The Undo logging record prefix is present in all Undo Start, Undo
Read-for-Update/Erase, Undo Write-for-Add, and Undo End log records (record
data).
The Start-of-Run (SOR) log record does not include this prefix.
Fields
- unlr_eyecatcher - 8 bytes
- A
constant 'DWWUNLR ', written in all undo log records, except the start of
run (SOR) log record.
- unlr_rec_type - char(1)
- Identifies the type of undo log record that is written. The allowable
values are shown in Table 1.
Table 1. Identifiers for undo log record
typeUndo start |
X'8F' |
Undo read-for-update |
X'81' |
Undo write-for-add |
X'83' |
Undo end |
X'87' |
- unlr_rec_flags - char(3)
- Contains a set of flags that indicate various states encountered during
undo logging.
- RESERVED - 4 bytes
- Reserved bytes.
- unlr_source_info -32 bytes
- Contains a set of subparameters that specify identifier information related
to undo logging. All undo log record types must specify a value for each of
the subparameters.
- unlr_cicsvrid - 8 bytes
- The name of the CICS® VR instance that processed this log record.
- unlr_jobid - 8 bytes
- The JES job identifier of the batch job that started this instance of CICS VR
undo logging.
- unlr_jobname - 8 bytes
- The name of the batch job that started this instance of CICS VR undo
logging.
- unlr_stepname - 8 bytes
- The name of the batch job step that started this instance of CICS VR undo
logging.
- RESERVED - 16 bytes
- Reserved bytes.