Data Management Operations and ILE RPG I/O Operations

Data management is the part of the operating system that controls the storing and accessing of data by an application program. Table 1 shows the data management operations provided by the IBM i and their corresponding ILE RPG operation. It also shows which operations are allowed for which ILE RPG device type.

Table 1. Data Management Operations and the Corresponding RPG I/O Operation

Data Management Operation	ILE RPG I/O Operation
Open	OPEN
Read by relative record number	READ, CHAIN
Read by key	READ, READE, CHAIN, primary and secondary file
Read sequential	READ
Read previous	READP, READPE
Read next	READ, READE
Read invited device	READ
Write-Read	EXFMT
Write by relative record number	WRITE
Write by key	WRITE, EXCEPT, primary and secondary file
Write sequential	WRITE, EXCEPT
Force end of data	FEOD
Update by relative record number	UPDATE, primary and secondary file
Update by key	UPDATE, primary and secondary file
Delete by relative record number	DELETE, primary and secondary file
Delete by key	DELETE, primary and secondary file
Acquire	ACQ
Release	REL
Commit	COMMIT
Rollback	ROLBK
Close	CLOSE, LR RETURN