Обсуждение: Get / Set Composite Type Fields within triggers
Hi
This is my first question, so, forgive me if it's a newby issue but I couldn't find an answer googling.
I have a simple composite type
CREATE TYPE info_base AS
(by text,
at timestamp without time zone);
I want to use it as the data type of created, modified and deleted fields. I already know hot to index, update and select a sub-field like
CREATE INDEX ix_created_by ON xxx.yyy ((created).by);
UPDATE xxx.yyy SET created.by = 'user';
select * from xxx.yyy where (created).by = 'that user';
My problem is inside triggers: How can I set or get type field values for NEW or OLD? (I need it to check users permissions at row level, etc.)
I tried NEW.((created).by), NEW.(created.by), NEW.created.by and nothing works...
Could you help me please?
Thanks in advance.
Martin
> My problem is inside triggers: How can I set or get type field values for
> NEW or OLD? (I need it to check users permissions at row level, etc.)
>
> I tried NEW.((created).by), NEW.(created.by), NEW.created.by and nothing
> works...
>
> Could you help me please?
>
> Thanks in advance.
> Martin
for accessing you could use
(NEW.created).by
for setting it, as far as I know it's not possible to assign directly
to a field of a composite type in a record,
but something like this would work
# create table foo (a info_base);
# create or replace function foobartrig() returns trigger AS
$func$
declare rec info_base;
begin
rec := ('AAAAAAAAAAAAAAAAAA', (NEW.a).at);
NEW.a := rec;
raise warning '%', NEW;
RETURN NEW;
END;
$func$
language plpgsql;
CREATE FUNCTION
# insert into foobar values (('aoeu',current_timestamp)::info_base)
;
WARNING: ("(AAAAAAAAAAAAAAAAAA,""2013-06-24 11:55:55.610049"")")
Hope this was of some help...