Use the Compare Journal Images (CMPJRNIMG) command to compare and list the differences between the before-image of a record and the after-image of that record, or the after-image of a record with the previous after-image of that record.
You can only use the CMPJRNIMG command for journaled
physical database files. You cannot use the CMPJRNIMG command for journal
entries that have minimized entry-specific data. If you specified the minimized
entry-specific data (MINENTDTA(*FILE) or MINENTDTA(*FLDBDY) parameter on the
Create Journal (CRTJRN) or Change Journal (CHGJRN) commands, the journal entries
might have minimized entry-specific data, preventing you from being able to
compare journaled images.
If the journaled files have null-capable fields, the null value indicators corresponding to the fields in the before-image of the record are compared with the null value indicators corresponding to the fields in the after-image of the record. A field-by-field basis compare does this.
The printed output from the CMPJRNIMG command shows the before-images and after-images of a record followed by a line that indicates (with asterisks) the specific change in the record on a character-by-character basis. If you compare the after-images, the output shows the previous after-image of the record and the current after-image of the record, followed by a line indicating the changes.
If you use this command to compare journal images for a file that contains any fields of data type BLOB (binary large object), CLOB (character large object), or DBCLOB (double-byte character large object), these fields are not included in the comparison. All other fields in the file are compared.