On Tue, Apr 05, 2016 at 07:10:56PM -0400, Robert Haas wrote:
> On Tue, Apr 5, 2016 at 6:50 PM, David Fetter <da...@fetter.org> wrote:
> > Is there a reason other than lack of tuits for this restriction?
>
> "this" lacks an antecedent.
Try to put a primary key on a materialized view, for example:
CREATE TABLE foo(id SERIAL PRIMARY KEY, t text);
CREATE MATERIALIZED VIEW bar AS SELECT * FROM foo;
REFRESH MATERIALIZED VIEW bar;
ALTER MATERIALIZED VIEW bar ADD PRIMARY KEY(id);
At that last step, you get an error that bar is not a table. You get
an identical error with the hoary old trick of
ALTER TABLE bar ADD PRIMARY KEY(id);
This lack prevents things that depend on primary keys (foreign keys,
logical replication, etc.) from operating on the materialized views.
Cheers,
David.
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