Re: [GENERAL] rewriting values with before trigger

It's a lot of work to write the functions, but it is the best way to keep the db intact.

Josh Berkus wrote:
> Robert,
>
>
>>You misunderstood. I don't think it's a bug in postgresql,  it's a bug in
>
> the
>
>>application that is hitting against my database. When it doesn't have a
>
> value
>
>>for the timestamp field, it either needs to drop it from the insert statment
>>or convert it to null; not send a ''
>
>
> Incidentally, this sort of problem is why most of my apps are based on "push"
> data functions.    i.e., instead of the client calling:
> INSERT INTO foo VALUES ( id, bar1, bar2, bar3 );
> it calls
> SELECT df_modify_foo ( id, bar1, bar2, bar3 );
>
> Data-push functions allow me to do a whole array of validation and custom
> error message return that would be impractical with triggers.   It also
> allows me to build security checks in to the back-end, via:
>
> SELECT df_modify_foo ( user_id, session_key, id, bar1, bar2, bar3 )
>
> ... allowing me to check all of the following things:
> Does the user have a valid session?
> Does the user have rights to foo?
> Does the user have a lock on foo?
> Is this a new foo record, or a modified one?
> etc.
>