The SET CURRENT ISOLATION LEVEL statement allows a user to change the isolation level for the user's connection. Valid levels are SERIALIZABLE, REPEATABLE READ, READ COMMITTED, and READ UNCOMMITTED.
Issuing this command commits the current transaction, which is consistent with the java.sql.Connection.setTransactionLevel method.
For information about isolation levels, see "Locking, Concurrency, and Isolation" in the Derby Developer's Guide.
SET [ CURRENT ] ISOLATION [ = ] { UR | DIRTY READ | READ UNCOMMITTED CS | READ COMMITTED | CURSOR STABILITY RS | RR | REPEATABLE READ | SERIALIZABLE RESET }
set isolation serializable;