So your constraints are only CLIST and REXX and no compiled programs? Well, duplicates are allowed in concatenations.
So you might be able to skip the lookup. There are ways you can remember that you already did this in a session, such as allocating IDIDIT and doing an EXECIO against it to determine if it is allocated. On Sat, 30 Dec 2023 23:35:11 +0000 Seymour J Metz <sme...@gmu.edu> wrote: :>I want to set up an environment that supports personal tools. I'd like to allow the users to create VB libraries, but if there is no way to retain ALTLIB and LIBDEF across START (ISPSTRT) then I'll stick to FB and reconcatenate. :> :>Performance is not an issue because the code would only run immediately after logon. :> :>-- :>Shmuel (Seymour J.) Metz :>http://mason.gmu.edu/~smetz3 :>??? ?????????? ??? :>?????? ??????????? ???? ?????????? :> :>________________________________________ :>From: IBM Mainframe Discussion List <IBM-MAIN@LISTSERV.UA.EDU> on behalf of Binyamin Dissen <bdis...@dissensoftware.com> :>Sent: Saturday, December 30, 2023 12:33 PM :>To: IBM-MAIN@LISTSERV.UA.EDU :>Subject: Re: Checking status of multiple datasets in CLIST and REXX :> :>On Fri, 29 Dec 2023 14:47:29 +0000 Seymour J Metz <sme...@gmu.edu> wrote: :> :>:>I need to check whether any of a list of datasets exists and whether any of a list of ddnames is allocated. I'd rather not trap and parse the output of LISTALC and LISTCAT, and I'd rather not call LISTDSI for each one. Is there a simple way to do that in REXX, or would it be better to write a small service routine in assembler? :> :>:>I don't have a requirement to handle XTIOT. :> :>The elephant in the room - why? :> :>Perhaps there is a better way to do what you want. :> :>As you are worried about performance, it appears to be something that will :>need to run quite often. How will you use this information? -- Binyamin Dissen <bdis...@dissensoftware.com> http://www.dissensoftware.com Director, Dissen Software, Bar & Grill - Israel ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN
