# REFRESH_MATERIALIZED_VIEW(7) - man - phpMan

REFRESH MATERIALIZED [VIEW(7)](https://www.chedong.com/phpMan.php/man/VIEW/7/markdown)       PostgreSQL 14.23 Documentation       REFRESH MATERIALIZED [VIEW(7)](https://www.chedong.com/phpMan.php/man/VIEW/7/markdown)



## NAME
       REFRESH_MATERIALIZED_VIEW - replace the contents of a materialized view

## SYNOPSIS
       REFRESH MATERIALIZED VIEW [ CONCURRENTLY ] _name_
           [ WITH [ NO ] DATA ]

## DESCRIPTION
       **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.

## PARAMETERS
       CONCURRENTLY
           Refresh the materialized view without locking out concurrent selects on the materialized
           view. Without this option a refresh which affects a lot of rows will tend to use fewer
           resources and complete more quickly, but could block other connections which are trying
           to read from the materialized view. This option may be faster in cases where a small
           number of rows are affected.

           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.

       _name_
           The name (optionally schema-qualified) of the materialized view to refresh.

## NOTES
       If there is an ORDER BY clause in the materialized view's defining query, the original
       contents of the materialized view will be ordered that way; but **REFRESH** **MATERIALIZED** **VIEW**
       does not guarantee to preserve that ordering.

## EXAMPLES
       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;

## COMPATIBILITY
       **REFRESH** **MATERIALIZED** **VIEW** is a PostgreSQL extension.

## SEE ALSO
       CREATE MATERIALIZED VIEW (**CREATE**___**MATERIALIZED**___**[VIEW**(7)](https://www.chedong.com/phpMan.php/man/VIEW/7/markdown)), ALTER MATERIALIZED VIEW
       (**ALTER**___**MATERIALIZED**___**[VIEW**(7)](https://www.chedong.com/phpMan.php/man/VIEW/7/markdown)), DROP MATERIALIZED VIEW (**DROP**___**MATERIALIZED**___**[VIEW**(7)](https://www.chedong.com/phpMan.php/man/VIEW/7/markdown))



PostgreSQL 14.23                                2026                    REFRESH MATERIALIZED [VIEW(7)](https://www.chedong.com/phpMan.php/man/VIEW/7/markdown)