streams/Code/Update/_1213.php

<?php

namespace Code\Update;

class _1213
{

    public function run()
    {
        if (ACTIVE_DBTYPE == DBTYPE_MYSQL) {
            q("START TRANSACTION");

            $r = q("ALTER TABLE abconfig 
				DROP INDEX chan,
				DROP INDEX xchan,
				ADD INDEX chan_xchan (chan, xchan)
			");

            if ($r) {
                q("COMMIT");
                return UPDATE_SUCCESS;
            } else {
                q("ROLLBACK");
                return UPDATE_FAILED;
            }
        }
    }
}