> CREATE ROLE bar LOGIN; > CREATE TABLE a (x int); > CREATE MATERIALIZED VIEW b AS SELECT * FROM a; > \c - bar > REFRESH MATERIALIZED VIEW b; > ERROR: must be owner of materialized view b > > I'm happy to generate the backpatches for it but wanted to receive feedback > first. So for the parser, a materialized view is a relation, just like a table or a view. It's not exactly what I wanted because the trigger fires once per statement instead of once per transaction. The upcoming version of Postgres is adding many basic things like the possibility to create, manage and refresh a materialized views. A complete refresh occurs when the materialized view is initially defined as BUILD IMMEDIATE, unless the materialized view references a prebuilt table.For materialized views using BUILD DEFERRED, a complete refresh must be requested before it can be used for the first time.A complete refresh may be requested at any time during the life of any materialized view. The old contents are discarded. Take, for example, a view created on the pgbench dataset (scale 100, after ~150,000 transactions): postgres=# CREATE OR REPLACE VIEW account_balances AS SELECT a. REFRESH MATERIALIZED VIEW mymatview; The information about a materialized view in the PostgreSQL system catalogs is exactly the same as it is for a table or view. Unfortunately in such cases, only the latest query is of any relevance; all the previous queries consume processing time in vain to refresh … However, there are two preconditions that needs to be satisfied to do so: You must create an unique index on the materialized view; The unique index must include all the records of the materialized view. Refreshing all materialized views. REFRESH MATERIALIZED VIEW completely replaces the contents of a materialized view. Occasionally, I receive back-dates. However, materialized views in Postgres 9.3 have a severe limitation consisting in using an exclusive lock when refreshing it. However, since 9.5 I believe, there is a way to update a MV without having to regenerate all the data. I'd like to give users looking at the report a message "Data is fresh as of X". But it works for now. Postgres 9.3 has introduced the first features related to materialized views. I've also got a cron job refreshing the materialized view with refresh materialized view price_changes.Everything is working great. One could create a PL/PGSQL function that uses these views to refresh all materialized views at once, but as this is a relatively rare command to execute that can take a long time to run, I figured it was best just to use these views to generate the code one needs to execute and then execute that code. I have a very complex Oracle view based on other materialized views, regular views as well as some tables (I can't "fast refresh" it). To execute this command you must be the owner of the materialized view. 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