I'm sorry - I didn't read Gilbert's example closely enough. One possibility would be to have the program see the last valuable of a given variable before the step was executed, sinces it is uncommon to set a variable more than once in the scope of a given step.
Kirk Wolf Dovetailed Technologies http://dovetail.com On Mon, Sep 21, 2009 at 11:03 AM, Kirk Wolf <k...@dovetail.com> wrote: > Gilbert, > > My suggestion for having JCL/SET variables in a ASASYMBM "user" table has > to do with what a program would see when it runs in the initiator. Of > course, each step would see different variables/values. > > Kirk Wolf > Dovetailed Technologies > http://dovetail.com > > On Sat, Sep 19, 2009 at 2:06 AM, Gilbert Saint-Flour <usenet5...@yahoo.com > > wrote: > >> Hardee, Charles H wrote: >> >> > I agree with Paul, why do you call this a problem. >> > >> > As Paul indicates, the substituted values would be those in effect when >> > the step (EXEC as Paul said) is reached. >> > If you have a SET for a variable name prior to step 1 and then a SET for >> > the same variable name prior to step 2, isn't the intention to have >> > different values available to the step? >> >> What Kirk Wolf calls "ASASYMB-style symbol table" has a simple format >> because >> each variable it contains has a single (and stable) value. The structure >> of >> a "JCL variable symbols" table defined when the job's JCL is analysed >> would >> be more complex because a variable can by set several times in a job, even >> in >> a job step. Example: >> >> // SET VAR=AAAAAAAA >> //STEP1 EXEC PGM=MYPROG,PARM=&VAR >> // SET VAR=SYS1.MACLIB >> //DD1 DD DSN=&VAR,DISP=SHR >> // SET VAR=SYS1.MODGEN >> //DD2 DD DSN=&VAR,DISP=SHR >> >> When MYPROG looks for the value of &VAR, what does it find ? AAAAAAAA, >> SYS1.MACLIB, or SYS1.MODGEN ? All three ? No, this definitely can't be >> as >> simple as ASASYMB. >> >> The "System static symbols" table is displayed in the SYMBOLS section of >> SHOWMVS and SHOWzOS. The code was contributed to R618 in 1996 by DL. >> >> -- >> Gilbert Saint-Flour >> GSF Software >> http://gsf-soft.com >> >> >> > What I would like to see is something similar to the "environment" in >> > the PC world. One would SET various variables to required values and >> > then, programmatically, access the "environment" and retrieve a >> > variable's value. That is, in effect, what a SYSIN DD would/could be >> > used for, but, unfortunately, symbolics can't be used in SYSIN, or more >> > generically, DD *, input. >> > >> > Chuck >> > >> > -----Original Message----- >> > From: IBM Mainframe Discussion List [mailto:ibm-m...@bama.ua.edu] On >> > Behalf Of Paul Gilmartin >> > Sent: Friday, September 18, 2009 10:41 AM >> > To: IBM-MAIN@bama.ua.edu >> > Subject: Re: Reading DD card information >> > >> > On Fri, 18 Sep 2009 16:37:19 +0200, Gilbert Saint-Flour wrote: >> > >> >>Frank Swarbrick wrote: >> >> >> >>On 9/17/2009 at 2:13 PM, Kirk Wolf wrote: >> >>>> Not to drudge up old threads, but wouldn't it be nice if JCL PROC >> >>>> and SET variables were not thrown away by the converter/interpreter >> >>>> and instead placed in an ASASYMB-style symbol table by the >> initiator? >> >>>> This would be useful in so many ways.... >> >> >> >>That could be more complicated that the system-wide symbol table. >> >>One problem is probably that a variable can be set to several different >> >> values in a given job. >> >> >> > I would expect that the values passed to each job step would be the >> > values of the JCL symbols in effect at the point of the EXEC statement. >> > Why do you call this a problem? This parallels the behavior of >> > symbolic substitution in PARM, DD statements, etc. >> > >> > -- gil >> >> ---------------------------------------------------------------------- >> For IBM-MAIN subscribe / signoff / archive access instructions, >> send email to lists...@bama.ua.edu with the message: GET IBM-MAIN INFO >> Search the archives at http://bama.ua.edu/archives/ibm-main.html >> > > ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@bama.ua.edu with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
