Improve your ABAP Code Performance.

Former Member — Tue, 31 May 2005 06:11:49 GMT

SAP Note : 185530

Long Text

Symptom

Customer-specific programs and program enhancements ("User Exits") have

a bad performance. The bad performance is noticed during accesses to the

following SAP SD tables: VBAK, VBAP, VMVA, LIKP, LIPS, VBRK, VBRP, VBFA

Additional key words

Cause and prerequisites

The R/3 System contains no secondary indexes to the most important SD

transaction data tables in the delivery. Instead, the R/3 System has

proprietary index tables (sales document indexes, for example the tables

VAKPA and VAPMA, matchcode tables for example M_VMVAB, M_VMVAC or

matchcode views for example M_VMVAA, M_VMVAE), which allow an efficient

access.

In order to use these efficiently a certain basic knowledge of the SAP

data model is required. For this this note lists the most important

errors which are made and it offers alternatives.

However note the following WARNINGS:

o Before you use the listed alternatives productively, you must

check your program closely for functional accuracy.

o The sales document indexes must be maintained correctly in your

system. This is usually automatically the case, however, there can

be inconsistencies. Carefully read and follow Notes 128947 and

178328.

Consider the following NOTES:

In the following examples, there are often accesses to several tables,

for example:

SELECT FROM vakpa WHERE kunde = ...

SELECT FROM vbak WHERE vbeln = vakpa-vbeln.

It can increase the performance, to define a selection view on the

corresponding tables (here: VAKPA and VBAK) in order to combine the

accesses to the two tables in one access.

Solution

1. Accesses to sales orders (tables VBAK, VBAP)

Page 2

a) Search orders for customer number (field VBAK-KUNNR):

Incorrect:

SELECT FROM vbak WHERE kunnr = ...

Correct:

SELECT FROM vakpa WHERE kunde = ...

SELECT FROM vbak WHERE vbeln = vakpa-vbeln.

b) Search order items for material number (field VBAP-MATNR):

Incorrect:

SELECT FROM vbap WHERE matnr = ...

Correct:

SELECT FROM vapma WHERE matnr = ...

SELECT FROM vbap WHERE vbeln = vapma-vbeln

AND posnr = vapma-posnr

c) Other search helps for sales orders offer the matchcode tables and

views M_VMVAx, x. = A, B, C, ... M; for example search for

purchase order number of the customer, description and so on

2. Accesses to deliveries (tables LIKP, LIPS)

a) Search for deliveries with customer number (field LIKP-KUNNR):

Incorrect:

SELECT FROM likp WHERE kunnr = ...

Correct:

SELECT FROM vlkpa WHERE kunde = ...

SELECT FROM likp WHERE vbeln = vlkpa-vbeln.

b) Search for delivery items with material number (field LIKP-MATNR):

Incorrect:

SELECT FROM lips WHERE matnr = ...

Correct:

SELECT FROM vlpma WHERE matnr = ...

SELECT FROM lips WHERE vbeln = vlpma-vbeln

AND posnr = vlpma-posnr

c) Search for deliveries with sales order number (preceding document,

field LIPS-VGBEL):

Incorrect:

SELECT FROM lips WHERE vgbel = ...

Correct:

SELECT FROM vbfa WHERE VBELV = ... and VBTYP_N = 'J'

SELECT FROM lips WHERE vbeln = vbfa-vbeln

AND posnr = vbfa-posnn

d) Other search helps for deliveries offer matchcode tables and views

M_VMVLx, x. = A, B, C, ... M; for example search for goods issue

date, picking date, transportation planning date and so on.

3. Accesses to invoices (tables VBRK, VBRP)

a) Search for invoices with customer number ("payer") (field

Page 3

VBRK-KUNRG):

Incorrect:

SELECT FROM vbrk WHERE kunrg = ...

Correct:

SELECT FROM vrkpa WHERE kunde = ...

SELECT FROM vbrk WHERE vbeln = vrkpa-vbeln

b) Search for invoice items with material number (field VBRP-MATNR):

Incorrect:

SELECT FROM vbrp WHERE matnr = ...

Correct:

SELECT FROM vrpma WHERE matnr = ...

SELECT FROM vbrp WHERE vbeln = vrpma-vbeln

AND posnr = vrpma-posnr

c) Search for invoices with delivery number (preceding document,

field VBRP-VGBEL):

Incorrect:

SELECT FROM vbrp WHERE vgbel = ...

Correct:

SELECT FROM vbfa WHERE vbtyp_n = 'M'

AND vbelv = ...

SELECT FROM vbrp WHERE vbeln = vbfa-vbeln

AND posnr = vbfa-posnn

d) Search for invoices with order number (preceding document, field

VBRP-AUBEL):

Incorrect:

SELECT FROM vbrp WHERE aubel = ...

Correct:

SELECT FROM vbfa WHERE vbtyp_n = 'M'

AND vbelv = ...

SELECT FROM vbrp WHERE vbeln = vbfa-vbeln

AND posnr = vbfa-posnn

4. Other accesses in SD:

a) Document flow:

Incorrect:

SELECT vbelv FROM vbfa WHERE vbeln ...

In table VBFA only the preceeding document is used to search for

the subsequent document (for example, delivery for order).

Searching the other way makes no sense with this table since the

preceding documents (for example, order for delivery) are stored

directly in the document tables. Thus reading in table VBFA is a

one-way street.

Correct:

SELECT vgbel FROM lips WHERE vbeln = ...; or

SELECT vgbel FROM vbrp WHERE vbeln = ...; or

SELECT aubel FROM vbrp WHERE vbeln = ...

b) Search for shipping unit item with delivery

Incorrect:

Page 4

SELECT FROM vepo WHERE vbtyp = 'J'

AND vbeln = i_lips-vbeln

Correct:

SELECT FROM vbfa WHERE vbtyp_n = 'X'

AND vbelv = i_lips-vbeln

SELECT FROM vepo WHERE venum = vbfa-vbeln

Re: Improve your ABAP Code Performance.

ssimsekler — Tue, 31 May 2005 08:21:34 GMT

Hi Rajesh

Thank you for sharing this note. It would be really useful for SD ABAPers.

Regards

*--Serdar <a href="https://www.sdn.sap.com:443http://www.sdn.sap.comhttp://www.sdn.sap.com/irj/servlet/prt/portal/prtroot/com.sap.sdn.businesscard.sdnbusinesscard?u=qbk%2bsag%2bjiw%3d">[ BC ]</a>

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