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Re: Numeric 508 datatype

From: Bruce Momjian <pgman(at)candle(dot)pha(dot)pa(dot)us>
To: Simon Riggs <simon(at)2ndquadrant(dot)com>
Cc: pgsql-patches(at)postgresql(dot)org
Subject: Re: Numeric 508 datatype
Date: 2005-12-02 04:34:00
Message-ID: 200512020434.jB24Y0121472@candle.pha.pa.us (view raw or flat)
Thread:
Lists: pgsql-generalpgsql-hackerspgsql-patches
Where are we on this patch?  It is ready for the patch queue?

---------------------------------------------------------------------------

Simon Riggs wrote:
> 
> Now we're into 8.2devel mode, its time to submit the previously
> discussed patch that:
> 
> - reduces Numeric storage format by 2 bytes
> - limits scale to +/- 508 decimal places
> 
> This is sufficient to allow Numeric to continue to be used as the
> default numeric representation for all numbers in the parser.
> 
> Passes: make check on cvstip, as well as some tests not in there.
> 
> Code comments explain the new format and consequences.
> 
> As previously agreed, reviewing this is a 2 stage process:
> 1. review/possibly agree OK to commit
> 2. check with everybody on GENERAL that the restriction to 508 is
> acceptable
> 
> Figure there's no point doing (2) until we agree the proposal/code is
> workable.
> 
> As Atsushi-san point out, there is also come CPU optimization to be done
> on Numeric comparison, and also on other areas such as aggregation. I've
> not done this yet.
> 
> Best Regards, Simon Riggs

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-- 
  Bruce Momjian                        |  http://candle.pha.pa.us
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