Re: Get / Set Composite Type Fields within triggers

From: Ingmar Brouns <swingi(at)gmail(dot)com>
To: Martin Durao <durao(dot)martin(at)gmail(dot)com>
Cc: pgsql-general(at)postgresql(dot)org
Subject: Re: Get / Set Composite Type Fields within triggers
Date: 2013-06-24 10:08:11
Message-ID: CA+77E=ZWQ-ns8fkkWbkL+rvW++aXUdLXbA-VAEE61a-eSs1fUA@mail.gmail.com
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> 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...

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