RVCASK01: Question on subroutine

[Former Member]

Hi ,

I have a question about a subroutine in standard print program RVCASK01.

What does the following subroutines do ?

PERFORM CONTACT_ENQUEUE USING VBKA-VBELN.

PERFORM CONTACT_DEQUEUE USING VBKA-VBELN.

Basically, what is enqueue or dequeue of a sales document ?

Your help is appreciated.

Thank you,

Surya.

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[former_member624107 · Accepted solution]

PERFORM CONTACT_ENQUEUE USING VBKA-VBELN.

is used to request lock object EVVBKAE

primary table for lock object EVVBKAE is table VBKA.

PERFORM CONTACT_DEQUEUE USING VBKA-VBELN.

Release lock on object EVVBKAE

[Former Member · Accepted solution]

Hi Sheeba,

Thanks for your quick response. What is the use of this lock and Unlock of table VBKA ? Please give some more light on this.

Thank you,

Surya

[former_member624107 · Accepted solution]

Hi Surya..

Lock objects are used to maintain consistency in database updates..

If u r locking a database table it means that u only can update

tha table not any one else..

so we can avoid the situations in which others are also updating the table at the same time.... which may lead to inconsistency....

its always better ro lock the table before updating the table...

[Former Member · Accepted solution]

Hi Sheeba,

In fact I am not doing any update on the database. I have used this code in print program for smartform. I copied the standard print program. Is it appropriate to use enqueue and dequeue in the print program ? All I am doing is retrieving data and giving it to smartform.

Please give your advise.

Thank you,

Surya.

[former_member624107 · Accepted solution]

Hi..

If u r not doing any database update then no use of locking tables....

[Former Member · Accepted solution]

Thank you so much. Awarded full points.

Thanks,

Surya