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.avatica.util;
  
  /** Syntax for quoting identifiers in SQL statements. */
  public enum Quoting {
    /** Quote identifiers in double-quotes, and use double-quote to escape
     * double-quotes. For example, {@code "my ""id"""}. */
    DOUBLE_QUOTE("\""),
  
    /** Quote identifiers in double-quotes, and use backslash to escape
     * double-quotes. For example, {@code "my \"id\""}. */
    DOUBLE_QUOTE_BACKSLASH("\""),
  
    /** Quote identifiers in single-quotes, and use single-quotes to escape
     * single-quotes. For example, {@code 'my ''id'''}. */
    SINGLE_QUOTE("`"),
  
    /** Quote identifiers in single-quotes, and use backslash to escape
     * single-quotes. For example, {@code 'my \'id\''}. */
    SINGLE_QUOTE_BACKSLASH("`"),
  
    /** Quote identifiers in back-quotes, and use back-quotes to escape
     * back-quotes. For example, {@code `my ``id```}. */
    BACK_TICK("`"),
  
    /** Quote identifiers in back-quotes, and use backslash to escape
     * back-quotes. For example, {@code `my \`id\``}. */
    BACK_TICK_BACKSLASH("`"),
  
    /** Quote identifiers in brackets. For example, {@code [my id]}. */
    BRACKET("[");
  
    public String string;
  
    Quoting(String string) {
      this.string = string;
    }
  }
  
  // End Quoting.java
  