How to time a procedure

Question

hi i have a view when i time that view using
set timing on ;
set autotrace trace;
select * from emp_view where emp_id='abc' ;
it takes 200 milli seconds to return the rows
i have another procedure which accepts emp_id as in put
in side the procedure I am calling this view with the same filter and making a union to another view and returning the resultset
but when i time it it returns me 20 milli seconds
i tested this in sql plus
where did i go wrong. is it the right way to time a procedure?
Edited by: raj_fresher on Nov 4, 2009 12:49 PM

Answer 1

So you have timed:
1) a query in sqlplus that fetches rows, and you timed it all the way till it fetched the last row?
2) a (similar) query embedded as a cursor inside a stored proc, which cursor you opened and then fetched all rows until %NOTFOUND?
In the former case, you have retrieved all rows accross the network from the database server to the sqlplus client: this takes time.
In the latter case, you have retrieved all rows and put then INTO the stored procedure's local pl/sql variables: this does not involve any network roundtrips at all.
It's not strange that the latter case took less time.