Hi Markus,
AFAIK the SQL standard says for querying columns to be NULL
resp. NOT NULL
select count(*) from produkte where artnummer is NULL or
artnummer is NOT NULL ;
Please try and let me know about your results.
Regards, Christoph
>
> Good day,
>
> feline=> select version();
> version
> ---------------------------------------------------------------
> PostgreSQL 7.0.2 on i686-pc-linux-gnu, compiled by gcc 2.95.2
> (1 row)
>
> feline=> select count(*) from produkte;
> count
> -------
> 36405
> (1 row)
>
> feline=> select count(*) from produkte where artnummer != NULL or
> artnummer = NULL;
> count
> -------
> 36347
> (1 row)
>
> cenes_test=> select version();
> version
> -------------------------------------------------------------
> PostgreSQL 7.1.3 on i686-pc-linux-gnu, compiled by GCC 2.96
> (1 row)
>
> cenes_test=> select count(*) from produkte;
> count
> -------
> 36384
> (1 row)
>
> cenes_test=> select count(*) from produkte where artnummer = NULL or
> artnummer != NULL;
> count
> -------
> 36326
> (1 row)
>
> 2nd query 58 less than first.
>
> bug?
>
> Markus Bertheau
>
>
>
>
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