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edkir98 · Posted: Thu Jul 03, 2008 9:28 am Post subject: Update IAM Files

I have two IAM files File1 and File2. File 2 is the continuation of File1. Since the files were too large, we split them into 2 files.
My program needs to update some records in the files. Is it possible to give the two IAM files in a Single DD and do a random select on a particular record by giving the key and then update that record?
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Thanks

Terry_Heinze · Posted: Thu Jul 03, 2008 3:08 pm Post subject:

If I remember correctly, IAM (or VSAM) files cannot be concatenated in a DD like QSAM files can be. My approach would be to initially read the 1st record in the 2nd file. If it's greater than the key I'm looking for, go after file 1; otherwise, use file 2. I'm sure someone can come up with a better idea, but this is the approach I once used for an internal table that was too large and had to be split into 2 01 level tables to circumvent the COBOL table size limit.
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....Terry