code: public static StringBuilder escapeIdentifier(StringBuilder sbuf, String value)
        throws SQLException {
      if (sbuf == null) {
        sbuf = new StringBuilder(2 + (value.length() + 10) / 10 * 11); // Add 10% for escaping.
      }
      doAppendEscapedIdentifier(sbuf, value);
      return sbuf;
    }
docs: Escape the given identifier <tt>value</tt> and append it to the string builder <tt>sbuf</tt>.
  If <tt>sbuf</tt> is <tt>null</tt>, a new StringBuilder will be returned. This method is
  different from appendEscapedLiteral in that it includes the quoting required for the identifier
  while {@link #escapeLiteral(StringBuilder, String, boolean)} does not.
  
  @param sbuf the string builder to append to; or <tt>null</tt>
  @param value the string value
  @return the sbuf argument; or a new string builder for sbuf == null
  @throws SQLException if the string contains a <tt>\0</tt> character