A little confused about partial rollbacks in ARIES. When would you need this?
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Subtransactions and statement-level rollback...also important for read committed concurrent update conflicts in some systems.
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@geoghegan86 But if you have a serializable system, you should never need this, correct?
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I think so...Postgres has no undo. Certainly, RC statement rollback thing is basically RC's alternative to serialization failure.
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