[ADBA] Supporting BigInteger

[Philippe Marschall]

Hello

One of the things that bothers me in JDBC is that there is no support 
for BigInteger. All arbitrary precision numbers, even if they have no 
decimal places, have to be expressed as BigDecimal. This is annoying 
because there is no way to communicate with the type that no decimal 
places are allowed or present.

Currently ResultMap#get doesn't specify exactly which types have to be 
supported so I assume it's the same as with ResulSet#getObject.

Cheers
Philippe