Sergey,

> Can you explain (especially for me ) how i have to specify TPB mapping
> in JDBC URL, because i haven't found it.

jdbc:firebirdsql:localhost/3050:/my/db.gdb?TRANSACTION_READ_COMMITTED=isc_tpb_read_committed,isc_tpb_rec_version,isc_tpb_write,
isc_tpb_wait&TRANSACTION_REPEATABLE_READ=isc_tpb_concurrency,isc_tpb_write,isc_tpb_wait

So, general idea is simple: you specify connection properties with
name "TRANSACTION_READ_COMMITTED", "TRANSACTION_REPEATABLE_READ" or
"TRANSACTION_SERIALIZABLE" and value of comma-separated list of TPB
params.

Best regards,
Roman