/**
* Creates SQL diff of two DBSteward XML definition documents
*
* @return array output files list
*/
public static function diff_xml($old_xml_file, $new_xml_file, $upgrade_prefix)
{
$old_database = simplexml_load_file($old_xml_file);
if ($old_database === false) {
throw new Exception("failed to simplexml_load_file() " . $old_xml_file);
}
$old_database = xml_parser::sql_format_convert($old_database);
$new_database = simplexml_load_file($new_xml_file);
if ($new_database === false) {
throw new Exception("failed to simplexml_load_file() " . $new_xml_file);
}
$new_database = xml_parser::sql_format_convert($new_database);
pgsql8::diff_doc($old_xml_file, $new_xml_file, $old_database, $new_database, $upgrade_prefix);
}