| /* |
| * 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.flink.table.plan.nodes.physical |
| |
| import org.apache.flink.table.plan.nodes.FlinkRelNode |
| |
| import org.apache.calcite.plan.RelTraitSet |
| import org.apache.calcite.rel.RelNode |
| |
| /** |
| * Base class for flink physical node. |
| */ |
| trait FlinkPhysicalRel extends FlinkRelNode { |
| |
| /** |
| * Try to satisfy required traits by descendant of current node. If descendant can satisfy |
| * required traits, and current node will not destroy it, then returns the new node with |
| * converted inputs. |
| * |
| * @param requiredTraitSet required traits |
| * @return A converted node which satisfy required traits by inputs node of current node. |
| * Returns null if required traits cannot be pushed down into inputs. |
| */ |
| def satisfyTraitsByInput(requiredTraitSet: RelTraitSet): RelNode = null |
| |
| } |