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07-19-2006 07:46 AM
07-19-2006 07:46 AM
What does /ALL qualifier do for SHOW LOGICAL
Not important, but curiosity makes me ask: What purpose does the SHOW LOGICAL /ALL qualifier have? The documentation states:
/ALL (default)
Indicates that all logical names in the specified logical name tables are to be displayed. If you do not enter the /PROCESS, /JOB, /GROUP, /SYSTEM, or /TABLE qualifier, all logical names in the tables specified by the logical name LNM$DCL_LOGICAL are displayed.
But /ALL is not the default in SHOW.CLD and I can see no differences in using /ALL or /NOALL in any SHOW LOGICAL command I tried.
The SHOW LOGICAL parameter determines what logical names are displayed, and it defaults to *. I'm guessing /ALL is ignored and is just a left-over documentation relic from before SHOW LOGICAL supported wildcards.
And on that subject wouldn't it be nice if F$TRNLNM/SYS$TRNLNM supported wildcards?
/ALL (default)
Indicates that all logical names in the specified logical name tables are to be displayed. If you do not enter the /PROCESS, /JOB, /GROUP, /SYSTEM, or /TABLE qualifier, all logical names in the tables specified by the logical name LNM$DCL_LOGICAL are displayed.
But /ALL is not the default in SHOW.CLD and I can see no differences in using /ALL or /NOALL in any SHOW LOGICAL command I tried.
The SHOW LOGICAL parameter determines what logical names are displayed, and it defaults to *. I'm guessing /ALL is ignored and is just a left-over documentation relic from before SHOW LOGICAL supported wildcards.
And on that subject wouldn't it be nice if F$TRNLNM/SYS$TRNLNM supported wildcards?
I have one, but it's personal.
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07-19-2006 10:54 AM
07-19-2006 10:54 AM
Re: What does /ALL qualifier do for SHOW LOGICAL
Jess,
I suspect you're correct. /ALL is one of the common qualifier set for SHOW LOGICAL, and DEASSIGN. I can't see anything in the SHOW LOGICAL sources where it makes a difference.
re: F$TRNLNM wildcards
yes, but it would require a radical change in interface. At the moment one call produces 0 or 1 result. Wild cards would potentially generate multiple results, needing a more complex structure to returned a list, or an F$SEARCH type loop, with all the issues involving stored contexts, multiple search threads, tear down, etc...
It's no longer enough for it to be "nice". You need to show engineering & management enough ROI to have a wish granted.
I suspect you're correct. /ALL is one of the common qualifier set for SHOW LOGICAL, and DEASSIGN. I can't see anything in the SHOW LOGICAL sources where it makes a difference.
re: F$TRNLNM wildcards
yes, but it would require a radical change in interface. At the moment one call produces 0 or 1 result. Wild cards would potentially generate multiple results, needing a more complex structure to returned a list, or an F$SEARCH type loop, with all the issues involving stored contexts, multiple search threads, tear down, etc...
It's no longer enough for it to be "nice". You need to show engineering & management enough ROI to have a wish granted.
A crucible of informative mistakes
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