-none- 2005-02-02 - By -not available-
Example:
select p.col_a, p.col_b, c.col_c, c.col_d
from (select x.col_a, x.col_b
from parent_table x
where complicated_filter_test = 'Y '
) p
,child_table c
where p.col_a = c.col_a
and p.col_b = c.col_b
Tuned properly, the time-consuming filter logic on the parent table only gets executed once per parent row instead of once per child row. I 've had success trying this approach before.
And, of course, you could always put the parent_table query in a view for re-use purposes.
-- --Original Message-- --
From: "Duret, Kathy " <kduret@(protected) >
Sent: Feb 2, 2005 10:55 AM
To: "Oracle L (E-mail) " <oracle-l@(protected) >
Subject: is there a way to return multiple cursors from a query
what I need to do is return a cursor from one query in a procedure.... no
problemo
What I need to do is :
for every ID returned in the first query returned ....use this in the where
condition of the child query.
Yes they want two separate cursors returned. so a function is out.
The first query is intensive so I don 't want to execute it twice.
This will be executed quite a bit and returns a fair amount of data.
Thanks,
Kathy
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