You can use the Override with Database file (OVRDBF) command to
replace the database file named in a CL program or to change certain parameters
of the existing database file.
It is not mandatory to use OVRDBF(*Yes) before OPNQRYF. You can still
use OPNQRYF without OVRDBF.But here the pupose of the OPNQRYF won't be solved.
Opnqryf creates its own Open data path and to share the same
data path in a program we use ovrdbf share(*yes), if we do not use ovrdbf, then
program will have its own ODP, so it will read the file from beginning on which
query has been run. So, OPNQRYF selected records will have no importance.
So, we need to use CPYFRMQRYF command and put the selected
records in to runtime file and use that file to read in program.
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