JSONColumns
{
	"a": [0, 1, 2, 3, 4],
	"b": ["String", "String", "String", "String", "String"],
	"c": [[[[],"String"],[[],"gnirtS"]], [[[0],"String"],[[0],"gnirtS"]], [[[0,1],"String"],[[0,1],"gnirtS"]], [[[],"String"],[[0,1,2],"gnirtS"]], [[[0],"String"],[[],"gnirtS"]]]
}
a	Nullable(Int64)					
b	Nullable(String)					
c	Array(Tuple(Array(Nullable(Int64)), Nullable(String)))					
0	String	[([],'String'),([],'gnirtS')]
1	String	[([0],'String'),([0],'gnirtS')]
2	String	[([0,1],'String'),([0,1],'gnirtS')]
3	String	[([],'String'),([0,1,2],'gnirtS')]
4	String	[([0],'String'),([],'gnirtS')]
JSONCompactColumns
[
	[0, 1, 2, 3, 4],
	["String", "String", "String", "String", "String"],
	[[[[],"String"],[[],"gnirtS"]], [[[0],"String"],[[0],"gnirtS"]], [[[0,1],"String"],[[0,1],"gnirtS"]], [[[],"String"],[[0,1,2],"gnirtS"]], [[[0],"String"],[[],"gnirtS"]]]
]
c1	Nullable(Int64)					
c2	Nullable(String)					
c3	Array(Tuple(Array(Nullable(Int64)), Nullable(String)))					
0	String	[([],'String'),([],'gnirtS')]
1	String	[([0],'String'),([0],'gnirtS')]
2	String	[([0,1],'String'),([0,1],'gnirtS')]
3	String	[([],'String'),([0,1,2],'gnirtS')]
4	String	[([0],'String'),([],'gnirtS')]
JSONColumnsWithMetadata
{
	"meta":
	[
		{
			"name": "sum",
			"type": "UInt64"
		},
		{
			"name": "avg",
			"type": "Float64"
		}
	],

	"data":
	{
		"sum": ["1", "2", "3", "4"],
		"avg": [1, 2, 3, 2]
	},

	"totals":
	{
		"sum": "10",
		"avg": 2
	},

	"extremes":
	{
		"min":
		{
			"sum": "1",
			"avg": 1
		},
		"max":
		{
			"sum": "4",
			"avg": 3
		}
	},

	"rows": 4,

	"statistics":
	{
		"rows_read": 5,
		"bytes_read": 20
	}
}
b	Nullable(Int64)					
a	Nullable(Int64)					
c	Nullable(Int64)					
d	Nullable(String)					
1	3	\N	\N
2	2	\N	\N
3	1	\N	\N
\N	\N	1	\N
\N	\N	2	\N
\N	\N	3	\N
\N	\N	\N	String
OK
3	
2	
1	
c1	Nullable(Int64)					
c2	Nullable(Int64)					
c3	Nullable(String)					
1	1	\N
2	2	\N
3	3	\N
1	\N	\N
2	\N	\N
3	\N	\N
1	2	String
OK
OK