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Re: Performance: BigInt vs Decimal(19,0)

From: "Yusuf W(dot)" <unicef2k(at)yahoo(dot)com>
To: pgsql-performance(at)postgresql(dot)org
Subject: Re: Performance: BigInt vs Decimal(19,0)
Date: 2003-09-28 02:39:36
Message-ID: 20030928023936.66818.qmail@web40408.mail.yahoo.com (view raw or flat)
Thread:
Lists: pgsql-performance
Now, I've got to convince my project's software
architech, that a bigint would be better than a
decimal.  

Does anyone know where I could get some documentation
on how the int and decimal are implemented so I could
prove to him that ints are better?  Can people suggest
good points to make in order to prove it?     

Thanks in advance.

--- Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> wrote:
> "Yusuf W." <unicef2k(at)yahoo(dot)com> writes:
> > For the application that I'm working on, we want
> to
> > use data types that are database independent. 
> (most
> > databases has decimal, but not big int).
> 
> Most databases have bigint, I think.
> 
> > Anyhow, we are planning on using decimal(19,0) for
> our
> > primary keys instead of a big int, would there be
> a
> > performance difference in using a bigint over
> using decimals?
> 
> You'll be taking a very large performance hit, for
> very little benefit
> that I can see.  How hard could it be to change the
> column declarations
> if you ever move to a database without bigint? 
> There's not normally
> much need for apps to be explicitly aware of the
> column type names.
> 
> 			regards, tom lane


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Next:From: Josh BerkusDate: 2003-09-28 03:06:42
Subject: Re: Performance: BigInt vs Decimal(19,0)
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