如何使用 WHERE 条件中的关联值从 ABAP SQL 使用 CDS? [英] How to consume a CDS from ABAP SQL using an association value in the WHERE condition?

问题描述

我有一个通知标题的 CDS 视图，并与其状态关联

I have a CDS view for notifications header with an association to their status

define view ZNOTIF as select from qmel as notif
    association [0..*] to ZNOTIF_STATUS as _status on _status.object_num = notif.objnr
{
    key notif.qmnum        as notif_id,
    notif.objnr            as object_num,
    notif.qmart            as type,
    notif.qmtxt            as description, 
    _status
}

现在我想在 ABAP 中使用这个 CDS，选择具有特定状态的所有通知(如果可能，不增加基数).

Now I would like to consume this CDS in ABAP selecting all the notifications with an specific status (and without incrementing cardinality if possible).

类似的东西，但当然这有一个语法错误:

Something like this, but of course this has a syntax error:

SELECT notif_id,
       type,
       description
  FROM ZNOTIF
  INTO TABLE @DATA(notifs)
  WHERE \_status-status_id = 'STATUS_FILTER_VALUE'. "Syntax error

我能以某种方式这样做吗?

Can I do that somehow?

推荐答案

SELECT DISTINCT notif_id,
   type,
   description
FROM ZNOTIF
WHERE \_status[ (*) ]-status_id = 'STATUS_FILTER_VALUE'
INTO TABLE @DATA(notifs).

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