PK with an expression in field list

From: "Alejandro Michelin Salomon \( Adinet \)" <alejmsg(at)adinet(dot)com(dot)uy>
To: "Pgsql-General" <pgsql-general(at)postgresql(dot)org>
Subject: PK with an expression in field list
Date: 2006-05-24 14:55:12
Message-ID: !~!UENERkVCMDkAAQACAAAAAAAAAAAAAAAAABgAAAAAAAAAhx491Ki2tUS42D/aMPFg1MKAAAAQAAAAF/Z2oXHDKEuLTgKLcD9yywEAAAAA@adinet.com.uy
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Hi:

I need create a PK for a table.
This PK has 3 fields.
PK is : CONSTRAINT ff_navios PRIMARY KEY ( idempresa, idarmador, UPPER( nome
) )
But seems not work.

I have and other way to do this ?

If this fields are not null and i create a unique index in place off pk, i
have the same effect ?

Alejandro Michelin Salomon
Porto Alegre
Brasil.


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