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Why do we code *RETRIEVAL inCOBOl IDMS Programs?

 
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rajeshkoratti
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Joined: 14 Feb 2006
Posts: 42
Topics: 22
PostPosted: Tue Jun 06, 2006 3:36 am    Post subject: Why do we code *RETRIEVAL inCOBOl IDMS Programs? Reply with quote
Hi All
it seems that almost all the COBOL IDMS programs in our shop has a "*RETRIEVAL" (commented out) at the start of the program. It is coded before the IDENTIFICATION DIVISION.
Can anyone let me know what is the significance of it?
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Rajesh
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Jaya
Beginner


Joined: 02 Sep 2005
Posts: 77
Topics: 10
Location: Cincinnati
PostPosted: Tue Jun 06, 2006 11:27 pm    Post subject: Reply with quote
Rajesh,

It is one of the Dictionary ready override precompiler options for overriding the default (shared update) ready mode of data dictionary's DDLDML area. Shared update mode readies the DDLDML area for both retrieval and update and allows other concurrently executing run units to ready the DDLDML area in shared update or shared retrieval usage mode.

Quote:
*RETRIEVAL
Readies the DDLDML area for retrieval only and allows other concurrently executing run units to open the area in shared retrieval, shared update, protected retrieval, or protected update usage modes.


Quote:
*PROTECTED-UPDATE
Readies the DDLDML area for both retrieval and update and allows other concurrently executing run units to ready the area in retrieval usage mode only. The protected update usage mode prevents concurrent update of the area by run units executing under the same central version.



The dictionary ready override statement must precede all source input statements.

Hope this helps..

Thanks,
Jaya.
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