ALTER MATERIALIZED VIEW REBUILD

Syntax

ALTER MATERIALIZED VIEW [db_name.]materialized_view_name REBUILD;

db_name.materialized_view_name

The database name followed by the name of the materialized view in dot notation.

Description

A rewrite of a query based on a stale materialized view does not occur automatically. If you want a rewrite of a stale or possibly stale materialized view, you can force a rewrite. For example, you might want to use the contents of a materialized view of a non-transactional table because the freshness of such a table is unknown. To enable rewriting of a query based on a stale materialized view, you can run the rebuild operation periodically and set the following property: hive.materializedview.rewriting.time.window. For example, SET hive.materializedview.rewriting.time.window=10min;

Example

ALTER MATERIALIZED VIEW mydb.mv1 REBUILD;