Re: Boolean to int

Le jeu 04/07/2002 à 23:32, Arjen van der Meijden a écrit :
> How about this hint in the postgresql-manual:
>
> "Tip: Values of the boolean type cannot be cast directly to other
> types (e.g., CAST (boolval AS integer) does not work). This can be
> accomplished using the CASE expression: CASE WHEN boolval THEN 'value if
> true' ELSE 'value if false' END. See also Section 4.12. "
>
> For more information:
> http://www.postgresql.org/idocs/index.php?datatype-boolean.html
> and
> http://www.postgresql.org/idocs/index.php?functions-conditional.html

I tried that :

CREATE RULE boolean_return AS ON SELECT TO DOCUMENT DO INSTEAD
SELECT
document_id,
workflow_id,
type_document_id,
image_id,
theme_id,
document_version,
document_surtitre,
document_titre,
document_chapeau,
document_synthese,
document_corps,
document_pdf,
document_date_creation,
document_mot_clef,
document_online,
document_valid,
CASE document_online WHEN TRUE THEN 1
WHEN FALSE THEN 0
END,
CASE document_valid WHEN TRUE THEN 1
WHEN FALSE THEN 0
END
FROM document;

And, that doesn't work either...

psql:cnambo_proc_stock.sql:76: ERROR: select rule's target list has too
many entries

>
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