Re: inserting via "on insert" rule

Peter Eisentraut wrote:

>Andreas Fromm writes:
>
>
>
>>I was thinking of defining a view "users" over "persons" which would let
>>me retrive the list of useres. But How would I implement the rule for
>>insertiung users? I tryed the following but NEW is not known where I
>>want to use it:
>>
>>CREATE VIEW users AS
>> SELECT * FROM persons WHERE is_user(person.id) = TRUE;
>>
>>CREATE RULE insert_on_users AS ON INSERT
>> TO users DO INSTEAD
>> INSERT INTO persons SELECT * FROM NEW;
>>
>>
>
>You can write
>
>... DO INSTEAD INSERT INTO persons VALUES (NEW.col1, NEW.col2, ...);
>
>
>
Yes, but the advantage of the select would be that I could do a SELECT
.. FROM .. WHERE , or how can I perform a checking of the data before
insertion?

Andreas