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Nithyama
Beginner
Joined: 28 Dec 2006
Posts: 3
Topics: 3
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 Posted: Sat Apr 28, 2007 1:37 am Post subject: Reading VSAM file |
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How to read the VSAM sequential file from the beginning of the record?
I have read upto 5 th record. but i need to read the file again from the first record. could anyone pls help me? |
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Dibakar
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Joined: 02 Dec 2002
Posts: 700
Topics: 63
Location: USA
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| Posted: Tue May 01, 2007 1:33 am Post subject: |
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| I think closing and opening the file again should do it. |
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expat
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Joined: 01 Mar 2007
Posts: 475
Topics: 9
Location: Welsh Wales
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| Posted: Wed May 02, 2007 2:25 am Post subject: |
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| Quote: | | How to read the VSAM sequential file from the beginning of the record? |
I would guess from your description of the file above, that it is an ESDS rather than a KSDS. If this is the case then you have to close and reopen the file as said above.
If there are unique keys for the file, then perhaps this can be achieved using RANDOM access, or even overlaying the ESDS with an AIX.
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blitz2
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Joined: 23 Jan 2007
Posts: 84
Topics: 14
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| Posted: Wed May 02, 2007 7:31 am Post subject: |
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I think you should consider using tables, if you do not wish to lose the file pointer on the 5th record
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Last edited by blitz2 on Thu Mar 10, 2011 5:29 pm; edited 1 time in total |
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Nic Clouston
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Joined: 01 Feb 2007
Posts: 1075
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| Posted: Wed May 02, 2007 8:00 am Post subject: |
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beats me why you should do this but - if it always the 5th record then why not just store the first (or first four) record(s) in working storage so that it/they is/are there ready and waiting? But what happens when you read the 5th record the second time around? Repeat the process? Big loop!
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jajularamesh
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Joined: 14 Apr 2006
Posts: 87
Topics: 33
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| Posted: Wed May 30, 2007 5:38 am Post subject: |
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Can you move Low values to the key and make it point to the first record.I am not sure about this
I haerd it from one of my collegue's
Please let me know if this can be done or not |
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