| /* |
| * 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 org.apache.calcite.adapter.enumerable; |
| |
| import org.apache.calcite.plan.Convention; |
| import org.apache.calcite.rel.RelNode; |
| import org.apache.calcite.rel.convert.ConverterRule; |
| import org.apache.calcite.rel.core.Correlate; |
| import org.apache.calcite.rel.logical.LogicalCorrelate; |
| |
| import org.immutables.value.Value; |
| |
| /** |
| * Implementation of nested loops over enumerable inputs. |
| * |
| * @see EnumerableRules#ENUMERABLE_CORRELATE_RULE |
| */ |
| @Value.Enclosing |
| public class EnumerableCorrelateRule extends ConverterRule { |
| /** Default configuration. */ |
| public static final Config DEFAULT_CONFIG = Config.INSTANCE |
| .withConversion(LogicalCorrelate.class, r -> true, Convention.NONE, |
| EnumerableConvention.INSTANCE, "EnumerableCorrelateRule") |
| .withRuleFactory(EnumerableCorrelateRule::new); |
| |
| /** Creates an EnumerableCorrelateRule. */ |
| protected EnumerableCorrelateRule(Config config) { |
| super(config); |
| } |
| |
| @Override public RelNode convert(RelNode rel) { |
| final Correlate c = (Correlate) rel; |
| return EnumerableCorrelate.create( |
| convert(c.getLeft(), c.getLeft().getTraitSet() |
| .replace(EnumerableConvention.INSTANCE)), |
| convert(c.getRight(), c.getRight().getTraitSet() |
| .replace(EnumerableConvention.INSTANCE)), |
| c.getCorrelationId(), |
| c.getRequiredColumns(), |
| c.getJoinType()); |
| } |
| } |