I do not believe so. I believe an index is only used during the SELECT statement and then only when the indexed field is the only field in the select criteria.
So, if practical, use the indexed field in the first selection of the file, then all records will be in sorted order of the indexed field. Then narrow that list down by other, non-indexed fields. Sincerely, David Laansma Hubbard Supply Co. Direct: 810-342-7143 Office: 810-234-8681 Fax: 810-234-6142 www.hubbardsupply.com "Delivering Products, Services and Innovative Solutions" -----Original Message----- From: u2-users-boun...@listserver.u2ug.org [mailto:u2-users-boun...@listserver.u2ug.org] On Behalf Of Dave Davis Sent: Thursday, March 13, 2014 2:19 PM To: U2 Users List Subject: Re: [U2] unidata index Don't know - I wouldn't index a field for that reason alone. And it probably wouldn't help if you had other fields you were sorting by, or other fields you were selecting, in the same select statement. -----Original Message----- From: u2-users-boun...@listserver.u2ug.org [mailto:u2-users-boun...@listserver.u2ug.org] On Behalf Of Jeffrey Butera Sent: Thursday, March 13, 2014 2:15 PM To: U2 Users List Subject: [U2] unidata index Stupid index question: does indexing a field help performance when sorting BY that field but it's not otherwise involved in the query? -- Jeffrey Butera, PhD Associate Director for Applications and Web Services Information Technology Hampshire College 413-559-5556 http://www.hampshire.edu http://www.facebook.com/hampshirecollegeit _______________________________________________ U2-Users mailing list U2-Users@listserver.u2ug.org http://listserver.u2ug.org/mailman/listinfo/u2-users ________________________________ Dave Davis Team Lead, Research & Development P: 614-875-4910 x108 F: 614-875-4088 E: dda...@harriscomputer.com [http://www.harriscomputer.com/images/signatures/HarrisSchools.jpg] [http://www.harriscomputer.com/images/signatures/DivisionofHarris.gif]<http://www.harriscomputer.com/> 6110 Enterprise Parkway Grove City, OH 43123 www.harris-schoolsolutions.com<http://www.harris-schoolsolutions.com> This message is intended exclusively for the individual or entity to which it is addressed. This communication may contain information that is proprietary, privileged or confidential or otherwise legally exempt from disclosure. If you are not the named addressee, you are not authorized to read, print, retain, copy or disseminate this message or any part of it. If you have received this message in error, please notify the sender immediately by e-mail and delete all copies of the message. _______________________________________________ U2-Users mailing list U2-Users@listserver.u2ug.org http://listserver.u2ug.org/mailman/listinfo/u2-users _______________________________________________ U2-Users mailing list U2-Users@listserver.u2ug.org http://listserver.u2ug.org/mailman/listinfo/u2-users
