Re: Checksum/Hash Functions

There are some hashes in the contrib/pg_crypto addition. You may need to
install this specifically (it's a separate RPM, or, if you install from
source, it's in the contrib/ folder).

- J.

Joel BURTON | joel(at)joelburton(dot)com | joelburton.com | aim: wjoelburton
Knowledge Management & Technology Consultant

> -----Original Message-----
> From: pgsql-general-owner(at)postgresql(dot)org
> [mailto:pgsql-general-owner(at)postgresql(dot)org]On Behalf Of Bryan White
> Sent: Thursday, May 30, 2002 9:53 AM
> To: pgsql-general
> Subject: [GENERAL] Checksum/Hash Functions
>
>
> Does PostgreSQL have any built-in check sum or hash functions.
>
> I want to be able to compute a checksum of a string as I display
> a record to
> the user and when the user updates the record compare the checksum in the
> update statement. I can do the checksum on the client side but it would
> save the overhead of an additional select statement at update time if the
> checksum could be computed on the database backend.
>
> I know I could write my own function to do this but I first
> wanted to check
> if there was a function already setup to do it. I have looked at the
> documentation but did not find anything.
>
> ---------
> Bryan White
> This email represents the consensus opinion
> of the many voices in my head.
>
>
>
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