troubleshooting Question

How to create materialized view and capture the detail of refreshing activities ?

Avatar of VW 63654
VW 63654 asked on
Oracle Database
9 Comments3 Solutions534 ViewsLast Modified:
Hi experts,

I am not an expert on this but I have a very basic knowledge on creating simple MV using Oracle 11g.

I have access to some view tables (remotedb). I don't know how the view was created, whether it is a simple
view or complicated queries.

So we have created dblink to their remotedb and creating synonym table for each view that been granted to access.
On top of this, I also need to monitor all refresh activities to ensure nothing goes wrong during refresh process.
Some refresh may take some time and if there is any error, I have to stop and start refreshing it again.
This to be done everyday.

Here is my script to create MV:
drop materialized view MV_VIEW01;
select * from synonym_table_view01;

Refresh materialized view:
-- refresh mat views table
-- and keep record all activities (starttime, endtime, how_long in seconds and total records) stored in MAT_VIEWS_REFRESH_LOGS table.

-- insert start time
insert into MAT_VIEWS_REFRESH_LOGS (mvname,start_date) values ('MV_VIEW01',sysdate);


-- once done
update MAT_VIEWS_REFRESH_LOGS set end_date = sysdate where mvname = 'MV_VIEW01' and end_date is null;

-- counting total records after refresh
update MAT_VIEWS_REFRESH_LOGS set total_rows = (select count(*) from MV_VIEW01);

update MAT_VIEWS_REFRESH_LOGS set total_sec = (end_date - start_date) * 24 * 60 * 60
where id = (select max(id) from MAT_VIEWS_REFRESH_LOGS);


And I need to do it all for 8 materialized views.
So my questions are :

How can I improve the script so that all refresh process can run automatically for every MV everyday at 6pm except for Friday and Sunday?
I don't want to set the time during the creation process because I want to create once but may change the timing later.

How can I capture any error during the refresh process ?
Is there any build-in function that generate such logs ?
Is there any way to make the refresh process improved (more faster) ?

I need your guidance step by step how to do this.

Thank you.
VW 63654

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