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.cassandra.schema;
  
  public enum Difference
  {
      /**
       * Two schema objects are considered to differ DEEP-ly if one or more of their nested schema objects differ.
       *
       * For example, if a table T has a column c of type U, where U is a user defined type, then upon altering U table
       * T0 (before alter) will differ DEEP-ly from table T1 (after alter).
       */
      DEEP,
  
      /**
       *
       * Two schema objects are considered to differ DEEP-ly if their direct structure is altered.
       *
       * For example, if a table T is altered to add a new column, a different compaction strategy, or a new description,
       * then it will differ SHALLOW-ly from the original.
       */
      SHALLOW
  }
  