CURSOR c_tt_receiptsp_detail_id NUMBER IS SELECT tTT_LOCKED_ID texchange_rate tAMOUNT FROM OMS_BCL_TT_LOCKED t WHERE tdo_detail_id = p_detail_id AND nvltis_allocated N = Y;解释

这个游标名为c_tt_receipts，它的参数是p_detail_id，类型为NUMBER。游标的查询语句是从OMS_BCL_TT_LOCKED表中选择TT_LOCKED_ID、exchange_rate和AMOUNT列，其中do_detail_id等于参数p_detail_id且is_allocated为'Y'（如果is_allocated为空，则默认为'N'）。游标的作用是返回满足条件的OMS_BCL_TT_LOCKED表中的记录。