a
a
a
a
1
1
1
1
ab
ab
ab
ab
-
a	LowCardinality(String)	LowCardinality(UInt64)
a
ab
c
d
cb
db
-
61f0c404-5cb3-11e7-907b-a6006ad3dba0	61f0c404-5cb3-11e7-907b-a6006ad3dba0	61f0c404-5cb3-11e7-907b-a6006ad3dba0
\N	\N	\N