Re: Error with DISTINCT and AS keywords - Mailing list pgsql-sql

On Wed, 10 Jul 2002, Andreas Schlegel wrote:

> Hi,
> 
> I need some help to let this sql statement run with Postgres 7.2.1
> 
> Doesn't work:
> select DISTINCT tnr, titel, 'TEST' AS testcol from tTitel;
> ERROR:  Unable to identify an ordering operator '<' for type 'unknown'
>          Use an explicit ordering operator or modify the query

Do it as

select DISTINCT tnr, titel, 'TEST'::text AS testcol from tTitel;

> 
> If I remove the DISTINCT keyword it works:
> select tnr, titel, 'TEST' AS testcol from tTitel;
> 
> 
> 
> Greetings,
> Andreas
> 
> 
> 
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Achilleus Mantzios
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