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Deletion in ESDS

 
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sandhyaimmadi

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Joined: 18 Aug 2008
Posts: 50
Location: Bangalore

PostPosted: Mon Dec 06, 2010 4:55 pm    Post subject: Deletion in ESDS
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Hi,

Why deletion of records is not possible in an ESDS file.
I know we can logically delete a record in ESDS but not physically.

But, I would like to know the exact reason.

Thanks,
Sandhya.
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Robert Sample

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Joined: 06 Jun 2008
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Location: East Dubuque, Illinois, USA

PostPosted: Mon Dec 06, 2010 5:00 pm    Post subject:
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What does it mean to physically delete a record from a file?
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sandhyaimmadi

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PostPosted: Mon Dec 06, 2010 5:13 pm    Post subject: Reply to: Deletion in ESDS
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I mean deleting a record using DELETE FILENAME RECORD like how we performing for KSDS and RRDS
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expat

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Joined: 14 Mar 2007
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Location: Back in jolly old England

PostPosted: Mon Dec 06, 2010 5:19 pm    Post subject:
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May I suggest that you go to the IBM website and look for the redbook VSAM Demystified, down load the document and read it.
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Robert Sample

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PostPosted: Mon Dec 06, 2010 5:22 pm    Post subject:
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I am asking you to actually THINK -- so consider what it means to physically delete a record from an ESDS file, as opposed to physically deleting a record from a KSDS file. How is the record accessed? If you remove that record, how do you access the following records?

The same questions apply to deleting records from ANY sequential file, not just an ESDS. A KSDS or RRDS file has different characteristics than a sequential or ESDS file, and those characteristics directly impact the answer to your question.
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Phrzby Phil

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Joined: 31 Oct 2006
Posts: 965
Location: Richmond, Virginia

PostPosted: Mon Dec 06, 2010 6:17 pm    Post subject:
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Quote:
I am asking you to actually THINK


I thought capitalized THINK was an IBM trademark.
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