On Thu, 2 Jul 2015 09:31:37 -0500, Paul Gilmartin <[email protected]> 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

Scott Fagen
Chief Architect - Mainframe
CA Technologies

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