com.hazelcast.org.apache.calcite.interpreter.NoneToBindableConverterRule 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.interpreter;
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.RelFactories;
import com.hazelcast.org.apache.calcite.tools.RelBuilderFactory;
import java.util.function.Predicate;
/**
* Rule to convert a relational expression from
* {@link com.hazelcast.org.apache.calcite.plan.Convention#NONE}
* to {@link com.hazelcast.org.apache.calcite.interpreter.BindableConvention}.
*/
public class NoneToBindableConverterRule extends ConverterRule {
public static final ConverterRule INSTANCE =
new NoneToBindableConverterRule(RelFactories.LOGICAL_BUILDER);
/**
* Creates a NoneToBindableConverterRule.
*
* @param relBuilderFactory Builder for relational expressions
*/
public NoneToBindableConverterRule(RelBuilderFactory relBuilderFactory) {
super(RelNode.class, (Predicate) r -> true, Convention.NONE,
BindableConvention.INSTANCE, relBuilderFactory,
"NoneToBindableConverterRule");
}
@Override public RelNode convert(RelNode rel) {
RelTraitSet newTraitSet = rel.getTraitSet().replace(getOutConvention());
return new InterpretableConverter(rel.getCluster(), newTraitSet, rel);
}
}