<?php
$table = new PhabricatorUser();
$conn = $table->establishConnection('w');
$table_name = 'user_ldapinfo';
foreach (new LiskRawMigrationIterator($conn, $table_name) as $row) {
throw new Exception(
pht(
'This database has ancient LDAP account data and is too old to upgrade '.
'directly to a modern version of the software. Upgrade to a version '.
'released between June 2013 and February 2019 first, then upgrade to a '.
'modern version.'));
}