create index ixprintjobsapplicationtype on tblPrintjobs (applicationtype);
create index ixprintjobsdesceventdate on tblPrintjobs (desceventdate);
create index ixprintjobsdesceventtime on tblPrintjobs (desceventtime);
create index ixprintjobsdescpages on tblPrintjobs (descpages);
create index ixprintjobsdocumentname on tblPrintjobs (documentname) ;
create index ixprintjobseventcomputer on tblPrintjobs (eventcomputer);
create index ixprintjobseventdate on tblPrintjobs (eventdate);
create index ixprintjobseventtime on tblPrintjobs (eventtime);
create index ixprintjobseventuser on tblPrintjobs (eventuser);
create index ixprintjobshostname on tblPrintjobs (hostname) ;
create index ixprintjobsipaddress on tblPrintjobs (ipaddress) ;
create index ixprintjobsloginuser on tblPrintjobs (loginuser) ;
create index ixprintjobspages on tblPrintjobs (pages) ;
create index ixprintjobsprintport on tblPrintjobs (printport) ;
create index ixprintjobsprintqueue on tblPrintjobs (printqueue) ;
create index ixprintjobsrecordnumber on tblPrintjobs (recordnumber) ;
create index ixprintjobssize on tblPrintjobs (size) ;
create index ixprintjobsusertype on tblPrintjobs (usertype) ;
create index ixPrintjobsDescpagesDocumentname on tblPrintjobs (descpages, documentname) ;
create index ixPrintjobsHostnamePrintqueueDesceventdateDesceventtime on tblPrintjobs (hostname, printqueue, desceventdate, desceventtime) ;
create index ixPrintjobsLoginDescEventdateDesceventtime on tblPrintjobs (loginuser, desceventdate, desceventtime) ;
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On 21 Jun 2005, at 16:42, Tom Lane wrote:
Yves Vindevogel <[EMAIL PROTECTED]> writes:Met vriendelijke groeten,
Can anyone explain me this ?
rvponp=# explain select * from tblprintjobs order by loginuser,
desceventdate, desceventtime offset 25 limit 25 ;
QUERY PLAN
------------------------------------------------------------------------
-----------
Limit (cost=349860.62..349860.68 rows=25 width=206)
-> Sort (cost=349860.56..351416.15 rows=622236 width=206)
Sort Key: loginuser, desceventdate, desceventtime
-> Seq Scan on tblprintjobs (cost=0.00..25589.36 rows=622236 width=206)
(4 rows)
Do you have an index matching that sort key? I'd certainly expect the
above to use it if it were there. For the full table case it's not so
clear --- an indexscan isn't always better.
regards, tom lane
Bien à vous,
Kind regards,
Yves Vindevogel
Implements
Mail: [EMAIL PROTECTED] - Mobile: +32 (478) 80 82 91
Kempische Steenweg 206 - 3500 Hasselt - Tel-Fax: +32 (11) 43 55 76
Web: http://www.implements.be
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First they ignore you. Then they laugh at you. Then they fight you. Then you win.
Mahatma Ghandi.</x-tad-smaller>
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