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.mutable;
  
  /** Type of {@code MutableRel}. */
  enum MutableRelType {
    AGGREGATE,
    CALC,
    COLLECT,
    CORRELATE,
    EXCHANGE,
    FILTER,
    INTERSECT,
    JOIN,
    MATCH,
    MINUS,
    PROJECT,
    SAMPLE,
    SORT,
    TABLE_FUNCTION_SCAN,
    TABLE_MODIFY,
    TABLE_SCAN,
    UNCOLLECT,
    UNION,
    VALUES,
    WINDOW,
    HOLDER
  }
  