Parquet
a	Nullable(UInt64)					
b	Nullable(String)					
c	Array(Nullable(UInt64))					
d	Tuple(\n    a Nullable(UInt64),\n    b Nullable(String))					
ORC
a	Nullable(Int64)					
b	Nullable(String)					
c	Array(Nullable(Int64))					
d	Tuple(\n    a Nullable(Int64),\n    b Nullable(String))					
Arrow
a	Nullable(UInt64)					
b	Nullable(String)					
c	Array(Nullable(UInt64))					
d	Tuple(\n    a Nullable(UInt64),\n    b Nullable(String))					
ArrowStream
a	Nullable(UInt64)					
b	Nullable(String)					
c	Array(Nullable(UInt64))					
d	Tuple(\n    a Nullable(UInt64),\n    b Nullable(String))					
Avro
a	Int64					
b	String					
c	Array(Int64)					
d	Tuple(\n    a Int64,\n    b String)					
Native
a	UInt64					
b	String					
c	Array(UInt64)					
d	Tuple(\n    a UInt64,\n    b String)					
BSONEachRow
a	Nullable(Int64)					
b	Nullable(String)					
c	Array(Nullable(Int64))					
d	Tuple(\n    a Nullable(Int64),\n    b Nullable(String))					
JSONCompact
a	UInt64					
b	String					
c	Array(UInt64)					
d	Tuple(\n    a UInt64,\n    b String)					
Values
c1	Nullable(UInt64)					
c2	Nullable(String)					
c3	Array(Nullable(UInt64))					
c4	Tuple(Nullable(UInt64), Nullable(String))					
TSKV
a	Nullable(String)					
b	Nullable(String)					
c	Array(Nullable(UInt64))					
d	Nullable(String)					
JSONObjectEachRow
a	Nullable(String)					
b	Nullable(String)					
c	Array(Nullable(String))					
d	Tuple(\n    a Nullable(String),\n    b Nullable(String))					
JSONColumns
a	Nullable(String)					
b	Nullable(String)					
c	Array(Nullable(String))					
d	Tuple(\n    a Nullable(String),\n    b Nullable(String))					
JSONCompactColumns
c1	Nullable(String)					
c2	Nullable(String)					
c3	Array(Nullable(String))					
c4	Tuple(\n    a Nullable(String),\n    b Nullable(String))					
JSONCompact
a	UInt64					
b	String					
c	Array(UInt64)					
d	Tuple(\n    a UInt64,\n    b String)					
JSON
a	UInt64					
b	String					
c	Array(UInt64)					
d	Tuple(\n    a UInt64,\n    b String)					
TSV
c1	Nullable(UInt64)					
c2	Nullable(String)					
c3	Array(Nullable(UInt64))					
c4	Tuple(Nullable(UInt64), Nullable(String))					
CSV
c1	Nullable(UInt64)					
c2	Nullable(String)					
c3	Array(Nullable(UInt64))					
c4	Nullable(UInt64)					
c5	Nullable(String)					
a	Nullable(String)					
b	Nullable(String)					
c	Array(Nullable(String))					
d	Tuple(\n    a Nullable(String),\n    b Nullable(String))					
a	UInt64					
b	String					
c	Array(UInt64)					
d	Tuple(\n    a UInt64,\n    b String)					
a	Nullable(String)					
b	Nullable(String)					
c	Array(Nullable(String))					
d	Tuple(\n    a Nullable(String),\n    b Nullable(String))					
a	Nullable(String)					
b	Nullable(String)					
c	Array(Nullable(String))					
d	Tuple(\n    a Nullable(String),\n    b Nullable(String))					
a	Nullable(String)					
b	Nullable(String)					
c	Array(Nullable(String))					
d	Tuple(\n    a Nullable(String),\n    b Nullable(String))					
a	Nullable(String)					
b	Nullable(String)					
c	Array(Nullable(String))					
d	Tuple(\n    a Nullable(String),\n    b Nullable(String))					
a	Nullable(String)					
b	Nullable(String)					
c	Array(Nullable(String))					
d	Tuple(\n    a Nullable(String),\n    b Nullable(String))					
1
a	Nullable(String)					
b	Nullable(String)					
c	Array(Nullable(String))					
d	Tuple(\n    a Nullable(String),\n    b Nullable(String))					
a	Nullable(String)					
b	Nullable(String)					
c	Array(Nullable(String))					
d	Tuple(\n    a Nullable(String),\n    b Nullable(String))