Updating 3-table dataset - Mailing list pgsql-general

From Moreno Andreo
Subject Updating 3-table dataset
Date
Msg-id 70caca24-0f9e-e9e6-56d0-2be96e6d9be8@evolu-s.it
Whole thread Raw
Responses Re: Updating 3-table dataset  (Luca Ferrari <fluca1978@gmail.com>)
List pgsql-general
Hi all,
     I don't know if that's the heat burning my brain but I can't find a 
solution to what seemed a simple operation to me.

I have 3 tables
create table t_all
{
id uuid,
ref_id uuid     (FK to t_ana.id)
};
create table t_ana
{
id uuid,
code text
};
create table t_app
{
id uuid,
code text    (subset of t_ana.code)
}
I need to update t_all set t_all.id = t_app.id having t_ana.code in 
t_app.code (I wrote it in some kind of meta-sql but I hope it's clear)
I tried to create a view but I need an INSTEAD OF trigger, since it 
spreads among 3 tables so I hope there's some faster path to achieve the 
solution....

Thanks
Moreno






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