Local transactions
For local transactions, the default value of the Autocommit isolation level is read-committed for databases created with logging and read-uncommitted for databases created without logging.
The consumer can change the default to read-uncommitted
or serializable by setting the DBPROP_SESS_AUTOCOMMITISOLEVEL property.
Important: When the isolation level is set to read-uncommitted
for a database that has logging, data can be read from but not written
to the database.