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Read one record from a VSAM file using its Primary Key

 
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Sonal Jadhao

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Joined: 03 Apr 2008
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Location: Chennai

PostPosted: Fri Apr 04, 2008 9:07 am    Post subject: Read one record from a VSAM file using its Primary Key
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I want to read one record from a VSAM file using its Primary Key. Can I do that? If yes , how do we do?
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Devzee

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PostPosted: Fri Apr 04, 2008 10:20 am    Post subject:
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What programming language you intend to use for reading the VSAM file?
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venkata.ravi

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PostPosted: Fri Apr 04, 2008 10:34 am    Post subject:
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icon_razz.gif You will get only one record if u use primary key, not multiple records
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Sonal Jadhao

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PostPosted: Fri Apr 04, 2008 3:09 pm    Post subject: Reply to: Read one record from a VSAM file using its Primary
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Using COBOL I want to Read VSAM
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expat

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PostPosted: Fri Apr 04, 2008 3:24 pm    Post subject:
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Yes, and ? What is stopping you ?

Are you asking for code ?

Are there no examples in any manuals ?
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venkata.ravi

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PostPosted: Fri Apr 04, 2008 6:11 pm    Post subject: Read one record from a VSAM file
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Here goes:

Reading from a VSAM file:Cluster must be opened for INPUT or I-O

1)Random Read with KSDS cluster:

MOVE value TO key1.
READ file-name RECORD [INTO ws-field]
INVALID KEY do something
NOT INVALID KEY do something else
END-READ


2)Random Read with RRDS cluster:

MOVE value TO key2.
READ file-name RECORD [INTO ws-field]
INVALID KEY do something
NOT INVALID KEY do something else
END-READ

Other than above you can use START command:

Repositions the file pointer at a record other than the next logical record.
File must be opened for INPUT or I-O

START file-name
KEY IS comparison key
INVALID KEY do something
NOT INVALID KEY do something else
END-START.
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Sonal Jadhao

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PostPosted: Sun Apr 06, 2008 12:54 am    Post subject: Reply to: Read one record from a VSAM file using its Primary
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Thanks Venkat.
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