If you specify select/omit statements in a join logical file,
the following rules apply:
- The fields can come from any physical file the logical file uses (specified
on the JFILE keyword).
- The fields you specify on the select/omit statements cannot be fields
defined as neither fields (N specified in position 38 for the field).
- In some circumstances, you must specify the DYNSLT keyword when you specify
select/omit statements in join logical files.