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Re: Checksum/Hash Functions

From: "Joshua b(dot) Jore" <josh(at)greentechnologist(dot)org>
To: Bryan White <bryan(at)arcamax(dot)com>
Cc: pgsql-general <pgsql-general(at)postgreSQL(dot)org>
Subject: Re: Checksum/Hash Functions
Date: 2002-05-30 14:14:49
Message-ID: Pine.BSO.4.44.0205300914180.8388-100000@kitten.greentechnologist.org (view raw or flat)
Thread:
Lists: pgsql-general
Look in contrib/crypto (I think it was crypto). There are some hash
functions and other crpto stuffs in there.

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On Thu, 30 May 2002, Bryan White wrote:

> 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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