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 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 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.checkerframework.checker.nullness.qual.Nullable;
/**
* 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}.
*
* @see Bindables#FROM_NONE_RULE
*/
public class NoneToBindableConverterRule extends ConverterRule {
/** Default configuration. */
public static final Config DEFAULT_CONFIG = Config.INSTANCE
.withConversion(RelNode.class, Convention.NONE,
BindableConvention.INSTANCE, "NoneToBindableConverterRule")
.withRuleFactory(NoneToBindableConverterRule::new);
/** Called from the Config. */
protected NoneToBindableConverterRule(Config config) {
super(config);
}
@Override public @Nullable RelNode convert(RelNode rel) {
RelTraitSet newTraitSet = rel.getTraitSet().replace(getOutConvention());
return new InterpretableConverter(rel.getCluster(), newTraitSet, rel);
}
}