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What causes a materialized view to become invalid?
When an MV is created, the materialized view depends on the master tables referenced in its definition. Any DML operation, such as an INSERT, or DELETE, UPDATE, or DDL operation on any dependency in the materialized view will cause it to become invalid.
What is a view when will a view turn into invalid state?
For example, if a table’s structure is altered, such as by a change to a column’s datatype, or perhaps if a column is dropped from the table altogether – a column that is used by the view — then it may change the status of the view to ‘INVALID’.
How do I alter a materialized view in postgresql?
ALTER MATERIALIZED VIEW changes various auxiliary properties of an existing materialized view. You must own the materialized view to use ALTER MATERIALIZED VIEW. To change a materialized view’s schema, you must also have CREATE privilege on the new schema.
Why do Oracle views become invalid?
Objects go to an invalid state when a dependency is changed; a view, a package, a table, etc. For example, if you add a column to a table, any dependent views or code (packages or standalone procedures/functions) will be marked as invalid.
How do you make an invalid object valid in Oracle?
Whenever an oracle object is marked as invalid because of a table, that has been changed, the Oracle professional can change the object to valid by using a SQL*Plus script.
When does materialized view become invalid and user?
Materialized view go into INVALID state when it freshes after every 5 minutes and become valid if any of the following method applied: Also, checked related documents and bugs, Doc ID 264036.1 in metalink has included the exact scenario but didn’t find proper workaround so that auto refresh in every 5 minutes. That is the expected behaviour.
Which is version of materialized view does it reproduce?
The Version where the Master table is located is 9.2.0.6 in this customer’s case. The Version where the MVIEW is being created is 10.2.0.4 in this case. So, this does not reproduce in 10.2.0.4. So, this looks like some issue between 10.2 and 9.2.
What causes a MV to be invalidated to needs?
Dependencies related to MVs are automatically maintained to ensure correct operation. When an MV is created, the materialized view depends on the master tables referenced in its definition. Any DML operation, such as an INSERT, or DELETE, UPDATE, or DDL operation on any dependency in the materialized view will cause it to become invalid.
How to create a materialized view in Java?
My materialized view opotions are as listed below and confirming that associated objects are valid all the time. CREATE materialized VIEW mv_emp_test1 NOLOGGING COMPRESS build IMMEDIATE REFRESH FORCE START WITH (SYSDATE) NEXT (SYSDATE+5/1024) as ……