$where1 = array(

'uid' => array('eq', $id),

'type' => array('eq', 1),

'trade_type' => array('eq', 1),

'status' => array('in', array(2,3,4))

);

$where = array(

'_complex' => $where1, // 复合查询

'_logic' => 'or', // 关系为or

'_string' => 'b_uid='.$id.' AND type=2 AND trade_type=1 AND status in (2,3,4)',

);