key0:int:0 key1:int:1 a:int:2 b:int:3 c:int:4 d:int:5 k:int:6
partition key: key0, key1
bucket count: -1

Msgs:
snapshot-1
Add(0, 1, 12, 13, 14, 15, 16)
Add(0, 1, 22, 23, 24, 25, 26)
Add(0, 1, 32, 33, 34, 35, 36)

Add(1, 1, 42, 43, 44, 45, 46)
Add(1, 1, 52, 53, 54, 55, 56)

NoCompact

schema evolution
field_2 is deleted
field_3 is renamed (b->c)
field_4 is deleted
field_5 is renamed (d->a)
field_6 order reversed
field_7 is added to the middle
field_8 is added to the last field
key0:int:0 key1:int:1 k:int:6 c:int:3 d:int:7 a:int:5 e:int:8

snapshot-2
Add(0, 1, 66, 63, 517, 65, 618)
Add(0, 1, 76, 73, 527, 75, 628)
Add(0, 1, 86, 83, 537, 85, 638)

Add(1, 1, 96, 93, 547, 95, 648)
Add(1, 1, 106, 103, 557, 105, 658)

NoCompact

Recall with schema-1, result:
0, 1, 16, 13, null, 15, null
0, 1, 26, 23, null, 25, null
0, 1, 36, 33, null, 35, null
0, 1, 66, 63, 517, 65, 618
0, 1, 76, 73, 527, 75, 628
0, 1, 86, 83, 537, 85, 638
1, 1, 46, 43, null, 45, null
1, 1, 56, 53, null, 55, null
1, 1, 96, 93, 547, 95, 648
1, 1, 106, 103, 557, 105, 658
