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Home -> Community -> Mailing Lists -> Oracle-L -> function based indexes.
I don't think this is possible but I would like to confirm here.
I would like to create a function based index to speed up the OH SO SLOW query that follows:
SELECT dmzu.ZIP_CODE
FROM dm_zip_unq dmzu
WHERE fnc_dist(some number,some number,dmzu.LATITUDE,dmzu.LONGITUDE)< power(100,2) )
Here is the function definition:
CREATE OR REPLACE FUNCTION fnc_Dist (
inp_lat DM_ZIP_UNQ.LATITUDE%TYPE,
inp_lng DM_ZIP_UNQ.LONGITUDE%TYPE,
dl_lat DM_ZIP_UNQ.LATITUDE%TYPE,
dl_lng DM_ZIP_UNQ.LONGITUDE%TYPE)
RETURN NUMBER IS BEGIN RETURN (POWER((69.1*(dl_lng - inp_lng ) * COS(inp_lat / 57.3)), 2) + POWER((69.1*(dl_lat - inp_lat)),2));
END fnc_Dist;
/
....with those first 2 parameters, I won't be able to create the function based index correct?
Any ideas on how to alter the design of the query?
The idea is to provide the functionality to locate a dealer of a certain product when given a certain longitude and latitude.
I pretty much know the answer to my question but am looking for any and all design suggestions.
Thanks. BEER ME!
chris
-----Original Message-----
Sent: Friday, February 21, 2003 12:50 PM
To: Multiple recipients of list ORACLE-L
Since SharePlex for Oracle and LiveReorg are dependant on redo log volumes, transaction sizes, and things like that we have developed a free utility that parses through the redo logs for some pre-defined amount of time, and let's you know how many operations are on each table, average operations per second, and peak operations per second. It should give you a really good idea where the activity is coming from.
Send me a private email if you want me to get you set up on this, and I can send you the files, and the instructions on how to use it.
Nick
(nick.wagner_at_quest.com)
p.s. 28GB is good, but we've seen much more... around 100GB is massive, and we've seen maybe 2-3 databases up to 120GB per day.
-----Original Message-----
Sent: Friday, February 21, 2003 7:44 AM
To: Multiple recipients of list ORACLE-L
Just had a thought here, have not tried it yet. I have a database that I am
working with that is generating 28 GB of redo each day. I would really like
to know what objects are generating all this redo without going through the hassle of mining a bunch of log files. It occurred to me that if table monitoring is active and my stats are up to date I should be able to multiply the total number of updates, inserts and commits by the average row
size and get a rough % of what objects are generating the most redo.
I am sure there are a number of other factors I need to consider, any ideas what they are?
The goal is to identify the objects, then identify the jobs that work on those objects and see if I can reduce redo. I suspect a lot of this redo is
being generated because of some poor design issues.
Thanks!
Fat City Network Services -- 858-538-5051 http://www.fatcity.com
<http://www.fatcity.com>
San Diego, California -- Mailing list and web hosting services
-- Please see the official ORACLE-L FAQ: http://www.orafaq.net -- Author: Chris Stephens INET: ChrisStephens_at_affina.com Fat City Network Services -- 858-538-5051 http://www.fatcity.com San Diego, California -- Mailing list and web hosting services --------------------------------------------------------------------- To REMOVE yourself from this mailing list, send an E-Mail message to: ListGuru_at_fatcity.com (note EXACT spelling of 'ListGuru') and in the message BODY, include a line containing: UNSUB ORACLE-LReceived on Fri Feb 21 2003 - 13:54:57 CST
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