Date Format 9999-12-31-00.00.00.000000

Hi,

because of a migration from DB2 we have a lot of timestamps like

9999-12-31-00.00.00.000000

What would be the best way to handle this in Postgres also related
to overhead and performance (index usage?).

Or is 

TO_TIMESTAMP('9999-12-31-00.00.00.000000', 'YYYY-MM-DD-HH24.MI.SS.US')

the only way? And isn't it possible to define this like NLS parameters in Oracle
system wide?

Thanks

Dirk