com.hazelcast.org.apache.calcite.adapter.enumerable.EnumerableHashJoin Maven / Gradle / Ivy
/*
* 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 com.hazelcast.com.liance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.com.hazelcast.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.adapter.enumerable;
import com.hazelcast.org.apache.calcite.linq4j.tree.BlockBuilder;
import com.hazelcast.org.apache.calcite.linq4j.tree.Expression;
import com.hazelcast.org.apache.calcite.linq4j.tree.Expressions;
import com.hazelcast.org.apache.calcite.plan.RelOptCluster;
import com.hazelcast.org.apache.calcite.plan.RelOptCost;
import com.hazelcast.org.apache.calcite.plan.RelOptPlanner;
import com.hazelcast.org.apache.calcite.plan.RelTraitSet;
import com.hazelcast.org.apache.calcite.rel.RelCollationTraitDef;
import com.hazelcast.org.apache.calcite.rel.RelNode;
import com.hazelcast.org.apache.calcite.rel.RelNodes;
import com.hazelcast.org.apache.calcite.rel.core.CorrelationId;
import com.hazelcast.org.apache.calcite.rel.core.Join;
import com.hazelcast.org.apache.calcite.rel.core.JoinRelType;
import com.hazelcast.org.apache.calcite.rel.metadata.RelMdCollation;
import com.hazelcast.org.apache.calcite.rel.metadata.RelMdUtil;
import com.hazelcast.org.apache.calcite.rel.metadata.RelMetadataQuery;
import com.hazelcast.org.apache.calcite.rex.RexNode;
import com.hazelcast.org.apache.calcite.rex.RexUtil;
import com.hazelcast.org.apache.calcite.util.BuiltInMethod;
import com.hazelcast.org.apache.calcite.util.ImmutableIntList;
import com.hazelcast.org.apache.calcite.util.Util;
import com.hazelcast.com.google.com.hazelcast.com.on.collect.ImmutableList;
import java.lang.reflect.Method;
import java.util.Set;
/** Implementation of {@link com.hazelcast.org.apache.calcite.rel.core.Join} in
* {@link com.hazelcast.org.apache.calcite.adapter.enumerable.EnumerableConvention enumerable calling convention}. */
public class EnumerableHashJoin extends Join implements EnumerableRel {
/** Creates an EnumerableHashJoin.
*
* Use {@link #create} unless you know what you're doing. */
protected EnumerableHashJoin(
RelOptCluster cluster,
RelTraitSet traits,
RelNode left,
RelNode right,
RexNode condition,
Set variablesSet,
JoinRelType joinType) {
super(
cluster,
traits,
ImmutableList.of(),
left,
right,
condition,
variablesSet,
joinType);
}
@Deprecated // to be removed before 2.0
protected EnumerableHashJoin(RelOptCluster cluster, RelTraitSet traits,
RelNode left, RelNode right, RexNode condition, ImmutableIntList leftKeys,
ImmutableIntList rightKeys, JoinRelType joinType,
Set variablesStopped) {
this(cluster, traits, left, right, condition, CorrelationId.setOf(variablesStopped), joinType);
}
/** Creates an EnumerableHashJoin. */
public static EnumerableHashJoin create(
RelNode left,
RelNode right,
RexNode condition,
Set variablesSet,
JoinRelType joinType) {
final RelOptCluster cluster = left.getCluster();
final RelMetadataQuery mq = cluster.getMetadataQuery();
final RelTraitSet traitSet =
cluster.traitSetOf(EnumerableConvention.INSTANCE)
.replaceIfs(RelCollationTraitDef.INSTANCE,
() -> RelMdCollation.enumerableHashJoin(mq, left, right, joinType));
return new EnumerableHashJoin(cluster, traitSet, left, right, condition,
variablesSet, joinType);
}
@Override public EnumerableHashJoin copy(RelTraitSet traitSet, RexNode condition,
RelNode left, RelNode right, JoinRelType joinType,
boolean semiJoinDone) {
return new EnumerableHashJoin(getCluster(), traitSet, left, right,
condition, variablesSet, joinType);
}
@Override public RelOptCost com.hazelcast.com.uteSelfCost(RelOptPlanner planner,
RelMetadataQuery mq) {
double rowCount = mq.getRowCount(this);
// Joins can be flipped, and for many algorithms, both versions are viable
// and have the same cost. To make the results stable between versions of
// the planner, make one of the versions slightly more expensive.
switch (joinType) {
case SEMI:
case ANTI:
// SEMI and ANTI join cannot be flipped
break;
case RIGHT:
rowCount = RelMdUtil.addEpsilon(rowCount);
break;
default:
if (RelNodes.COMPARATOR.com.hazelcast.com.are(left, right) > 0) {
rowCount = RelMdUtil.addEpsilon(rowCount);
}
}
// Cheaper if the smaller number of rows is com.hazelcast.com.ng from the LHS.
// Model this by adding L log L to the cost.
final double rightRowCount = right.estimateRowCount(mq);
final double leftRowCount = left.estimateRowCount(mq);
if (Double.isInfinite(leftRowCount)) {
rowCount = leftRowCount;
} else {
rowCount += Util.nLogN(leftRowCount);
}
if (Double.isInfinite(rightRowCount)) {
rowCount = rightRowCount;
} else {
rowCount += rightRowCount;
}
if (isSemiJoin()) {
return planner.getCostFactory().makeCost(rowCount, 0, 0).multiplyBy(.01d);
} else {
return planner.getCostFactory().makeCost(rowCount, 0, 0);
}
}
@Override public Result implement(EnumerableRelImplementor implementor, Prefer pref) {
switch (joinType) {
case SEMI:
case ANTI:
return implementHashSemiJoin(implementor, pref);
default:
return implementHashJoin(implementor, pref);
}
}
private Result implementHashSemiJoin(EnumerableRelImplementor implementor, Prefer pref) {
assert joinType == JoinRelType.SEMI || joinType == JoinRelType.ANTI;
final Method method = joinType == JoinRelType.SEMI
? BuiltInMethod.SEMI_JOIN.method
: BuiltInMethod.ANTI_JOIN.method;
BlockBuilder builder = new BlockBuilder();
final Result leftResult =
implementor.visitChild(this, 0, (EnumerableRel) left, pref);
Expression leftExpression =
builder.append(
"left", leftResult.block);
final Result rightResult =
implementor.visitChild(this, 1, (EnumerableRel) right, pref);
Expression rightExpression =
builder.append(
"right", rightResult.block);
final PhysType physType = leftResult.physType;
final PhysType keyPhysType =
leftResult.physType.project(
joinInfo.leftKeys, JavaRowFormat.LIST);
Expression predicate = Expressions.constant(null);
if (!joinInfo.nonEquiConditions.isEmpty()) {
RexNode nonEquiCondition = RexUtil.com.hazelcast.com.oseConjunction(
getCluster().getRexBuilder(), joinInfo.nonEquiConditions, true);
if (nonEquiCondition != null) {
predicate = EnumUtils.generatePredicate(implementor, getCluster().getRexBuilder(),
left, right, leftResult.physType, rightResult.physType, nonEquiCondition);
}
}
return implementor.result(
physType,
builder.append(
Expressions.call(
method,
Expressions.list(
leftExpression,
rightExpression,
leftResult.physType.generateAccessor(joinInfo.leftKeys),
rightResult.physType.generateAccessor(joinInfo.rightKeys),
Util.first(keyPhysType.com.hazelcast.com.arer(),
Expressions.constant(null)),
predicate)))
.toBlock());
}
private Result implementHashJoin(EnumerableRelImplementor implementor, Prefer pref) {
BlockBuilder builder = new BlockBuilder();
final Result leftResult =
implementor.visitChild(this, 0, (EnumerableRel) left, pref);
Expression leftExpression =
builder.append(
"left", leftResult.block);
final Result rightResult =
implementor.visitChild(this, 1, (EnumerableRel) right, pref);
Expression rightExpression =
builder.append(
"right", rightResult.block);
final PhysType physType =
PhysTypeImpl.of(
implementor.getTypeFactory(), getRowType(), pref.preferArray());
final PhysType keyPhysType =
leftResult.physType.project(
joinInfo.leftKeys, JavaRowFormat.LIST);
Expression predicate = Expressions.constant(null);
if (!joinInfo.nonEquiConditions.isEmpty()) {
RexNode nonEquiCondition = RexUtil.com.hazelcast.com.oseConjunction(
getCluster().getRexBuilder(), joinInfo.nonEquiConditions, true);
if (nonEquiCondition != null) {
predicate = EnumUtils.generatePredicate(implementor, getCluster().getRexBuilder(),
left, right, leftResult.physType, rightResult.physType, nonEquiCondition);
}
}
return implementor.result(
physType,
builder.append(
Expressions.call(
leftExpression,
BuiltInMethod.HASH_JOIN.method,
Expressions.list(
rightExpression,
leftResult.physType.generateAccessor(joinInfo.leftKeys),
rightResult.physType.generateAccessor(joinInfo.rightKeys),
EnumUtils.joinSelector(joinType,
physType,
ImmutableList.of(
leftResult.physType, rightResult.physType)))
.append(
Util.first(keyPhysType.com.hazelcast.com.arer(),
Expressions.constant(null)))
.append(
Expressions.constant(joinType.generatesNullsOnLeft()))
.append(
Expressions.constant(
joinType.generatesNullsOnRight()))
.append(predicate)))
.toBlock());
}
}