Names in COBOL applications that use SQL

Any valid COBOL variable name can be used for a host variable and is subject to the following restrictions:

Do not use host variable names or external entry names that begin with 'SQL', 'RDI', or 'DSN'. These names are reserved for the database manager.

Using structures that contain FILLER may not work as expected in an SQL statement. It is recommended that all fields within a COBOL structure be named to avoid unexpected results.