$dbw = $this->getDB( DB_MASTER );
$start = $dbw->selectField( $table, "MIN($idCol)", false, __METHOD__ );
$end = $dbw->selectField( $table, "MAX($idCol)", false, __METHOD__ );
$dbw = $this->getDB( DB_MASTER );
$start = $dbw->selectField( $table, "MIN($idCol)", false, __METHOD__ );
$end = $dbw->selectField( $table, "MAX($idCol)", false, __METHOD__ );