Re: [UV] Ever wondered how something works...

[Glenn Herbert]

The default behavior will be that upon completion of the command, ie 
incorrect syntax, correct working, etc, any active SELECT list will be 
cleared.  The 'K' entry in field 4 overrides that so that when the command 
exits any active SELECT will NOT be cleared.  This behavior is strictly 
flavor dependant and can be modified if you don't like it (though the next 
ACCOUNT.UPDATE will reset it).

Secondly, the 'S' option is usually used to pass a select list into an 
external executable, for example, things in the $UVHOME/bin directory.  So, 
for instance, FILE.STAT is actually $UVHOME/bin/file.stat.  From TCL you 
can use FILE.STAT with a select list;

SELECTFL
FILE.STAT
and this will dump out the info for all the files in the select list.  What 
actually happens is there is a bit of substitution.   The SELECTFL will 
generate a temp file with all the file names in it, i.e. 
UVTEMP/select01928aa.   The command built to run would then be:

$UVHOME/bin/file.stat -S /tmp/select01928aa (assuming UVTEMP == /tmp)

This is how we originally designed active select lists to be used with 
externals.  Back to the main point, once file.stat completes (or bombs out 
or whatever) the command executor will shutdown (or keep open) the SELECT 
list based upon the 'K' in field 4.

At 04:04 AM 03/04/2004, you wrote:
uv System Administration manual  chapter Adding Commands to the VOC File
says for  'V' entries  that field 4
K   -  Keep select list
S   -  Uses select list
Of course it doesn't bother with tiny details like  wich behavioiur is default
or  what effect these settings have when the program isn't 
found.  ..  hint, hint  IBM manual writers  ...  :^)

From experience (including from this thread) I'd say that the list is not 
kept unless there is a K.

-- mats

Andrew Gissing wrote:

so I have to think the list will still be active after the WHO is
completed.
Not so. I discovered to my own use that simply using "LIST", without file
name, will clear the selectlist.
And in any event, proof of who below:

<<< T C L>>>


SELECT CUST

3117 record(s) selected to SELECT list #0.


WHO

120 mm From andrew



andrew gissing


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