One way is to create a logical file. Use the physical file for the
random reads and the logical file for the sequential reads (or vice
versa).
Kelly
-----Original Message-----
From: cobol400-l-bounces@xxxxxxxxxxxx
[mailto:cobol400-l-bounces@xxxxxxxxxxxx] On Behalf Of Nancy Barney
Sent: Wednesday, June 04, 2008 9:32 AM
To: cobol400-l@xxxxxxxxxxxx
Subject: [COBOL400-L] How to do sequential and random reads concurrently
I have an indexed file that I am reading sequentially using a repeating,
non-unique alternate key, using start and read next. Access is dynamic.
As I am reading through this file sequentially, I also have to randomly
retrieve records from the same file using the primary key. (For each
record that I retrieve sequentially, I have to get another record
randomly.)
I can't do a start after the random read to reset the record pointers
for the sequential read, because I am using a non-unique alternate key
to start the sequential read.
How do I do this without messing up the record pointers? When I tested
this, I don't get all the records I should get from the sequential read,
as if the random read 'resets' the record pointers.
How do I get around this? Thanks in advance for your help!
Nancy Barney
Dakota Drug, Inc
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