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Focal Point    Focal Point Forums  Hop To Forum Categories  iWay Software Product Forum on Focal Point    Accessing MVS ISAM file with multiple record types

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Accessing MVS ISAM file with multiple record types
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<Mark Smith>
posted
I'm trying to create a webfocus reporting object for a file that contains multiple record type/formats.

For example:
Record1 - 01xxxxrrrrrrrrryyyyyyyyyyyyyyyyy
record2 - 02yyyyyyyxxxxrrrrrrr
record3 - 01xxxxrrrrrrrrryyyyyyyyyyyyyyyyy

In the above example the first two characters are the identifier of the record type, the x, r, y is data. For each record type, the data will be in the same format.

Is there a way to access this kind of file using one master file description?

Also, how would the master and access files be defined to read this kind of ISAM file?
 
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<monte2000>
posted
Hi there, Mark.

I spoke to the Product Manager and he said:

We haven't seen anybody using ISAM files, now every file is a VSAM file. Try the following:
Have a DUMMY root segment,
SEGNAME=DUMMY
FIELD =, A1,A1,$
SEGNAME=R1,PARENT=DUMMY,$
FIELD =RECTYPE,01,A2,A2,$
SEGNAME=R2,PARENT=DUMMY,$
FIELD= RECTYPE,02,A2,A2,$
SEG............
FIELD..........

There are good VSAM people in our Tech Support group, they might even have samples.

Hope this helps,

Monica
 
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Chris Boylan
Gold member
posted Hide Post
quote:
Originally posted by monte2000:
[qb]We haven't seen anybody using ISAM files, now every file is a VSAM file.[/qb]
ISAM files are not supported by IBM any longer, but some people do still use them. SUFFIX=ISAM in a MFD should still work (it invokes an earlier version of the FOCSAM interface that supports ISAM files).

The syntax for SUFFIX=ISAM is similar to SUFFIX=VSAM though you don't get the latest and greatest features of the VSAM interface. The code example above of unrelated RECTYPEs with a DUMMY parent segment should work just fine for either ISAM or VSAM files.

ISAM and VSAM files do not require an access file, just a master file description.

Hope that helps.

-Chris
 
Posts: 55 | Location: New York | Registered: March 07, 2003Report This Post
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