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How do I determine the number of records in the cursor I've just opened?
GET DIAGNOSTICS :x = ROW_COUNT returns the number of rows processed--not
what I need here. GET DIAGNOSTICS :x = DB2_NUMBER_ROWS seems to be the
right call but it gives me a nonsense (I think) number (14932) when there
are zero rows. If I have zero rows available, I close the cursor, sleep,
wake up, open the cursor again, and check for available rows.
The goal is to put this application (a daemon) to sleep when there are no
records to process. Yes, I could go old skool and do an EOF-DELAY (but
application logic precludes arrival sequence) , data queue is the same
reason, or a file status data structure (the pre-SQL way). A
workaround isn't hard--I'd just count the number of records processed when
SQLSTT = '02000'; if the number is zero, then there are no rows available
and I'll take a nap. As I think about it, ROW_COUNT would be the
perfect solution--it's intuitive.
Sidebar question: what's the format for using VALUES and GET DIAGNOSTICS in
Run SQL Scripts?
Thanks!
-rf
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