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# Which Problems Are Solved We need a reliable way to lock events that are being processed as part of a job queue. For example in the notification handlers. # How the Problems Are Solved Allow setting `FOR UPDATE [ NOWAIT | SKIP LOCKED ]` to the eventstore query builder using an open transaction. - NOWAIT returns an errors if the lock cannot be obtained - SKIP LOCKED only returns row which are not locked. - Default is to wait for the lock to be released. # Additional Changes - none # Additional Context - [Locking docs](https://www.postgresql.org/docs/17/sql-select.html#SQL-FOR-UPDATE-SHARE) - Related to https://github.com/zitadel/zitadel/issues/8931