Re: [HACKERS] Associative Operators? (Was: Re: [NOVICE] Out of frying pan, into fire)

From: "Ross J(dot) Reedstrom" <reedstrm(at)rice(dot)edu>
To: hackers(at)postgresql(dot)org
Subject: Re: [HACKERS] Associative Operators? (Was: Re: [NOVICE] Out of frying pan, into fire)
Date: 1999-03-16 23:58:33
Message-ID: 36EEF029.396C378B@rice.edu
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Clark Evans wrote:
>
<snipped discussion of 'something || NULL ' returning non-NULL>

> However, I'm unaware of any other exceptions in the Oracle
> database on this issue. I believe that user defined functions
> are not allowed to have special NULL treatment -- perhaps
> Oracle has DECODE and NVL hard coded deep in the guts of
> their query processor, while the other functions arn't.
>
> Would a compromise be to add DECODE and NVL ?

What do DECODE and NVL do?

Ross
--
Ross J. Reedstrom, Ph.D., <reedstrm(at)rice(dot)edu>
NSBRI Research Scientist/Programmer
Computer and Information Technology Institute
Rice University, 6100 S. Main St., Houston, TX 77005

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