echo
----
db0.Put(ctx, tk(1), sv(1)) // @0.000000001,0 <nil>
db0.Put(ctx, tk(2), sv(2)) // @0.000000002,0 <nil>
db0.Del(ctx, tk(1) /* @s3 */) // @0.000000003,0 <nil>
db0.Del(ctx, tk(2) /* @s4 */) // @0.000000004,0 <nil>
{
  b := &kv.Batch{}
  b.Get(tk(1)) // (<nil>, <nil>)
  b.Get(tk(2)) // (v2, <nil>)
  b.Get(tk(3)) // (<nil>, <nil>)
  db0.Run(ctx, b) // @0.000000003,0 <nil>
}
/Table/100/"0000000000000001"/0.000000001,0 @ s1 v1
/Table/100/"0000000000000002"/0.000000002,0 @ s2 v2
/Table/100/"0000000000000001"/0.000000003,0 @ s3 <nil>
/Table/100/"0000000000000002"/0.000000004,0 @ s4 <nil>
