Foreign key constraint on sub-column of composite-type column - Mailing list pgsql-hackers

From David Lee
Subject Foreign key constraint on sub-column of composite-type column
Date
Msg-id 840CE09C-048A-4D91-9A11-4BE75D31C581@gmail.com
Whole thread Raw
Responses Re: Foreign key constraint on sub-column of composite-type column  (Simon Riggs <simon@2ndQuadrant.com>)
List pgsql-hackers
Hi,

I was trying to create foreign key constraints on a sub-column of a composite-type column, but couldn't find a way to
doit. After asking around on IRC, it seems like this isn't supported in PostgreSQL. 

I wanted to do something like:
create type profile as (account_id integer);
create table users (profile profile);
alter table users add constraint account_fk foreign key ((profile).account_id) references accounts;

Would this be a viable feature request?

--David


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