READ

For sequential access, makes available the next or previous logical record from a file. For random access, makes available a specified record from a disk file.

Opcode	Operation	File Types
8D	READ(sequential) WITH NO LOCK	L S R I
D8	READ (sequential) WITH LOCK	L S R I
D9	READ (sequential) WITH KEPT LOCK	L S R I
F5	READ (sequential)	L S R I
8C	READ PREVIOUS WITH NO LOCK	R I
DE	READ PREVIOUS WITH LOCK	R I
DF	READ PREVIOUS WITH KEPT LOCK	R I
F9	READ PREVIOUS	R I
8E	READ (random) WITH NO LOCK	R I
DA	READ (random) WITH LOCK	R I
DB	READ (random) WITH KEPT LOCK	R I
F6	READ (random)	R I
8F	READ (direct) WITH NO LOCK	L S R I
D6	READ (direct) WITH LOCK	L S R I
D7	READ (direct) WITH KEPT LOCK	L S R I
C9	READ (direct)	L S R I
F1	READ (position)	L S R I

Input Fields

fcd-relative-key	Relative record number (R) if READ random or direct
fcd-key-id	Key identifier (I)
fcd-record-address	Pointer to the record area

Output Fields

fcd-file status	File status
fcd-current-rec-len	Current record length
fcd-reladdr-offset or fcd-reladdr-big	Relative byte address