Why is materialized view not fast refreshable in Oracle?
The materialized view is not fast refreshable because DML has occurred to a table on which PCT fast refresh is not possible. To avoid this occurring, Oracle recommends performing a fast refresh immediately after any partition maintenance operation on detail tables for which partition tracking fast refresh is available.
Which is the best way to refresh a materialized view?
As described in ” About Materialized View Schema Design “, you can use the SQL*Loader or any bulk load utility to perform incremental loads of detail data. Fast refresh of your materialized views is usually efficient, because instead of having to recompute the entire materialized view, the changes are applied to the existing data.
Where do I find materialized view log in Oracle?
1) An Oracle materialized view log must be present for each base table. 2) The RowIDs of all the base tables must appear in the SELECT list of the MVIEW query definition.
Why do I get an error on refresh _ fast?
You will get the error on REFRESH_FAST, if you do not create materialized view logs for the master table (s) the query is referring to. If anyone is not familiar with materialized views or using it for the first time, the better way is to use oracle sqldeveloper and graphically put in the options, and the errors also provide much better sense.
What are the different types of refresh for materialized views?
About Types of Refresh for Materialized Views. The refresh method can be incremental or a complete refresh. There are two incremental refresh methods, known as log-based refresh and partition change tracking (PCT) refresh. The incremental refresh is commonly called FAST refresh as it usually performs faster than the complete refresh.
When is materialized view not compatible with base table?
When a materialized view is created on both base tables with timestamp-based materialized view logs and base tables with commit SCN-based materialized view logs, an error (ORA-32414) is raised stating that materialized view logs are not compatible with each other for fast refresh.
How to create scheduler for manually REFRESH MATERIALIZED?
I’ve a problem to Automatically Refresh Materialized View, if the stallness condition is NEED_COMPILE / STALE / UNUSABLE OR NOT FRESH. btw, my MV is too complex to put it here so I made it simple in here.