define
L0
  a.SET.4:4
L1
  a.SET.3:3
L2
  a.SET.2:2
L3
  a.SET.1:1
----
L0.0:
  000004:[a#4,SET-a#4,SET]
L1:
  000005:[a#3,SET-a#3,SET]
L2:
  000006:[a#2,SET-a#2,SET]
L3:
  000007:[a#1,SET-a#1,SET]

iter
first
----
a: (4, .)

# Only scan tables with min-seq-num < filter.

iter filter=5
first
----
a: (4, .)

iter filter=4
first
----
a: (3, .)

iter filter=3
first
----
a: (2, .)

iter filter=2
first
----
a: (1, .)

iter filter=1
first
----
.
