RE: Remote Materialized View containing joins

From: Xu, Roger <Roger.Xu_at_dpsg.com>
Date: Wed, 20 May 2009 11:38:42 -0600
Message-ID: <3DC31002EB0BDD46B2B5730CEDF027704D8EA6_at_bcxoemb03.dpsg.net>

I thought about that but we have space issue, owner issue ... etc. By the way, I haven't started any work yet. It's under the planning phase now. I am also considering complete refresh as well. Thanks.

-----Original Message-----
From: Stephane Faroult [mailto:sfaroult_at_roughsea.com] Sent: Wednesday, May 20, 2009 12:04 PM
To: Xu, Roger
Cc: oracle-l_at_freelists.org; oracle-l-bounce_at_freelists.org Subject: Re: Remote Materialized View containing joins

Roger,

    If I were you I'd start with creating a view that performs the join (including the rowids) _at_remotedb, then create the MV by pulling information from this view.

HTH Stéphane Faroult

Xu, Roger wrote:
>
> 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_at_remotedb s, times_at_remotedb t, customers_at_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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Received on Wed May 20 2009 - 12:38:42 CDT