Wednesday, December 13, 2006

Parameterized View

I always used to think why oracle didn't provide parameterized views similar to parameterized cursors, till I found workaround for the same.

Following is an example which shows use of parameterized view:

CREATE OR REPLACE VIEW test_vw AS
SELECT empno,ename,sal
FROM emp
WHERE empno = to_number(userenv('client_info')) ;

In Stored Procedure, will have to call following procedure before executing the View query, as in following example:

exec dbms_application_info.set_client_info(7934);

select * from test_vw ;

And the output is:

EMPNO ENAME SAL
---------- ---------- ----------
7934 MILLER 13040

48 comments:

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Anonymous said...

How can we use two or more parameters for the view?

Anonymous said...

Good Article

Anonymous said...

Hi,

I found the best way to put 2 parameters is to work around and put the parameters all in one value then separate them according to pre-defined pattern to useful values inside the view code.

Cheers,
Feras

Anonymous said...

thanks for the article.
one comment :
In Oracle/PLSQL, the userenv function can be used to retrieve information about the current Oracle session. Although this function still exists in Oracle for backwards compatibility, it is recommended that you use the sys_context function instead.
Applies To: Oracle 8i, Oracle 9i, Oracle 10g, Oracle 11g
source :
http://www.techonthenet.com/oracle/functions/sys_context.php

Coder said...

You can use public package variables for the same purpose.
In this way you can easily use any number of them.

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