From: | Bruce Momjian <pgman(at)candle(dot)pha(dot)pa(dot)us> |
---|---|
To: | Alex Pilosov <alex(at)pilosoft(dot)com> |
Cc: | pgsql-hackers(at)postgresql(dot)org |
Subject: | Re: [PATCH] indexability of << operator for inet/cidr |
Date: | 2001-06-14 23:05:10 |
Message-ID: | 200106142305.f5EN5An01616@candle.pha.pa.us |
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Lists: | pgsql-hackers |
Your patch has been added to the PostgreSQL unapplied patches list at:
http://candle.pha.pa.us/cgi-bin/pgpatches
I will try to apply it within the next 48 hours.
> Attached is a patch that explains to optimizer that its possible to use
> index when performing a << b where a is an inet/cidr value and b is a
> constant.
>
> Indexpath generated for such an expression is this:
> (a > network(b)) and (a <= set_masklen(broadcast(b, 32)))
>
> Since this is my first time delving in the guts of postgres, someone
> definitely should review it :)
>
> I mostly based my code on prefix_quals function for string types.
>
> Thanks
>
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--
Bruce Momjian | http://candle.pha.pa.us
pgman(at)candle(dot)pha(dot)pa(dot)us | (610) 853-3000
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