How do I drop a materialized view in hive?

How do I drop a materialized view in hive?

Drop a materialized view before performing a DROP TABLE operation on a related table. Hive does not support dropping a table that has a relationship with a materialized view. In this task, you drop a materialized view named mv1 from the my_database database. Drop a materialized view in my_database named mv1 .

Can you add index to materialized view?

A materialized view can be partitioned, and you can define a materialized view on a partitioned table. You can also define one or more indexes on the materialized view. Unlike indexes, materialized views can be accessed directly using a SELECT statement.

What happens when you drop a materialized view?

If you drop a materialized view that was created on a prebuilt table, then the database drops the materialized view, and the prebuilt table reverts to its identity as a table. When you drop a master table, the database does not automatically drop materialized views based on the table.

When do you add indexes to a materialized view?

When a materialized view is created Oracle may add system generated indexes to its underlying table (i.e. the table containing the results of the query, not to be confused with a base table).

Can a snapshot be used in place of materialized view?

The keyword SNAPSHOT is supported in place of MATERIALIZED VIEW for backward compatibility. The materialized view must be in your own schema or you must have the DROP ANY MATERIALIZED VIEW system privilege. You must also have the privileges to drop the internal table, views, and index that the database uses to maintain the materialized view data.

How to remove a materialized view in DataStax?

Immediate, irreversible removal of a materialized view, including all data it contains. This operation has no effect on the base table. Restriction: Drop all materialized views associated with a base table before dropping the table. Table 1. Literal keyword. Not literal.