id	[]	[]	[]
t	['a','s']	['UInt64','String']	['Sparse','Default']
(0,'a')
(0,'aa')
(0,'aaa')
(0,'aaaa')
(0,'aaaaa')
(20,'a')
(40,'a')
(60,'a')
(80,'a')
(100,'a')
(20,'a')
(40,'a')
(60,'a')
(80,'a')
(100,'a')
0
0
0
0
0
20
40
60
80
100
20
40
60
80
100
a
aa
aaa
aaaa
aaaaa
a
a
a
a
a
id	[]	[]	[]
t	['a','b','b.u','b.s']	['UInt64','Tuple(u UInt32, s String)','UInt32','String']	['Sparse','Default','Sparse','Default']
0
0
0
60
0
a
aa
aaa
aaaa
aaaaa
aaaaaa
a
aaaaaa
a
aaaaaa