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Insert into Oracle from Discoverer Worksheets

Oracle Tips by Burleson Consulting
Don Burleson


By Mark Rittman

Having Discoverer Worksheets Write-Back To The Database

Looking to have Discoverer write back information to the database whenever a report is run? According to "Discoverer Administrator?How to Perform DML Operations in Discoverer?", the answer is to embed your update, insert or select statement within a function, declare the function as an autonomous transaction, and add that as an item in your worksheet.

Oracle Autonomous Transactions are 'subtransactions' that can take place independently of any transaction that calls it. Functions that are called from Discoverer normally can't perform any DDL, but if you declare them as autonomous transactions by using the Pragma autonomous_transaction directive they'll get through.

For example, you might have a report that lists out salespeople and their total sales this quarter. You want to log in an audit table the person who ran the report, and what salespeople they displayed in their report. You could then build a function like this:

create or replace function f_report_audit (

                          user varchar2 varchar2(20),

                          salesperson_id varchar2(20),

                          sales_this_quarter number(11,2),

                          when_dt date)

return varchar2

is

    pragma autonomous_transaction;

begin

 

    insert into Audit_report

    values(audit_seq.nextval,

           user,

           salesperson_id,

           sales_per_quarter,

           sysdate); 

     commit; 

     return null;

end;

You would then register this function within Discoverer Administrator, create an item based on this function and supply the necessary parameters (from the other items in the worksheet, plus the 'User' variable that returns the logged-in userid), then add the item to the report. As the function returns a null, there'll be nothing added to the report, but the key values in the report will now be written to the database alongside the userid and time the report was run.

Insert into Oracle from Discoverer Worksheets. 



 

 

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