Altering array(composite-types) without breaking code when inserting them and similar questions

From: Dorian Hoxha <dorian(dot)hoxha(at)gmail(dot)com>
To: PostgreSql-general <pgsql-general(at)postgresql(dot)org>
Subject: Altering array(composite-types) without breaking code when inserting them and similar questions
Date: 2014-04-20 17:02:10
Message-ID: CANsFX06HwC5YNLxs=Ov7+yzicZ8x9E1YG_fb0M-FE=kFkbmV2A@mail.gmail.com
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Hi list,

I have a
create type thetype(width integer, height integer);
create table mytable(thetype thetype[]);

How can i make an insert statement so if i later add fields to the
composite type, the code/query doesn't break ?
Maybe by specifying the fields of the composite type in the query ?

This can be done for normal inserts(non arrays):
CREATE TABLE mytable (t thetype);
INSERT INTO mytable(t.width, t.height) VALUES (11,22);

Also how to update an whole element of an array of composites ?
Also, how to update an attribute in a specific element in an array of
composites?

(so when i add columns later to the composite, my old code doesn't break)

How much overhead have the composite types beside the values and nulls?

Thanks

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