f0:string f1:int f2:int f3:double (all can be null)
bucket count: -1
file.format: orc

Msgs:
snapshot-1
Add: Alice, 10, 1, 11.1
Add: Bob, 10, 0, 12.1
Add: Emily, 10, 0, 13.1
Add: Tony, 10, 0, 14.1
Add: Lucy, 20, 1, 14.1
NoCompact

alter table
SchemaChange.setOption("file.format", "parquet")

snapshot-2
Add: Skye, 20, 1, 19.1
Add: Bob, 10, 0, 20.1
