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Move & Move-Corresponding in ABAP

原创 IT综合 作者:qmhiro 时间:2008-05-12 14:44:20 0 删除 编辑

DATA: BEGIN OF wa_tab1,
fld1(4) VALUE ’FLD1’,
fld2(4) VALUE ’FLD2’,
fld3(4) VALUE ’FLD3’,
fld4(4) VALUE ’FLD4’,
fld5(4) VALUE ’FLD5’,
END OF wa_tab1,
BEGIN OF wa_tab2,
fld1(4),
fld2(4),
fld3(4),
fld4(4),
END OF wa_tab2.

************* Move Corresponding *************
MOVE-CORRESPONDING wa_tab1 to wa_tab2.
************ End Move Corresponding

******************************Move********************
MOVE: wa_tab1-fld1 to wa_tab2-fld1,
wa_tab1-fld2 to wa_tab2-fld2,
wa_tab1-fld3 to wa_tab2-fld3,
wa_tab1-fld4 to wa_tab2-fld4.
****************** End Move ******************

In above example, the result of MOVE and MOVE-CORRESPONDING is same. MOVE-CORRESPONDING is look like easy to coding but

MOVE statement have performance better than MOVE-CORRESPONDING because when you apply MOVE-CORRESPONDING CPU usage of system

will be increased.


Question:
Among "Move" and "Move Corresponding", which is efficient one?
Answer :

move statement is more effienet than move-corresponding.
In case of dialog programming move/movecorresponding stsmt are used to put internal table workarea data into screen fields.

data: begin of itab occurs 0,
lifnr like lfa1-lifnr,
name1 like lfa1-name1,
ort01 like lfa1-ort01,
end of itab. (here lfa1 is DBtable name)
:
* in case of movecorresponding

Move-Corresponding itab to lfa1.
(here:lfa1 is screen fields name).

* in case of MOVE stmt.

Move itab-lifnr to lfa1-lifnr.
Move itab-name1 to lfa1-name1.
Move itab-ort01 to lfa1-ort01.

Movecorresponding :
If DBtable having 1000 fields and you are using movecorresponding, then system has to check all the field in table to move.

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