Hi All,
(I'm sure I'm not the first person to want to do this, but I didn't see any
mention of it in the FAQ or developers FAQ nor in the docs - if I've missed
something, a gentle pointer will be fine :)
I was wondering if it is possible to create a table view based on a table
which is effectively an "attribute list".
For example, suppose I have two tables:
CREATE TABLE user
( userid integer, username character varying, userpassword character varying, startdate date
);
CREATE TABLE userdetail
( userid integer, attributename character varying, attributevalue character varying
);
"user" holds pre-defined details about a user (things which are common to all
users).
"userdetail" holds (name,value) pairs about users.
Now I want to make a public view of the user, which would have all of the
defined fields in user, and all of the defined attributes across userdetail.
(e.g. suppose we have 2 types of user - typeA has attributes x, y, z and typeB
has attributes a, b. Then I'd want my public view to look like):
CREATE TABLE PvUser
( userid integer, username character varying, userpassword character varying, startdate date, x character varying, y
charactervarying, z character varying, a character varying, b character varying
);
It is possible to do this (i.e. have the public view created by specifying the
column names "AS" the distinct value of a column in rows in another table?
CREATE VIEW PvUser AS
SELECT u.userid u.username u.password u.startdate -- For each unique attributename in userdetail ud.attributevalue AS
{Valueof ud.attributename}
FROM user u, userdetail ud
;
Is what I'm trying to do feasible?
Thanks for any and all help,
Damien
