What is table predefined?

Hi there;


http://docs.oracle.com/cd/B10500_01/server.920/a96520/mv.htm

At this link, there is a sentence as such:

When you delete a materialized view that is created on a table preconstruitse, the table still exists – only the materialized view is dropped.

When a predefined table is stored as a materialized view and query rewrite is desired, the parameter QUERY_REWRITE_INTEGRITY must be set at least to stale_tolerated because when it is created, the materialized view is marked as unknown. Therefore, only the stale integrity modes can be used.


What is table predefined? Thanks in advance.

A MV is just a table under the covers.

When you create the MV, if you already have a table with data, you can specify to create the MV using the already built table.

Tags: Database

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