Description. I've also got a cron job refreshing the materialized view with refresh materialized view price_changes.Everything is working great. REFRESH MATERIALIZED VIEW view_name. I'd like to give users looking at the report a message "Data is fresh as of X". You can load data into materialized view using REFRESH MATERIALIZED VIEW statement as shown. Considerations. PostgreSQL Materialized View Refresh. The upcoming version of Postgres is adding many basic things like the possibility to create, manage and refresh a materialized views. I've got a materialized view called price_changes used for some reporting. The above answers work fine if the materialized views do not depend on each other. Please note, REFRESH MATERIALIZED VIEW statement locks the query data so you cannot run queries against it. To better optimize your materialized view queries, you can add indexes to the materialized view … 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. You can also use the above statement to refresh materialized view. This option is really good, specially with CONCURRENTLY option, but only if you can … But avoid …. Asking for help, clarification, or … If WITH DATA is specified (or defaults) the backing query is executed to provide the new data, and the materialized view is left in a scannable state. I hope you like this article on Postgres Materialized view with examples. Hoping that all concepts are cleared with this Postgres Materialized view article. 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. Refreshing all materialized views. However, materialized views in Postgres 9.3 have a severe limitation consisting in using an exclusive lock when refreshing it. To execute this command you must be the owner of the materialized view. PostgreSQL 9.4 allows you to refresh your view in a way that enables queries during the refresh: REFRESH MATERIALIZED VIEW CONCURRENTLY my_view. REFRESH MATERIALIZED VIEW completely replaces the contents of a materialized view. This will refresh the data in materialized view concurrently. If that is not the case, then the order in which the materialized views are refreshed is important (i.e., you need to refresh the materialized views that don't depend on any other materialized views before you refresh … Postgres 9.3 has introduced the first features related to materialized views. If you have any queries related to Postgres Materialized view kindly comment it in to comments section. The updated patch can be tested as such: > > 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. Please be sure to answer the question.Provide details and share your research! 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. 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