[Tut] fpos and __fileposition__ are different

[NSD]

Hi,

I worked through the Tutorial 'till "Index the Data", now i recognized, that fpos != __fileposition__ ? Are they not the same?



Dataset_PrepareIndex_Zip

Code: Select all

Import Tutorial;

EXPORT Dataset_PrepareIndex_Zip :=
      DATASET   ('~tutorial::myname::upperperson',
                  {Tutorial.Layout_People, UNSIGNED8 fpos {virtual(fileposition)}},
                  THOR);

Process_AllPeopleToUpper

Code: Select all

IMPORT Tutorial, STD;      //Std = Standard Library

   Tutorial.Layout_People AllPeopleToUpper(Tutorial.Layout_People rawInput) :=
      TRANSFORM
         SELF.FirstName := STD.Str.ToUpperCase(rawInput.FirstName);
         SELF.LastName := STD.Str.ToUpperCase(rawInput.LastName);
         SELF.MiddleName := STD.Str.ToUpperCase(rawInput.MiddleName);
         SELF.Zip := rawInput.Zip;
         SELF.Street := rawInput.Street;
         SELF.City := rawInput.City;
         SELF.State := rawInput.State;
      END;
      
OrigDataset := Tutorial.Dataset_OriginalPerson;
NewDataset := PROJECT(OrigDataset,AllPeopleToUpper(RIGHT));
OUTPUT(NewDataset,,'~tutorial::myname::UpperPerson',OVERWRITE);

[NSD]

Ive fixed this:

In a previous tutorial, there was a Record Length of 155 of the OriginalPerson File, now it is 124. My question is now: how do i know the exact Record Length of a File?

[rtaylor]

NSD,

You're confusing the "Persons" file from our Introduction to ECL online eLearning course (155-byte records) with the "OriginalPerson" file from the Data Tutorial downloadable PDF (which has 124-byte records).

how do i know the exact Record Length of a File?

The answer to this is the same as in any other language/development platform -- you either are given that information from the data provider, or you need to empirically determine it for yourself.

In the case of our ECL teaching materials, we will always give you enough information up front to be able to work with the file.

HTH,

Richard

[NSD]

thank you. ill work through more tutorials

in my case i will only work with CSV's. as i remeber right, i hadn't set up a record length.

for anybody, who's interested how it works:

http://www.unix.com/unix-for-dummies-qu ... -file.html