STD.File.FileExists with nothor()

[rati]

I am trying to use nothor() for a simple project() .


Here is my code :
----------------------SNIP---------------------------------------------------
global_newSuperfileLink := global(newSuperfileLink);

newSuperfileLinkCheckLogical := nothor(PROJECT(global_newSuperfileLink,
TRANSFORM(superfile_logicalfile_flat_layout,
SELF.LogicalFileExists := STD.File.FileExists(left.LogicalFile),
SELF := left ))) : INDEPENDENT;

Then I use newSuperfileLinkCheckLogical for rest of the processing …..
----------------------SNIP---------------------------------------------------


This gives me an error : Error: INTERNAL: Expected a parent/container context. Likely to be caused by executing something invalid inside a NOTHOR. (0, 0), 4818,

I just want to check and record if those files actually exist.

[rtaylor]

rati,

There is no inherent problem with using STD.File.FileExists inside a NOTHOR. I just tested this code on one of our training clusters and it ran fine:

Code: Select all

import Std;
LogicalFile := '~CLASS::RT::Intro::Persons';
NOTHOR(STD.File.FileExists(LogicalFile));

So your problem is not with that function per se. This code also works correctly:

Code: Select all

import Std;
ds := DATASET([{'~CLASS::RT::Intro::Persons'},
               {'~CLASS::RT::Intro::Accounts'},
               {'~CLASS::RT::Intro::NoFileForThis'}
              ],{STRING LogicalFile});

nothor(PROJECT(ds,
                TRANSFORM({BOOLEAN LogicalFileExists,STRING LogicalFile},
                          SELF.LogicalFileExists := STD.File.FileExists(left.LogicalFile),
                          SELF := left ))) : INDEPENDENT;


Perhaps it's an interaction with your use of the GLOBAL function?

HTH,

Richard

[rati]

Adding few to global() helped.

Code: Select all

global_newSuperfileLink := global(newSuperfileLink,few);