I'm doing some cross-platform development, under LUW 8.2 (Windows) for
z/OS 8.
I have some fairly complex queries which address some rather large
tables.
One query takes approximately 30 seconds to complete, once the result
set has been loaded into buffer caches. The initial run of the query
is about 2 minutes.
I created an MQT, and that sped up the performance of my query
considerably.
Although I was able to structure the fullselect to 'obey the laws' for
'REFRESH IMMEDIATE' MQTs under LUW, I appear to be out of luck under z/
OS, simply because, according to the dox I've read, z/OS does not
offer REFRESH IMMEDIATE as an option. It's im****tant that the MQT is
kept well up-to-date with its source tables.
I thought of putting a trigger on the source tables to initiate a
REFRESH TABLE command, but the list of 'allowed' statements which a
trigger can, well, trigger - does not appear to include 'REFRESH
TABLE'.
Best I can find, by scouring the group and other forums, is a solution
that involves creating a trigger that calls a stored procedure, which
initiates a REFRESH TABLE.
Has anyone else found a slightly more intuitive solution for this
problem? Am I incorrect in my conclusion that IMMEDIATE REFRESH is not
sup****ted under z/OS UDB?
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