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According to the oracle documents, we can not use fast refresh method for refreshing aggregate materialized view. I found this example in Oracle documents: http://docs.oracle.com/cd/B19306_01/server.102/b14200/statements_6002.htm

CREATE MATERIALIZED VIEW LOG ON times WITH ROWID, SEQUENCE (time_id, calendar_year) INCLUDING NEW VALUES; CREATE MATERIALIZED VIEW LOG ON products WITH ROWID, SEQUENCE (prod_id) INCLUDING NEW VALUES; CREATE MATERIALIZED VIEW sales_mv BUILD IMMEDIATE REFRESH FAST ON COMMIT AS SELECT t.calendar_year, p.prod_id, SUM(s.amount_sold) AS sum_sales FROM times t, products p, sales s WHERE t.time_id = s.time_id AND p.prod_id = s.prod_id GROUP BY t.calendar_year, p.prod_id;

every time which I tried to use aggregations and fast refresh with each other I got error.
Is there any special tips in case of using fast refresh and aggregation functions with each other?

Kind Regards

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  • Can you please post the error message that you are getting as well, thanks. Commented Sep 8, 2014 at 8:58

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According to my survey, for creating MV with aggregation functions and fast refresh method ,your MV and MV log should have special strucures,for seeing correct structures of MV and MV log run below scripts:

begin dbms_advisor.tune_mview(task_name=>:t, mv_create_stmt=>'create materialized view mv1 refresh fast as select job,sum(sal) from emp group by job'); end;

then execute below query to see the desired structures for MV and MV logs:

select dbms_lob.substr( statement, 4000, 1 ), statement from user_tune_mview where task_name='TASK_2042' order by action_id;
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