content: /*
   * Copyright 1999-2017 Alibaba Group Holding Ltd.
   *
   * Licensed 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 com.alibaba.druid.sql.ast.statement;
  
  public enum SQLUnionOperator {
      UNION("UNION"),
      UNION_ALL("UNION ALL"),
      MINUS("MINUS"),
      MINUS_DISTINCT("MINUS DISTINCT"),
      MINUS_ALL("MINUS ALL"),
      EXCEPT("EXCEPT"),
      EXCEPT_ALL("EXCEPT ALL"),
      EXCEPT_DISTINCT("EXCEPT DISTINCT"),
      INTERSECT("INTERSECT"),
      INTERSECT_ALL("INTERSECT ALL"),
      INTERSECT_DISTINCT("INTERSECT DISTINCT"),
      DISTINCT("UNION DISTINCT");
  
      public final String name;
      public final String nameLCase;
  
      private SQLUnionOperator(String name) {
          this.name = name;
          this.nameLCase = name.toLowerCase();
      }
  
      public String toString() {
          return name;
      }
  }
  