Re: two proposed spec changes

I don't think that we should introduce nanosecond precision types without at least supporting both timestamp and timestamptz. I'm not sure whether nanosecond time should be supported. For the primary keys, what is the use case you're trying to solve? Do your tables allow null values in primary key

Table Portability Proposal

hi Please review the approach captured here Iceberg Table Portability This is a continuation from the previous effort here - Support relative paths and multiple root locations