
  private @Nullable HintStrategyTable hintStrategies;
  private final RelTraitSet emptyTraitSet;
  private @Nullable RelMetadataQuery mq;
  private Supplier mqSupplier;

  //~ Constructors -----------------------------------------------------------

  /**
   * Creates a cluster.
   */
  @Deprecated // to be removed before 2.0
  RelOptCluster(
      RelOptQuery query,
      RelOptPlanner planner,
      RelDataTypeFactory typeFactory,
      RexBuilder rexBuilder) {
    this(planner, typeFactory, rexBuilder, query.nextCorrel,
        query.mapCorrelToRel);
  }

  /**
   * Creates a cluster.
   *
   * 

For use only from {@link #create} and {@link RelOptQuery}. */ RelOptCluster(RelOptPlanner planner, RelDataTypeFactory typeFactory, RexBuilder rexBuilder, AtomicInteger nextCorrel, Map mapCorrelToRel) { this.nextCorrel = nextCorrel; this.mapCorrelToRel = mapCorrelToRel; this.planner = Objects.requireNonNull(planner, "planner"); this.typeFactory = Objects.requireNonNull(typeFactory, "typeFactory"); this.rexBuilder = rexBuilder; this.originalExpression = rexBuilder.makeLiteral("?"); // set up a default rel metadata provider, // giving the planner first crack at everything setMetadataProvider(DefaultRelMetadataProvider.INSTANCE); setMetadataQuerySupplier(RelMetadataQuery::instance); this.emptyTraitSet = planner.emptyTraitSet(); assert emptyTraitSet.size() == planner.getRelTraitDefs().size(); } /** Creates a cluster. */ public static RelOptCluster create(RelOptPlanner planner, RexBuilder rexBuilder) { return new RelOptCluster(planner, rexBuilder.getTypeFactory(), rexBuilder, new AtomicInteger(0), new HashMap<>()); } //~ Methods ---------------------------------------------------------------- @Deprecated // to be removed before 2.0 public RelOptQuery getQuery() { return new RelOptQuery(castNonNull(planner), nextCorrel, mapCorrelToRel); } @Deprecated // to be removed before 2.0 public RexNode getOriginalExpression() { return originalExpression; } @Deprecated // to be removed before 2.0 public void setOriginalExpression(RexNode originalExpression) { this.originalExpression = originalExpression; } public RelOptPlanner getPlanner() { return planner; } public RelDataTypeFactory getTypeFactory() { return typeFactory; } public RexBuilder getRexBuilder() { return rexBuilder; } public @Nullable RelMetadataProvider getMetadataProvider() { return metadataProvider; } /** * Overrides the default metadata provider for this cluster. * * @param metadataProvider custom provider */ @EnsuresNonNull({"this.metadataProvider", "this.metadataFactory"}) @SuppressWarnings("deprecation") public void setMetadataProvider( @UnknownInitialization RelOptCluster this, RelMetadataProvider metadataProvider) { this.metadataProvider = metadataProvider; this.metadataFactory = new com.hazelcast.org.apache.calcite.rel.metadata.MetadataFactoryImpl(metadataProvider); // Wrap the metadata provider as a JaninoRelMetadataProvider // and set it to the ThreadLocal, // JaninoRelMetadataProvider is required by the RelMetadataQuery. RelMetadataQueryBase.THREAD_PROVIDERS .set(JaninoRelMetadataProvider.of(metadataProvider)); } /** * Returns a {@link MetadataFactory}. * * @deprecated Use {@link #getMetadataQuery()}. */ @Deprecated // to be removed before 2.0 public MetadataFactory getMetadataFactory() { return metadataFactory; } /** * Sets up the customized {@link RelMetadataQuery} instance supplier that to * use during rule planning. * *

Note that the {@code mqSupplier} should return * a fresh new {@link RelMetadataQuery} instance because the instance would be * cached in this cluster, and we may invalidate and re-generate it * for each {@link RelOptRuleCall} cycle. */ @EnsuresNonNull("this.mqSupplier") public void setMetadataQuerySupplier( @UnknownInitialization RelOptCluster this, Supplier mqSupplier) { this.mqSupplier = mqSupplier; } /** * Returns the current RelMetadataQuery. * *

This method might be changed or moved in future. * If you have a {@link RelOptRuleCall} available, * for example if you are in a {@link RelOptRule#onMatch(RelOptRuleCall)} * method, then use {@link RelOptRuleCall#getMetadataQuery()} instead. */ public RelMetadataQuery getMetadataQuery() { if (mq == null) { mq = castNonNull(mqSupplier).get(); } return mq; } /** * Returns the supplier of RelMetadataQuery. */ public Supplier getMetadataQuerySupplier() { return this.mqSupplier; } /** * Should be called whenever the current {@link RelMetadataQuery} becomes * invalid. Typically invoked from {@link RelOptRuleCall#transformTo}. */ public void invalidateMetadataQuery() { mq = null; } /** * Sets up the hint propagation strategies to be used during rule planning. * *

Use RelOptNode.getCluster().getHintStrategies() to fetch * the hint strategies. * *

Note that this method is only for internal use; the cluster {@code hintStrategies} * would be always set up with the instance configured by * {@link com.hazelcast.org.apache.calcite.sql2rel.SqlToRelConverter.Config}. * * @param hintStrategies The specified hint strategies to override the default one(empty) */ public void setHintStrategies(HintStrategyTable hintStrategies) { Objects.requireNonNull(hintStrategies, "hintStrategies"); this.hintStrategies = hintStrategies; } /** * Returns the hint strategies of this cluster. It is immutable during the whole planning phrase. */ public HintStrategyTable getHintStrategies() { if (this.hintStrategies == null) { this.hintStrategies = HintStrategyTable.EMPTY; } return this.hintStrategies; } /** * Constructs a new id for a correlating variable. It is unique within the * whole query. */ public CorrelationId createCorrel() { return new CorrelationId(nextCorrel.getAndIncrement()); } /** Returns the default trait set for this cluster. */ public RelTraitSet traitSet() { return emptyTraitSet; } // CHECKSTYLE: IGNORE 2 /** @deprecated For {@code traitSetOf(t1, t2)}, * use {@link #traitSet}().replace(t1).replace(t2). */ @Deprecated // to be removed before 2.0 public RelTraitSet traitSetOf(RelTrait... traits) { RelTraitSet traitSet = emptyTraitSet; for (RelTrait trait : traits) { traitSet = traitSet.replace(trait); } return traitSet; } public RelTraitSet traitSetOf(RelTrait trait) { return emptyTraitSet.replace(trait); } }





© 2015 - 2024 Weber Informatics LLC | Privacy Policy