Frank Swarbrick at IBM Mainframe Discussion List <IBM-MAIN@bama.ua.edu> wrote on 04/19/2012 10:22:56 AM: > I know of the NULLOUT and NULLOFL options to specify return code > setting if there are no records to be written to the output file. > I'm wondering if there is any option I can specify so that the > SORTOUT file will not even be opened if there are no records to be > written to it. Basically, I want to leave the "old" records that > were in SORTOUT alone if there is nothing new to go in to it for this run. > > At this point the best thing I can think of is to run SORT twice; > the first time copying one record to a dummy file with NULLOUT=RC4 > set. Then skipping step 2, the actual copy into the real SORTOUT, > if the RC from step 1 is not 0. > > If there is a program other than SORT (IDCAMS?) that I can use to > accomplish this, that's fine as well. No actual sorting is being > done; just a straight copy.
Frank, You could use a DFSORT ICETOOL job with COUNT and COPY like this: //S1 EXEC PGM=ICETOOL //TOOLMSG DD SYSOUT=* //DFSMSG DD SYSOUT=* //IN DD DSN=... input file //OUT DD DSN=... output file //TOOLIN DD * MODE STOP COUNT FROM(IN) EMPTY RC12 COPY FROM(IN) TO(OUT) /* If IN is emtpy, the COUNT operator will set RC=12 and the COPY operator will NOT be executed so OUT will not be opened. The step will give back cc=12. COUNT does not require an output data set. If IN is not empty, the COUNT operator will set RC=0 and the COPY operator will be executed so OUT will be opened and IN will be copied to it. The step will give back cc=0 Note that MODE STOP is the default so you don't have to specify it, but I put it in for doc purposes. Frank Yaeger - DFSORT Development Team (IBM) - yae...@us.ibm.com Specialties: JOINKEYS, FINDREP, WHEN=GROUP, ICETOOL, Symbols, Migration => DFSORT/MVS is on the Web at http://www.ibm.com/storage/dfsort ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@bama.ua.edu with the message: INFO IBM-MAIN
