content: /*
   * 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.rel;
  
  import org.apache.calcite.rel.core.TableFunctionScan;
  import org.apache.calcite.rel.core.TableScan;
  import org.apache.calcite.rel.logical.LogicalAggregate;
  import org.apache.calcite.rel.logical.LogicalAsofJoin;
  import org.apache.calcite.rel.logical.LogicalCalc;
  import org.apache.calcite.rel.logical.LogicalCorrelate;
  import org.apache.calcite.rel.logical.LogicalExchange;
  import org.apache.calcite.rel.logical.LogicalFilter;
  import org.apache.calcite.rel.logical.LogicalIntersect;
  import org.apache.calcite.rel.logical.LogicalJoin;
  import org.apache.calcite.rel.logical.LogicalMatch;
  import org.apache.calcite.rel.logical.LogicalMinus;
  import org.apache.calcite.rel.logical.LogicalProject;
  import org.apache.calcite.rel.logical.LogicalRepeatUnion;
  import org.apache.calcite.rel.logical.LogicalSort;
  import org.apache.calcite.rel.logical.LogicalTableModify;
  import org.apache.calcite.rel.logical.LogicalUnion;
  import org.apache.calcite.rel.logical.LogicalValues;
  
  /**
   * Visitor that has methods for the common logical relational expressions.
   */
  public interface RelShuttle {
    RelNode visit(TableScan scan);
  
    RelNode visit(TableFunctionScan scan);
  
    RelNode visit(LogicalValues values);
  
    RelNode visit(LogicalFilter filter);
  
    RelNode visit(LogicalCalc calc);
  
    RelNode visit(LogicalProject project);
  
    RelNode visit(LogicalJoin join);
  
    RelNode visit(LogicalCorrelate correlate);
  
    RelNode visit(LogicalUnion union);
  
    RelNode visit(LogicalIntersect intersect);
  
    RelNode visit(LogicalMinus minus);
  
    RelNode visit(LogicalAggregate aggregate);
  
    RelNode visit(LogicalMatch match);
  
    RelNode visit(LogicalSort sort);
  
    RelNode visit(LogicalExchange exchange);
  
    RelNode visit(LogicalTableModify modify);
  
    RelNode visit(LogicalAsofJoin logicalAsofJoin);
  
    RelNode visit(LogicalRepeatUnion logicalRepeatUnion);
  
    RelNode visit(RelNode other);
  }
  