CA Log Analyzer UNDO file UPDATE statements incomplete for GENERATED ALWAYS TIMESTAMP column.
Article ID: 131327
CA-24X7 High-Availability Manager for DB2 for z/OSCA-Batch ProcessorCompile QQFCA Data Compressor for DB2 for z/OSCA Unicenter NSMCA RC/Update for DB2 for z/OSDB2 TOOLS- DATABASE MISC
Creating UNDO SQL file using CA Log Analyzer for Db2 for z/OS (PLA).
The UNDO SQL file has incomplete UPDATE statements as in the following example where the SET contains no value:
UPDATE creator.tablename SET WHERE COL1 = 12345678 AND COL2 = 123456 ;
The table DDL shows that DATA CAPTURE CHANGES in enabled.
One item in common where the SET COLUMN = VALUE is not generated is after a column was ALTER added with the following definition:
,COL3 TIMESTAMP (6) WITHOUT TIME ZONE NOT NULL GENERATED ALWAYS FOR EACH ROW ON UPDATE AS ROW CHANGE TIMESTAMP
Release: Component: PLA
Analysis shows that an UPDATE of the table replacing column(s) with the same value(s) already in the row is causing Db2 to modify the GENERATED ALWAYS ROW CHANGE TIMESTAMP column but nothing else is logged which PLA can utilize to format the UPDATE DML.
PLA is working as designed in this scenario. Updating a row with the exact column data already present in the row would not appear to be a common occurrence. Recommendation is to comment out the SQL statements with the empty SET clause to resolve.