|
Function
|
Purpose
|
Valid Region Types
|
Notes
|
|---|---|---|---|
|
CHKP
|
create the synchronization point, recovery
|
all IMS DATA step interface region types
|
OS/VS option not supported.
In transaction-processing BMPs, next call must be GU using I/O PCB.
|
|
CHNG
|
change destination for
messages
|
IMS/ESA BMP regions
|
sets the destination for a modifiable TP PCB
|
|
CMD
|
issue IMS/ESA commands from a program
|
IMS/ESA BMP regions
|
when CC status returned,
must next issue GU to retrieve response
|
|
DEQ
|
release a class of segments enqueued with the Q command code
|
IMS/ESA BMP regions
|
specify class (A-J)
of segments to dequeue
|
|
FLD
|
access fields in MSDBs
|
IMS/ESA BMP regions
|
Fast Path Facility only
|
|
GCMD
|
retrieve additional
response segments to a command if more than one
|
IMS/ESA BMP regions
|
functions as a GN to the queue after first response segment retrieved with GU
|
|
GN
|
retrieve additional segments of a message with more than one segment
|
IMS/ESA BMP regions
|
uses I/O PCB
|
|
GU
|
retrieve the first segment of a message
|
IMS/ESA BMP regions
|
uses I/O PCB
|
|
ISRT
|
format and send message segment to the queue
|
IMS/ESA BMP regions
|
uses I/O or TP PCB
|
|
LOG
|
insert a record to the DL/I system log
|
z/OS DL/I regions
|
uses I/O PCB
|
|
POS
|
return position information
from DEDBs
|
IMS/ESA BMP regions
|
Fast Path Facility only
|
|
PURG
|
terminate the current message being inserted; insert the first segment of the next
message
|
IMS/ESA BMP regions
|
uses TP PCB
|
|
ROLB
|
back out database updates since last sync point
|
IMS/ESA BMP regions and batch DL/I regions in IMS/ESA Release 3
|
in BMP regions, also backs out messages inserted to the queue since the last synchronization
point. Next call must be GU using I/O PCB if ROLB requested return of previous message.
|
|
ROLL
|
back out database updates since last sync point, and abend
|
IMS/ESA BMP regions, batch DL/I regions in IMS/ESA
Release 3, and CICS/VS shared
DL/I regions
|
in BMP regions also backs out messages inserted to the queue since the last synchronization
point
|