Trigger are useful to find programs that update files incorrectly. When this happens, I create a trigger that will create a sequential file with the content of SYSTEM(9001) on Universe in order to identify the chain of calling programs.
________________________________ From: "Hona, David" <[email protected]> To: U2 Users List <[email protected]> Sent: Thursday, August 1, 2013 5:32 AM Subject: Re: [U2] [UV] Do you avoid TRIGGERS because of the difficulty using DEBUG or RAID with them? Was: Universe Triggers Now that (from UV10.1) Index-based triggers are officially supported, can these replace your SQL-based triggers? These have less functionality and less overhead, but that's the price you have to pay.... Can't say I had a chance to try it for myself...yet...! -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Charles Stevenson Sent: Saturday, 27 July 2013 5:32 AM To: U2 Users List Subject: [U2] [UV] Do you avoid TRIGGERS because of the difficulty using DEBUG or RAID with them? Was: Universe Triggers How many people avoid using triggers BECAUSE of the virtual impossibility of using RAID with Triggers? On 7/26/2013 12:33 PM, Phil Walker wrote: > I won't be holding my breath Charles ;-) > > -----Original Message----- > From: [email protected] > [mailto:[email protected]] On Behalf Of Charles > Stevenson > Sent: Friday, 26 July 2013 9:22 p.m. > To: U2 Users List > Subject: Re: [U2] Universe Triggers > > re. triggers & Raid, I could not agree with Phil more. Well said. > Come on, Rocket! > > On 7/19/2013 1:32 AM, Phil Walker wrote: >> Ken, >> >> I am glad you raised the issue about debugging a program with a file which >> has a trigger attached. I have been on to UV (Vmark/Ardent/IBM/Rocket for >> ages about fixing this pushing for the ability to be able to step into the >> trigger code, but at a VERY MINIMUM being able to debug the program and >> perform the write on the file, and in effect step over the trigger >> subroutine and carry on debugging. The issue is the trigger subroutine >> cannot support input, so what UV have done is basically say you are using >> the debugger so you are inputting debug commands so you will abort. They >> need to turn this restriction off for debugging so that either of the above >> two scenarios is supported. >> >> In a Microsoft world I can debug anything through the connected world of >> web/databases etc...... >> >> Have had no feedback from UV >> >> -----Original Message----- >> From: [email protected] >> [mailto:[email protected]] On Behalf Of Ken Ford >> Sent: Friday, 19 July 2013 9:48 a.m. >> To: [email protected] >> Subject: Re: [U2] Universe Triggers >> >> Dan, >> In addition to the other responses you have received, I suggest the >> following: >> 1. Have one master file trigger subroutine (globally catalogued) that calls >> subroutines (locally catalogued) tailored to individual files. This means >> you don't have to stop and restart Universe when a new trigger is required >> or a change to an existing one. If the master subroutine changes, you do >> have to restart Universe. >> 2. Use a control record that records the subroutine name and state of the >> trigger for each file having a trigger. >> 3. Use a program to change the state of a trigger, using the control records >> in 2 above. >> 4. Make sure all background processes that have a file with a trigger open >> are logged out when recompiling the subroutine for that file trigger. >> 5. Remember that you can't do anything to a file with an active trigger >> whilst in the RAID debugger (it will crash). Rather, if you are testing a >> file trigger subroutine, drop the trigger and use a trigger testing program >> that calls the subroutine after taking a copy of the record being changed, >> pausing whilst you change it in another session, and then resuming, calling >> the subroutine. >> >> If you would like samples of any of the software mentioned above, let me >> know, and I can send them to you. >> >> Regards, >> Ken Ford >> Universe Software Developer >> t 07 3013 8605 | f 07 3002 8400 >> e [email protected] | w firstmac.com.au > _______________________________________________ U2-Users mailing list [email protected] http://listserver.u2ug.org/mailman/listinfo/u2-users ************** IMPORTANT MESSAGE ***************************** This e-mail message is intended only for the addressee(s) and contains information which may be confidential. 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