beginExclusive method
override
Returns a new QueryExecutor that, when first opened, takes an exclusive
lock over this
executor and prevents queries from running until it is
closed.
The difference between this and beginTransaction is that this does not start a database transaction. The QueryExecutor returned by beginExclusive can be used to start a transaction with beginTransaction.
Implementation
@override
QueryExecutor beginExclusive() => _delegate.beginExclusive();