Hello, may be you can find more informations regarding WAL concepts in Write Ahead Logging — WAL http://www.interdb.jp/pg/pgsql09.html It seems very complicated to change WAL format ... Maybe there are other solutions to answer your need, I found many interesting solutions in postgres archives searching with words "flashback", "timetravel", "tablelog", ... My prefered is "AS OF queries" https://www.postgresql.org/message-id/flat/78aadf6b-86d4-21b9-9c2a-51f1efb8a499%40postgrespro.ru and more specificaly syntax VERSIONS BETWEEN SYSTEM TIME ... AND ... that would permit to get history of modifications for some rows and help fixing current data Regards PAscal Regards PAscal -- Sent from: http://www.postgresql-archive.org/PostgreSQL-hackers-f1928748.html
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