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

[Dorian Hoxha <dorian.hoxha@xxxxxxxxx>]

Because i always query the whole row, and in the other way(many tables) i will always join + have other indexes.

On Sun, Apr 20, 2014 at 8:56 PM, Rob Sargent <robjsargent@xxxxxxxxx> wrote:

Why do you think you need an array of theType v. a dependent table of theType. This tack is of course immune to to most future type changess. 

Sent from my iPhone

On Apr 20, 2014, at 11:57 AM, Dorian Hoxha <dorian.hoxha@xxxxxxxxx> wrote:

Was just curious about the overhead.

I know the columns, but i may need to add other columns in the future.

Yeah, json is the alternative if this doesn't work.

On Sun, Apr 20, 2014 at 7:54 PM, Fede Martinez <federicoemartinez@xxxxxxxxx> wrote:

If you don't know the columns your type will have, you could consider using json or hstore if the data is unstructured.

El 20/04/2014 14:04, "Dorian Hoxha" <dorian.hoxha@xxxxxxxxx> escribió:

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