com.hazelcast.org.apache.calcite.adapter.enumerable.EnumerableSortedAggregateRule Maven / Gradle / Ivy
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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 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.plan.Convention;
import com.hazelcast.org.apache.calcite.plan.RelTraitSet;
import com.hazelcast.org.apache.calcite.rel.RelCollations;
import com.hazelcast.org.apache.calcite.rel.RelNode;
import com.hazelcast.org.apache.calcite.rel.convert.ConverterRule;
import com.hazelcast.org.apache.calcite.rel.core.Aggregate;
import com.hazelcast.org.apache.calcite.rel.logical.LogicalAggregate;
import com.hazelcast.org.apache.calcite.util.ImmutableIntList;
/**
* Rule to convert a {@link LogicalAggregate}
* to an {@link EnumerableSortedAggregate}.
*/
class EnumerableSortedAggregateRule extends ConverterRule {
EnumerableSortedAggregateRule() {
super(LogicalAggregate.class, Convention.NONE,
EnumerableConvention.INSTANCE, "EnumerableSortedAggregateRule");
}
public RelNode convert(RelNode rel) {
final LogicalAggregate agg = (LogicalAggregate) rel;
if (!Aggregate.isSimple(agg)) {
return null;
}
final RelTraitSet inputTraits = rel.getCluster()
.traitSet().replace(EnumerableConvention.INSTANCE)
.replace(
RelCollations.of(
ImmutableIntList.copyOf(
agg.getGroupSet().asList())));
final RelTraitSet selfTraits = inputTraits.replace(
RelCollations.of(
ImmutableIntList.identity(agg.getGroupSet().cardinality())));
return new EnumerableSortedAggregate(
rel.getCluster(),
selfTraits,
convert(agg.getInput(), inputTraits),
agg.getGroupSet(),
agg.getGroupSets(),
agg.getAggCallList());
}
}