blocking option

Controls the behavior in response to locking conflicts.

If the blocking option is set to On, any transaction attempting to obtain a lock that conflicts with an existing lock held by another transaction waits until every conflicting lock is released or until the blocking_timeout is reached. If the lock is not released within blocking_timeout milliseconds, then an error is returned for the waiting transaction. If the blocking option is set to Off, the transaction that attempts to obtain a conflicting lock receives an error.

The value for the blocking connection property can be temporarily set to Off during certain operations (for example, refreshing a materialized view), which can then also cause a SQLSTATE 42W18 and SQLCODE -210. See User '%1' has the row in '%2' locked.

blocking option

Allowed values

Default

Scope

Remarks

See also