/*
 * 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. For example, {@code "my id"}. */
  DOUBLE_QUOTE("\""),

  /** Quote identifiers in back-quotes. For example, {@code `my id`}. */
  BACK_TICK("`"),

  /** Quote identifiers in brackets. For example, {@code [my id]}. */
  BRACKET("[");

  public String string;

  Quoting(String string) {
    this.string = string;
  }
}

// End Quoting.java

@@ -938,16 +938,67 @@
 fiers in
+ double-quotes, and use double-quote to escape%0A   *
  double-
@@ -1029,18 +1029,22 @@
 ode %22my 
-id
+%22%22id%22%22
 %22%7D. */%0A 
@@ -1096,65 +1096,741 @@
  in 
-back-quotes. For example, %7B@code %60my id%60%7D. */%0A  BACK_TICK
+double-quotes, and use backslash to escape%0A   * double-quotes. For example, %7B@code %22my %5C%22id%5C%22%22%7D. */%0A  DOUBLE_QUOTE_BACKSLASH(%22%5C%22%22),%0A%0A  /** Quote identifiers in single-quotes, and use single-quotes to escape%0A   * single-quotes. For example, %7B@code 'my ''id'''%7D. */%0A  SINGLE_QUOTE(%22%60%22),%0A%0A  /** Quote identifiers in single-quotes, and use backslash to escape%0A   * single-quotes. For example, %7B@code 'my %5C'id%5C''%7D. */%0A  SINGLE_QUOTE_BACKSLASH(%22%60%22),%0A%0A  /** Quote identifiers in back-quotes, and use back-quotes to escape%0A   * back-quotes. For example, %7B@code %60my %60%60id%60%60%60%7D. */%0A  BACK_TICK(%22%60%22),%0A%0A  /** Quote identifiers in back-quotes, and use backslash to escape%0A   * back-quotes. For example, %7B@code %60my %5C%60id%5C%60%60%7D. */%0A  BACK_TICK_BACKSLASH
 (%22%60%22

Add Quoting.BACK_TICK_BACKSLASH (Jack Scott)