On Fri, 3 Jul 2015 11:07:31 -0500, Scott Fagen wrote:

>On Thu, 2 Jul 2015 09:31:37 -0500, Paul Gilmartin wrote:
>
>>Suppose:
>>ALLOCATE DD(DDSHR) DSN(FOO.BAR) SHR
>>    There is now an ENQ SHR SYSDSN FOO.BAR
>>
>>Then:
>>ALLOCATE DD(DDEXC) DSN(FOO.BAR) OLD
>>    The ENQ is upgraded to EXC
>>
>>... some stuff ...  Then:
>>FREE DD(DDEXC)
>>    is the ENQ downgraded back to SHR?  Why or why not?
>>
>>-- gil
>
>See 
>http://www-01.ibm.com/support/knowledgecenter/SSLTBW_2.1.0/com.ibm.zos.v2r1.e0za100/mvssysdsn.htm
>
Which says much about JCL, but nothing about dynamic allocation which
was the subject of my quetion and example.

-- gil

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