I'll have to play with this later - thanks for the info... George
-----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Brian Leach Sent: Thursday, October 18, 2012 6:50 AM To: 'U2 Users List' Subject: Re: [U2] Selection Suggestions for using UV instead of SQL Since the index files are actually type 25 files, you can always (though of course I would NEVER recommend this ... ) create a file pointer direct to the INDEX.nnn and read the entries as records ... saves grabbing a select list .. Brian -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Wols Lists Sent: 18 October 2012 09:53 To: [email protected] Subject: Re: [U2] Selection Suggestions for using UV instead of SQL On 18/10/12 09:29, Martin Braid wrote: > I think you mean > SELECTINDEX index.name[,key.val] FROM file.var [TO list.num] > Martin Followed by a READLIST ... Quite possibly - I can't remember. One *important* point to note - if you are planning to call this from an i-descriptor, as I did, don't forget you MUST save that to a non-default list, or any attempt to LIST the idescriptor will go horribly wrong... Cheers, Wol > > -----Original Message----- > From: [email protected] > [mailto:[email protected]] On Behalf Of Wols Lists > Sent: 18 October 2012 08:55 > To: [email protected] > Subject: Re: [U2] Selection Suggestions for using UV instead of SQL > > On 17/10/12 16:40, George Gallen wrote: >> How would I get the contents of the Index? >> >> George > > Don't have the UV BASIC manual in front of me, but it's something like > > READINDEX variable FROM filedescriptor, indexname[, indexvalue] > > If you only pass filedescriptor and indexname, it will return a list of > all the index values. If you also pass indexvalue, it will return a list > of all keys for that value. > > I'll have a look later and see if I can find that routine - it's > probably on my system somewhere, but my archives aren't that > organised... > > Cheers, > Wol >> >> -----Original Message----- >> From: [email protected] >> [mailto:[email protected]] On Behalf Of Wols Lists >> Sent: Wednesday, October 17, 2012 11:38 AM >> To: [email protected] >> Subject: Re: [U2] Selection Suggestions for using UV instead of SQL >> >> On 17/10/12 14:59, George Gallen wrote: >>> Ok. >>> >>> I have file1 - "people" that has @ID of PID I have file2 - >>> "registration" that has @ID of PID+EID+RID (EID = event id, RID = >>> registration id) >>> >>> I want to select people who are not in the registration file with an > EID of "1". >>> >>> With an SQL statement - I could join the two, then do the select or >>> use a subquery (I'm on UV 10.0.2 - not sure if sub querys work) Just > curious how this could be done with UV Native, and without involving a > program. >>> >>> I first tried "SELECT REGISTRATION WITH EID = '1' SAVING UNIQUE PID" > -> "NSELECT PEOPLE" >>> >>> But that returned 0 - since the NSELECT only works off the current >>> select list, not the whole file >>> >>> Yes, I could create a temporary file, then select off that Yes, I >>> could read each people record, then loop through registration to see > if it doesn't exist. >>> Both of the above require programming I guess I could create a >>> subroutine that does the looping through registration, and put that > into an I descriptor - looking for another option. >>> >> Hmmm... >> >> What I guess I'd do - create an index on file2 based on PID. >> >> Create an idescriptor on file1 that gets the contents of that index. I > >> had a routine somewhere that got fed an index value and file, and >> returned the contents of the index. It was quite useful, iirc. >> >> Manipulate it from there. Probably selecting where there is no value >> matching ...+1+... >> >> Cheers, >> Wol >> _______________________________________________ >> U2-Users mailing list >> [email protected] >> http://listserver.u2ug.org/mailman/listinfo/u2-users >> _______________________________________________ >> U2-Users mailing list >> [email protected] >> http://listserver.u2ug.org/mailman/listinfo/u2-users >> > > _______________________________________________ > U2-Users mailing list > [email protected] > http://listserver.u2ug.org/mailman/listinfo/u2-users > > > Click > https://www.mailcontrol.com/sr/MZbqvYs5QwJvpeaetUwhCQ== > eUdxXwzJfD+jSPSM4kcQUHfMaOyCAuUs69aXEW7R1X!lw== to report this email as > spam. > -------------------------------------------------------- > > Epicor Software (UK) is a limited company registered in England & Wales. > Registration Number: 2338274. 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