Arrow backed tables

[adsharma]

I'm looking to generalize the Parquet backed node/rel tables as follows:

                Table
                  |
         ┌────────┴────────┐
    NodeTable         RelTable
         |                 |
    ColumnNodeTableBase  ColumnarRelTableBase
         |                 |
    ┌────┴─────┐      ┌────┴─────┐
Parquet    Arrow  Parquet    Arrow
Node       Node    Rel        Rel
Table      Table   Table      Table

Let me know if you think this is a bad idea.