This has been saved for the 8.3 release:
http://momjian.postgresql.org/cgi-bin/pgpatches_hold
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Abhijit Menon-Sen wrote:
> Someone (David Fetter?) mentioned long ago that contrib/userlock could
> not be moved into core because it is GPLed, and the author couldn't be
> contacted to ask about re-licensing.
>
> Andrew(@supernews) wrote a specification for the userlock functionality,
> and I implemented the attached code based on his specification, without
> consulting the existing source.
>
> It's available under a BSD license, if there's any use for it.
>
> -- ams
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>
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--
Bruce Momjian bruce@momjian.us
EnterpriseDB http://www.enterprisedb.com
+ If your life is a hard drive, Christ can be your backup. +