The DBRED command reads an LREC From an opened Subfile , The pointer to the LREC is loaded in the specified register coded using the REG= parameter also known as the current LREC , If LREC is not found till end of Subfile READ sets a LREC not found indicator in SW00RTN byte , After reading the LREC Fields in the LREC Can be accessed using DSECT Labels , Subsequent DBRED will start reading from Current LREC.
Mandatory Parameters for DBRED
REF= | FILE= (or both)
Optional Parameters for DBRED
REG=
ALG= | ORD = | FADDR =
UP|DOWN|NOORG
KEYn(R=,S=|D=|M=,L=,C=.UP|DOWN|NOORG) (n=1..6)
LRECNBR
NOKEY
ERROR | ERRORA