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RE: Pipelined table Functions

From: Jamadagni, Rajendra <Rajendra.Jamadagni_at_espn.com>
Date: Fri, 9 Apr 2004 07:36:29 -0400
Message-ID: <A186CBDC8B1D61438BC50F1A77E91F73057C1CED@xchgbrsm1.corp.espn.pvt>


Wow ... when I implemented pipelined functions, I didn't really care = much about what happens in SGA and PGA. I wanted to get data fast i.e. = as soon as available (as in select statements) and couldn't wait sitting = around for oracle to return ALL data at once (as it happens in = functions and procedures).

My recommendation is 'to try it first' ... in your environment and then = see. If I mention any inefficiency, it may or may not happen in your = environment. In early versions of 9i, there were few bugs, but most were = resolved by 9202 ... but it is worth checking at Metalink.

One thing you should watch out for is ... pipelined functions still have = an outstanding issue with cursor_sharing=3Dforce setting, they like it = to be EXACT and dislike FORCE for whatever reason.

Try it out ... it is a nice feature.
Raj

-----Original Message-----

From: oracle-l-bounce_at_freelists.org
[mailto:oracle-l-bounce_at_freelists.org]On Behalf Of sushma manjunath Sent: Friday, April 09, 2004 7:27 AM
To: oracle-l_at_freelists.org
Subject: Re: Pipelined table Functions

Is their some white paper or documentation that describes in detail how = a=20
table function affects a system, and what happens within the SGA / PGA = when=20
this process runs. I have read the docs on OTN and they explain pipeline = and=20
parallel but do not go into any down side for this function in an OLAP=20 environment. I am looking for some possible repercussions of this = function=20
in the way of resource, and performance issues that might arise.



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Received on Fri Apr 09 2004 - 11:40:53 CDT

Original text of this message

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