Support for UInt128, UInt256 (and others)

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Hi, I'm trying to read a Number field from an Oracle database that contains an IPv6 address that was converted to its Decimal representation. Support for UInt128 (and 256) are missing from odbc-driver so I tried to create my field in my ClickHouse table as Decimal256(0) but that didn't work.
I also tried to making this field a String and try to convert it as part of my query but that didn't work either, the number was getting truncated.
Would an array of UInt64[2] work?

Can you think of a clever way to read that field in, short of implementing support for UInt128? Thanks!