|REFRESH MATERIALIZED VIEW(7)||PostgreSQL 13.4 Documentation||REFRESH MATERIALIZED VIEW(7)|
REFRESH_MATERIALIZED_VIEW - replace the contents of a materialized view
REFRESH MATERIALIZED VIEW [ CONCURRENTLY ] name
[ WITH [ NO ] DATA ]
REFRESH MATERIALIZED VIEW completely replaces the contents of a materialized view. To execute this command you must be the owner of the materialized view. The old contents are discarded. 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. If WITH NO DATA is specified no new data is generated and the materialized view is left in an unscannable state.
CONCURRENTLY and WITH NO DATA may not be specified together.
This option is only allowed if there is at least one UNIQUE index on the materialized view which uses only column names and includes all rows; that is, it must not be an expression index or include a WHERE clause.
This option may not be used when the materialized view is not already populated.
Even with this option only one REFRESH at a time may run against any one materialized view.
While the default index for future CLUSTER(7) operations is retained, REFRESH MATERIALIZED VIEW does not order the generated rows based on this property. If you want the data to be ordered upon generation, you must use an ORDER BY clause in the backing query.
This command will replace the contents of the materialized view called order_summary using the query from the materialized view's definition, and leave it in a scannable state:
REFRESH MATERIALIZED VIEW order_summary;
This command will free storage associated with the materialized view annual_statistics_basis and leave it in an unscannable state:
REFRESH MATERIALIZED VIEW annual_statistics_basis WITH NO DATA;
REFRESH MATERIALIZED VIEW is a PostgreSQL extension.