Is it necessary to perform data view updates in PostgreSQL?

In PostgreSQL, updating the data display (for example, in a Materialized View) does not happen automatically when the underlying tables change. If a regular view (VIEW) is used, it always reflects the current data, as it is just a stored SQL query.

For a Materialized View, you need to explicitly execute the command REFRESH MATERIALIZED VIEW to update the data.

Thus, the need for updating depends on the type of view:

• VIEW — no update required, data is always current.
• MATERIALIZED VIEW — update is necessary to get fresh data.

Example of updating a materialized view:

REFRESH MATERIALIZED VIEW my_materialized_view;