| /* |
| * 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.tools; |
| |
| import org.apache.calcite.plan.RelOptLattice; |
| import org.apache.calcite.plan.RelOptMaterialization; |
| import org.apache.calcite.plan.RelOptPlanner; |
| import org.apache.calcite.plan.RelTraitSet; |
| import org.apache.calcite.rel.RelNode; |
| |
| import java.util.List; |
| |
| /** |
| * Program that transforms a relational expression into another relational |
| * expression. |
| * |
| * <p>A planner is a sequence of programs, each of which is sometimes called |
| * a "phase". |
| * The most typical program is an invocation of the volcano planner with a |
| * particular {@link org.apache.calcite.tools.RuleSet}.</p> |
| */ |
| public interface Program { |
| RelNode run(RelOptPlanner planner, RelNode rel, |
| RelTraitSet requiredOutputTraits, |
| List<RelOptMaterialization> materializations, |
| List<RelOptLattice> lattices); |
| } |