Can you PLEASE explain why there was/is support for a SHR->EXC
>Upgrade...
Pretty simple. The dataset is ENQed SHR because the highest DISP in the
job for that dataset is SHR. But some function in a step may want to
get EXC control so that it can update the dataset, thus the RET=CHNG
function. For example if you issue a DYNALLOC for the dataset in a
program with DISP=OLD I believe DYNALLOC will chnage the ENQ.
As far as a EXC-SHR function, this also seems obvious to me. The
initiator ENQs the dataset, and then releases the dataset at the end of
the last step that uses it. If you issue a EXC-SHR request, a fullowing
step may need the dataset exclusive and you have now compromised the
dataset. There is no easy way that I know to determine if the current
step is the last step that uses the dataset.
--
Bruce A. Black
Senior Software Developer for FDR
Innovation Data Processing 973-890-7300
personal: [EMAIL PROTECTED]
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web: www.innovationdp.fdr.com
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