Isolation and Lock Levels Supported
DB2 supports isolation level 0 (read uncommitted), isolation level 1 (read committed), isolation level 2 (repeatable read), isolation level 3 (serializable), and, on DB2 for iSeries only, isolation level 4 (none).
Refer to "Locking and Isolation Levels" in the DataDirect Connect for ODBC and Connect XE for ODBC Reference for details.