xchris wrote:
CREATE TYPE address AS
(
street VARCHAR(160),
city INTEGER,
cap INTEGER,
country INTEGER (those are referring to other table)
);
and then composing table client
CREATE TABLE client
(
id SERIAL PRIMARY KEY,
name VARCHAR(80),
surname VARCHAR(80),
address address[3]
....
UNIQUE (name,surname)
);
This doesn't work.
I cannot create a list of types.
I'm using a wrong syntax? or simply i cannot do this?
From the manuals...
8.10. Arrays
PostgreSQL allows columns of a table to be defined as variable-length
multidimensional arrays. Arrays of any built-in or user-defined base
type can be created. (Arrays of composite types or domains are not yet
supported, however.)
So - you can't do this at the moment.
However - I don't think you want to anyway. If you're going to use a
relational database, try a relational approach! Typically, you would do
something like:
CREATE TABLE client (id ..., name ...)
CREATE TABLE address (id ..., street ...)
CREATE TABLE client_address (client_id ..., address_id ...)
Then, you can add some foreign-key constraints so PG makes sure that the
ID numbers in client_address are all valid.
This makes it simple to get client names, client addresses or both together.
HTH
--
Richard Huxton
Archonet Ltd
---------------------------(end of broadcast)---------------------------
TIP 9: In versions below 8.0, the planner will ignore your desire to
choose an index scan if your joining column's datatypes do not
match
