In the process of data replication using Oracle GoldenGate the first step is assuring that all the needed information has been written to the database redo log. By default the database does not write all the information that might be needed by the replication process. That’s why some additional supplemental logging is needed.
According to the documentation supplemental logging is being added by the ADD TRANDATA command. A very good research about this subject has been made by Julian Dyke in the article about adding supplemental logging. But what does the GoldenGate command actually do and which options should be used? (more…)