That's one of my favorite things about Rexx (although I hear EXECIO is
not really part of Rexx and I know it's not in PC versions like Regina).
I've used it on some very large datasets, and yeah, you wait a bit for
the data to load. But once data is in the stem variable, things are
really fast and (another favorite of mine) you can easily do control
breaks by peeking 1 record ahead or back.
On 5/15/2020 9:12 AM, Charles Mills wrote:
Right, it appears to be magic -- "just say EXECIO and presto there's the record
count in STEM.0" -- but under the covers it is reading through the whole dataset and
counting.
Rexx is all 31-bit, right? So the limit would presumably be something in the 1
to 2 GB range. That is not an implausibly huge dataset. 1GB is what? 800
cylinders or somewhat more, depending on blocking, short tracks, etc.?
Charles
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