COMMIT WORK AND WAIT 是在WAIT什么

 1 DO 2 TIMES.
 2   IF sy-index = 1.
 3     lv_wait = ‘X‘.
 4   ELSE.
 5     lv_wait = ‘‘.
 6   ENDIF.
 7   CALL FUNCTION ‘BAPI_PO_CREATE1‘
 8     EXPORTING
 9       poheader          = gs_head
10       poheaderx         = gs_headx
11 *     POADDRVENDOR      =
12 *     TESTRUN           =
13 *     MEMORY_UNCOMPLETE =
14 *     MEMORY_COMPLETE   =
15 *     POEXPIMPHEADER    =
16 *     POEXPIMPHEADERX   =
17 *     VERSIONS          =
18 *     NO_MESSAGING      =
19 *     NO_MESSAGE_REQ    =
20 *     NO_AUTHORITY      =
21 *     NO_PRICE_FROM_PO  =
22     IMPORTING
23       exppurchaseorder  = lv_po
24     TABLES
25       return            = gt_return
26       poitem            = gt_items
27       poitemx           = gt_itemx.
28   IF lv_po IS NOT INITIAL .
29     CALL FUNCTION ‘BAPI_TRANSACTION_COMMIT‘
30      EXPORTING
31        wait          = lv_wait "‘X‘
32 *     IMPORTING
33 *       RETURN        =
34               .
35     SELECT SINGLE * INTO wa
36         FROM ekko
37         WHERE ebeln = lv_po.
38     IF sy-subrc EQ 0.
39       WRITE: ‘Oh Yes, the PO has been inserted into database now‘, /.
40     ELSE.
41       WRITE: ‘Come on, The update process is running still‘, /.
42     ENDIF.
43   ENDIF.
44   CLEAR wa.
45   CLEAR lv_po.
46 ENDDO.