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IgniteColocatedAggregateBase.java
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IgniteColocatedAggregateBase.java
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/*
* 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.ignite.internal.sql.engine.rel.agg;
import java.util.List;
import org.apache.calcite.plan.RelOptCluster;
import org.apache.calcite.plan.RelTraitSet;
import org.apache.calcite.rel.RelDistribution;
import org.apache.calcite.rel.RelInput;
import org.apache.calcite.rel.RelNode;
import org.apache.calcite.rel.core.AggregateCall;
import org.apache.calcite.util.ImmutableBitSet;
import org.apache.calcite.util.Pair;
import org.apache.ignite.internal.sql.engine.rel.IgniteAggregate;
import org.apache.ignite.internal.sql.engine.rel.IgniteConvention;
import org.apache.ignite.internal.sql.engine.trait.IgniteDistribution;
import org.apache.ignite.internal.sql.engine.trait.IgniteDistributions;
import org.apache.ignite.internal.sql.engine.trait.TraitUtils;
import org.apache.ignite.internal.sql.engine.trait.TraitsAwareIgniteRel;
import org.apache.ignite.internal.sql.engine.util.Commons;
/**
* IgniteSingleAggregateBase.
* TODO Documentation https://issues.apache.org/jira/browse/IGNITE-15859
*/
public abstract class IgniteColocatedAggregateBase extends IgniteAggregate implements TraitsAwareIgniteRel {
/** {@inheritDoc} */
IgniteColocatedAggregateBase(
RelOptCluster cluster,
RelTraitSet traitSet,
RelNode input,
ImmutableBitSet groupSet,
List<ImmutableBitSet> groupSets,
List<AggregateCall> aggCalls
) {
super(cluster, traitSet, input, groupSet, groupSets, aggCalls);
}
/**
* Constructor used for deserialization.
*
* @param input Serialized representation.
*/
IgniteColocatedAggregateBase(RelInput input) {
super(TraitUtils.changeTraits(input, IgniteConvention.INSTANCE));
}
/** {@inheritDoc} */
@Override
public Pair<RelTraitSet, List<RelTraitSet>> passThroughDistribution(RelTraitSet nodeTraits,
List<RelTraitSet> inTraits) {
if (TraitUtils.distribution(nodeTraits) == IgniteDistributions.single()) {
return Pair.of(nodeTraits, Commons.transform(inTraits, t -> t.replace(IgniteDistributions.single())));
}
return null;
}
/** {@inheritDoc} */
@Override
public List<Pair<RelTraitSet, List<RelTraitSet>>> deriveRewindability(
RelTraitSet nodeTraits,
List<RelTraitSet> inputTraits
) {
return List.of(Pair.of(nodeTraits, List.of(inputTraits.get(0))));
}
/** {@inheritDoc} */
@Override
public List<Pair<RelTraitSet, List<RelTraitSet>>> deriveDistribution(
RelTraitSet nodeTraits,
List<RelTraitSet> inputTraits
) {
IgniteDistribution inDistribution = TraitUtils.distribution(inputTraits.get(0));
if (inDistribution.satisfies(IgniteDistributions.single())) {
return List.of(Pair.of(nodeTraits.replace(IgniteDistributions.single()), inputTraits));
}
if (inDistribution.getType() == RelDistribution.Type.HASH_DISTRIBUTED) {
for (Integer key : inDistribution.getKeys()) {
if (!groupSet.get(key)) {
return List.of();
}
}
// Group set contains all distribution keys, shift distribution keys according to used columns.
IgniteDistribution outDistribution = inDistribution.apply(Commons.trimmingMapping(rowType.getFieldCount(), groupSet));
return List.of(Pair.of(nodeTraits.replace(outDistribution), inputTraits));
}
return List.of();
}
/** {@inheritDoc} */
@Override
public List<Pair<RelTraitSet, List<RelTraitSet>>> deriveCorrelation(
RelTraitSet nodeTraits,
List<RelTraitSet> inTraits
) {
return List.of(Pair.of(nodeTraits.replace(TraitUtils.correlation(inTraits.get(0))),
inTraits));
}
}