Selecting many records for each material...

Question

Hi all,
I have an internal table that contains a list of materials. I want to loop over that list and retrieve a group of purchase reqs from EBAN for each material...appending each group of rews to my req table for each pass over the material list. Sample code;
LOOP AT GT_MATERIALS INTO WA_MATERIALS.
SELECT MENGE LFDAT
    INTO CORRESPONDING FIELDS OF TABLE GT_EBAN_FIELDS
    FROM EBAN
    WHERE MATNR EQ WA_MATERIALS-MATNR.      
    ???DO I DO AN APPEND OF SOME KIND HERE???
ENDLOOP.
Regards,
Mat

Answer 1

Hi Mathew,
From performance point of view, the SELECT QUERY should not be under a loop. So you can do the following :
<b>SORT GT_MATERIALS.
IF not gt_materials is initial.</b>
SELECT MENGE LFDAT
INTO CORRESPONDING FIELDS OF TABLE GT_EBAN_FIELDS
FROM EBAN
<b>FOR ALL ENTRIES IN GT_MATERIALS</b>
WHERE MATNR EQ GT_MATERIALS-MATNR.
<b>ENDIF.</b>
Also if the structure of table GT_EBAN_FIELDS has only two fields MENGE, LFDAT then please remove INTO CORRESPONDING FIELDS, instead use INTO TABLE GT_EBAN_FIELDS. This is becz INTO CORRESPONDING FIELDS would affect the performance.
Best regards,
Prashant