Horton

Re: SSI bug?

Heikki Linnakangas <heikki.linnakangas@enterprisedb.com>

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From: Heikki Linnakangas <heikki.linnakangas@enterprisedb.com>
To: Kevin.Grittner@wicourts.gov
Cc: YAMAMOTO Takashi <yamt@mwd.biglobe.ne.jp>, pgsql-hackers@postgresql.org
Date: 2011-02-14T10:40:37Z
Lists: pgsql-hackers 
Looking at the prior/next version chaining, aside from the looping 
issue, isn't it broken by lock promotion too? There's a check in 
RemoveTargetIfNoLongerUsed() so that we don't release a lock target if 
its priorVersionOfRow is set, but what if the tuple lock is promoted to 
a page level lock first, and PredicateLockTupleRowVersionLink() is 
called only after that? Or can that not happen because of something else 
that I'm missing?

-- 
   Heikki Linnakangas
   EnterpriseDB   http://www.enterprisedb.com