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Dhanya Praju
New User
Joined: 16 Jul 2008
Posts: 10
Location: Banglaore
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| Can we read ESDS file randomly in batch programs using RBA?IF so how? |
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Apeksha
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Joined: 21 May 2008
Posts: 37
Location: Mumbai
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somnath.barik
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Joined: 16 Aug 2007
Posts: 8
Location: mumbai
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| Move RBA to key field and use start verb to find the position. |
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Dhanya Praju
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Joined: 16 Jul 2008
Posts: 10
Location: Banglaore
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| There is no key field in my file. Then how to start reading the file. |
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Robert Sample
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Joined: 06 Jun 2008
Posts: 8696
Location: Dubuque, Iowa, USA
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From the Enterprise COBOL Programming Guide:
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1.10.2.4 Specifying access modes for VSAM files
You can access records in VSAM sequential files only sequentially. |
And just to clarify, ESDS means entry-sequenced dataset which means VSAM sequential.
So the answer to your question is no, you cannot read an ESDS randomly by using the RBA. |
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Dhanya Praju
New User
Joined: 16 Jul 2008
Posts: 10
Location: Banglaore
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Thanks.. my file is ESDS- Vsam sequential file.
But I would like to know
how the ESDS file is read randomly in cics using RBA by passing it to the RIDFLD keyword, since there is no rba or key field in the file ? |
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expat
Global Moderator
Joined: 14 Mar 2007
Posts: 8797
Location: Welsh Wales
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Probably using an AIX, which I believe is the only way that you can read an ESDS randomly.
But I am not a programmer  |
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Robert Sample
Global Moderator
Joined: 06 Jun 2008
Posts: 8696
Location: Dubuque, Iowa, USA
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| Your original problem statement was for BATCH. My answer was for batch. CICS uses a different way to read a file, not the COBOL method. The way CICS reads the file allows use of the RBA in the RIDFLD to directly access an ESDS record; this cannot be done in batch. |
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karthikr44
Active User
Joined: 25 Aug 2007
Posts: 235
Location: Chennai
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In one book i read that CICS process only either KSDS using key and RRDS using RBA.
Regards
R KARTHIK |
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Bill O'Boyle
CICS Moderator
Joined: 14 Jan 2008
Posts: 2501
Location: Atlanta, Georgia, USA
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For truly Random Reads all over the ESDS Base Cluster from a Batch caller, the only way that I know is via an ASSEMBLER sub-program, but I've been wrong before 
Bill |
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