RE: Documentation should state what happens, when a commit fails

Wow, great improvement, thanks!

The "tutorial-transactions" opens a new question that might be useful to know: when a transaction enters the aborted state at an early point in time (as has now become clear), does this mean it will also relinquish any locks and predicate locks early, or will it still hold onto those until explicitly rolled back by command?

_Mark

On Wednesday, May 28, 2025, Laurenz Albe <laurenz.albe@cybertec.at> wrote:

On Wed, 2025-05-28 at 08:08 +0000, PG Doc comments form wrote:
> The following documentation comment has been logged on the website:
>
> Page: https://www.postgresql.org/docs/17/sql-commit.html
> Description:
>
> Deferrable constraints, deadlocks and possibly other deferred or lazily
> evaluated rules are checked upon commit.
> What happens if they are not met and the commit statement fails? Does the
> transaction then implicitly rollback? Or do I need an explicit rollback?

I think it would be good to mention that a failed COMMIT automatically
performs a ROLLBACK.  Do you want to suggest a patch?

Feel free to review mine for this topic and suggest additions.

 https://commitfest.postgresql.org/patch/5546/

David J.