Remote Materialized View containing joins
- From: "Xu, Roger" <Roger.Xu@xxxxxxxx>
- To: <oracle-l@xxxxxxxxxxxxx>, <oracle-l-bounce@xxxxxxxxxxxxx>
- Date: Wed, 20 May 2009 10:32:04 -0600
I am trying to go with fast refresh but I am not sure the performance
issue I may face. Any suggestion? (10.2.0.4)
* creating MV logs in the remote database
CREATE MATERIALIZED VIEW LOG ON sales WITH ROWID;
CREATE MATERIALIZED VIEW LOG ON times WITH ROWID;
CREATE MATERIALIZED VIEW LOG ON customers WITH ROWID;
* creating MV in the local database
CREATE MATERIALIZED VIEW detail_sales_mv
BUILD IMMEDIATE
REFRESH FAST ON DEMAND
AS
SELECT s.rowid "sales_rid", t.rowid "times_rid", c.rowid
"customers_rid",
c.cust_id, c.cust_last_name, s.amount_sold, s.quantity_sold,
s.time_id
FROM sales@remotedb s, times@remotedb t, customers@remotedb c
WHERE s.cust_id = c.cust_id
AND s.time_id = t.time_id;
CREATE INDEX mv_ix_cust ON detail_sales_mv("customers_rid");
CREATE INDEX mv_ix_time ON detail_sales_mv("times_rid");
CREATE INDEX mv_ix_sale ON detail_sales_mv("sales_rid");
Thanks,
Roger Xu
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