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Re: Optimization rules for semi and anti joins - Mailing list pgsql-hackers

From Jonah H. Harris
Subject Re: Optimization rules for semi and anti joins
Date
Msg-id 36e682920902101806m14eaa27cr9bd721716194b84c@mail.gmail.com
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In response to Re: Optimization rules for semi and anti joins  (Tom Lane <tgl@sss.pgh.pa.us>)
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On Tue, Feb 10, 2009 at 8:41 PM, Tom Lane <tgl@sss.pgh.pa.us> wrote:
"Jonah H. Harris" <jonah.harris@gmail.com> writes:
> Cripes!  I just had an idea and it looks like the buggers beat me to it :(
> http://www.google.com/patents?id=4bqBAAAAEBAJ&dq=null+aware+anti-join

I wonder if the USPTO is really clueless enough to accept this?
Claim 1 would give Oracle ownership of the definition of NOT IN,
and few of the other claims seem exactly non-obvious either.

Yeah, I just looked up semi and anti-join optimization patents and Oracle/IBM have a ton.  What an obvious exploitation of math for business gain.  I doubt they'd be enforceable.  I wish they'd just do away with software patents altogether :(

--
Jonah H. Harris, Senior DBA
myYearbook.com

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