echo
----
db0.Put(ctx, tk(1), sv(1)) // @0.000000001,0 <nil>
db0.Get(ctx, tk(1)) // @0.000000002,0 (v1, <nil>)
db0.Del(ctx, tk(1) /* @s2 */) // @0.000000003,0 <nil>
/Table/100/"0000000000000001"/0.000000001,0 @ s1 v1
/Table/100/"0000000000000001"/0.000000003,0 @ s2 <nil>
