com.hazelcast.org.apache.calcite.adapter.enumerable.EnumerableTableSpoolRule 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.adapter.enumerable;
import com.hazelcast.org.apache.calcite.linq4j.function.Experimental;
import com.hazelcast.org.apache.calcite.plan.Convention;
import com.hazelcast.org.apache.calcite.rel.RelNode;
import com.hazelcast.org.apache.calcite.rel.convert.ConverterRule;
import com.hazelcast.org.apache.calcite.rel.logical.LogicalTableSpool;
/**
* Rule to convert a {@link LogicalTableSpool} into an
* {@link EnumerableTableSpool}.
*
* NOTE: The current API is experimental and subject to change without
* notice.
*/
@Experimental
public class EnumerableTableSpoolRule extends ConverterRule {
EnumerableTableSpoolRule() {
super(LogicalTableSpool.class,
Convention.NONE,
EnumerableConvention.INSTANCE,
"EnumerableTableSpoolRule");
}
@Override public RelNode convert(RelNode rel) {
LogicalTableSpool spool = (LogicalTableSpool) rel;
return EnumerableTableSpool.create(
convert(spool.getInput(),
spool.getInput().getTraitSet().replace(EnumerableConvention.INSTANCE)),
spool.readType,
spool.writeType,
spool.getTable());
}
}