OPEN DATASET FOR OUTPUT File Lock

[Gaku]

Hello,experts.

Can "OPEN DATASET FOR OUTPUT" perform file locking(Write Lock)?

I want to prevent other systems from accessing the files.

Thanks.

[former_member184158]

Hi,

To lock a file when opening it for output, you can use the addition FOR UPDATE in the OPEN DATASET statement. I think, this addition ensures that no other process can open the file for writing at the same time.

OPEN DATASET p_file FOR UPDATE IN TEXT MODE ENCODING DEFAULT.

Try it. it may help.

[raymond_giuseppi]

Are you able to use FOR OUTPUT and FOR UPDATE in the same statement?

[former_member184158]

I mean for update. Maybe it helps.

[raymond_giuseppi]

AFAIK SAP didn't handle such lock (read 27 - Recommendations for ABAP file interface - 9. Locks)

You could create a lock object in SAP to handle locks from your SAP system, but for other systems look for other solutions to manage files with some external tool..