On Fri, Dec 7, 2018 at 7:25 PM Alexander Korotkov <a.korot...@postgrespro.ru> wrote: > The first thing, which comes to the mind is undo log. When you have > undo log, then on new subtransaction you basically memorize the > current undo log position. If subtransaction rollbacks, you have to > just play back undo log until reach memorized position. This might be > an option for zheap. But actually, I didn't inspect zheap code to > understand how far we're from this.
Yeah, zheap works this way. -- Robert Haas EnterpriseDB: http://www.enterprisedb.com The Enterprise PostgreSQL Company
