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Regarding concatenation key in IMSDB

 
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karthik3883

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Joined: 19 Oct 2007
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Location: chennai

PostPosted: Mon Jan 28, 2008 10:12 am    Post subject: Regarding concatenation key in IMSDB
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Suppose am issuing a call with Concatenating key for 3 segments ,if the call retrieved 2 segments and the programs abends in retrieving the 3rd segment ,what will be my output will it contain the first 2 segments or nulll


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Karthik
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Bitneuker

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Joined: 07 Nov 2005
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Location: The Netherlands at Hole 19

PostPosted: Mon Jan 28, 2008 11:51 pm    Post subject:
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When a program abends you've got nothing but a dump. Please explain a bit more like showing us your DB-call. Concatenation is unknown to me in IMS but you might refer to the pathcall issued with command code *D.
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Sandy Zimmer

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PostPosted: Tue Jan 29, 2008 1:55 am    Post subject:
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George - quite possibly he is referring to the key feedback area in the PCB for that database?
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karthik3883

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PostPosted: Tue Jan 29, 2008 9:42 am    Post subject: Reply to: Regarding concatenation key in IMSDB
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hi sandy


what u have told is correct am asking about the key feed back area


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Karthik
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Sandy Zimmer

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PostPosted: Tue Jan 29, 2008 5:53 pm    Post subject:
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karthik3883 - The PCB for your database contains the concatenated keys of all successfully retrieved segments from the root on down. It also contains the last segment level number that was successfully retrieved. For instance, if you only retrieved the root, it would contain segment level 1 and the key for that root. If you successfully retrieved the child of that root, the segment level indicator would be 2 and the key feedback area would contain both the key of the root and the key of that child. Most importantly, it contains the status code of your last call. Do not ever manipulate the PCB - it belongs to IMS.
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Bitneuker

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PostPosted: Wed Jan 30, 2008 12:55 am    Post subject:
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@wikipedia: "Concatenating key = key feed back area" icon_wink.gif

Sandy, you are a sensetive woman; I think like a man so missed this one icon_lol.gif
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Sandy Zimmer

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PostPosted: Wed Jan 30, 2008 1:53 am    Post subject:
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Hey George! icon_biggrin.gif icon_redface.gif A great number of even experienced programmers do not understand the wealth of information contained in the PCB area. The second anyone mentions concatenation, I think PCB. Sometimes, it is difficult to ascertain what needs to be answered or the help someone needs - you do a great job - even for a man! icon_wink.gif
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Bitneuker

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PostPosted: Wed Jan 30, 2008 4:59 am    Post subject:
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