Re: SQL statements for physical and logical files

Does the file have to have been originally created with SQL instead of DDS
for this kind of information to even be kept anywhere or is it stored
somewhere for all files?

Regarding the question of "SQL instead of DDS", I've run across a number of
people who perpetuate the myth that there are 2 distinct database
management systems under IBM i, and that the database objects that are
created from DDS are materially different from the ones created by DDL.

For database objects created from DDS, some refer to that as an ISAM
database, while database objects created from DDL are part of a relational
database management system. As I say, that's a material misperception, or
misrepresentation.

The physical files (aka physical database objects) created via DDS are
essentially identical to the ones created by DDL. That becomes quite
apparent via output from the DSPFD command, system APIs, SQL catalogs, and
object dumps. And the database objects created by DDS and DDL pertain to
the same database management system.

Regarding RLA, which is similar to access methods under ISAM, the IBM i SQL
Query Engine (aka SQE) uses that under the covers.