Re: Australian timezone configure option - Mailing list pgsql-patches

From Bruce Momjian
Subject Re: Australian timezone configure option
Date
Msg-id 200106121652.f5CGqMZ20608@candle.pha.pa.us
Whole thread Raw
In response to Australian timezone configure option  (Chris Dunlop <chris@onthe.net.au>)
List pgsql-patches
> Bruce Momjian <pgman@candle.pha.pa.us> writes:
> > I found I didn't need to clear the date cache.
> >>
> >> Hmm, are you sure about that?  I'm not.
>
> > I checked and it caches a pointer to the struct, not the values
> > themselves, and we don't change the structure, just the secondary values
> > and not the key used by the bsearch.
>
> Now I'm going to object LOUDLY.  You cannot convince me that the above
> is a good implementation --- it's a complete crock, and will break the
> instant someone looks at it sidewise.
>
> My inclination would actually be to rip out the cache entirely.  bsearch
> in a table this size is not so expensive that we need to bypass it, nor
> is it apparent that we are going to see lots of successive lookups for
> the same keyword anyway.  How long has that cache been in there, and
> what was the motivation for adding it to begin with?

I see the CACHE coming in with:

    1.42         (thomas   16-Feb-00): #define USE_DATE_CACHE 1

--
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