Method parse_xml

sql/item_xmlfunc.cc:2738–2776

Parse raw XML SYNOPSYS RETURN Currently pointer to parsed XML on success 0 on parse error */

    0 on parse error
*/
String *Item_xml_str_func::parse_xml(String *raw_xml, String *parsed_xml_buf)
{
  MY_XML_PARSER p;
  MY_XML_USER_DATA user_data;
  int rc;

  parsed_xml_buf->length(0);

  /* Prepare XML parser */
  my_xml_parser_create(&p);
  p.flags= MY_XML_FLAG_RELATIVE_NAMES | MY_XML_FLAG_SKIP_TEXT_NORMALIZATION;
  user_data.level= 0;
  user_data.pxml= parsed_xml_buf;
  user_data.parent= 0;
  my_xml_set_enter_handler(&p, xml_enter);
  my_xml_set_value_handler(&p, xml_value);
  my_xml_set_leave_handler(&p, xml_leave);
  my_xml_set_user_data(&p, (void*) &user_data);

  /* Add root node */
  p.current_node_type= MY_XML_NODE_TAG;
  xml_enter(&p, raw_xml->ptr(), 0);

  /* Execute XML parser */
  if ((rc= my_xml_parse(&p, raw_xml->ptr(), raw_xml->length())) != MY_XML_OK)
  {
    char buf[128];
    my_snprintf(buf, sizeof(buf)-1, "parse error at line %d pos %lu: %s",
                my_xml_error_lineno(&p) + 1,
                (ulong) my_xml_error_pos(&p) + 1,
                my_xml_error_string(&p));
    push_warning_printf(current_thd, Sql_condition::WARN_LEVEL_WARN,
                        ER_WRONG_VALUE,
                        ER(ER_WRONG_VALUE), "XML", buf);
  }
  my_xml_parser_free(&p);

  return rc == MY_XML_OK ? parsed_xml_buf : 0;
}


String *Item_func_xml_extractvalue::val_str(String *str)