com.hazelcast.org.apache.calcite.adapter.enumerable.EnumerableCollectRule 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.plan.Convention;
import com.hazelcast.org.apache.calcite.plan.RelTraitSet;
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.Collect;
/**
* Rule to convert an {@link com.hazelcast.org.apache.calcite.rel.core.Collect} to an
* {@link EnumerableCollect}.
*/
class EnumerableCollectRule extends ConverterRule {
EnumerableCollectRule() {
super(Collect.class, Convention.NONE, EnumerableConvention.INSTANCE,
"EnumerableCollectRule");
}
public RelNode convert(RelNode rel) {
final Collect collect = (Collect) rel;
final RelTraitSet traitSet =
collect.getTraitSet().replace(EnumerableConvention.INSTANCE);
final RelNode input = collect.getInput();
return new EnumerableCollect(
rel.getCluster(),
traitSet,
convert(input,
input.getTraitSet().replace(EnumerableConvention.INSTANCE)),
collect.getFieldName());
}
}