support query distributed table with JSON column

[lrita]

Summary

Support query distributed table with JSON column. When distributed table with JSON column, clickhouse not return Tuple column as query result. e.g. with table:

CREATE TABLE xxx.xx_log_cl
(
    `log_time` DateTime64(3, 'Asia/Shanghai'),
    `log_type` String,
    `ip` String,
    `client_ip` String,
    `id` String,
    `request_id` String,
    `category` String,
    `service_type` Int32,
    `logs` Object('json')
)
ENGINE = Distributed('cluster_1', 'xxx', 'xx_log', rand())

current code crash with:

panic: Not implemented [recovered]
	panic: Not implemented

goroutine 12 [running]:
testing.tRunner.func1.2({0xbdba20, 0xe90eb0})
	/Users/yanqing11/dev/go/src/testing/testing.go:1389 +0x24e
testing.tRunner.func1()
	/Users/yanqing11/dev/go/src/testing/testing.go:1392 +0x39f
panic({0xbdba20, 0xe90eb0})
	/Users/yanqing11/dev/go/src/runtime/panic.go:838 +0x207
github.com/ClickHouse/clickhouse-go/v2/lib/column.(*JSONObject).ScanRow(0xc00070f8e8?, {0xbbedc0?, 0xc000236740?}, 0x40d7e5?)
	/Users/yanqing11/dev/app/src/github.com/ClickHouse/clickhouse-go/lib/column/json.go:856 +0x27
github.com/ClickHouse/clickhouse-go/v2.scan(0xc0000302c0, 0x1, {0xc000010120?, 0x9, 0xbbed01?})
	/Users/yanqing11/dev/app/src/github.com/ClickHouse/clickhouse-go/scan.go:82 +0x1ab
github.com/ClickHouse/clickhouse-go/v2.(*rows).Scan(0xbbedc0?, {0xc000010120?, 0x10?, 0xcebc7e?})
	/Users/yanqing11/dev/app/src/github.com/ClickHouse/clickhouse-go/clickhouse_rows.go:75 +0xa5
github.com/ClickHouse/clickhouse-go/v2/tests.TestMultipleJSONRows(0xc0006c29c0)
	/Users/yanqing11/dev/app/src/github.com/ClickHouse/clickhouse-go/tests/json_test.go:317 +0x222d
testing.tRunner(0xc0006c29c0, 0xda9400)
	/Users/yanqing11/dev/go/src/testing/testing.go:1439 +0x102
created by testing.(*T).Run
	/Users/yanqing11/dev/go/src/testing/testing.go:1486 +0x35f

Checklist

Delete items not relevant to your PR:

• Unit and integration tests covering the common scenarios were added
  • I have no friendly way to create Distributed table in unit test with test docker container and extern clickhouse cluster. Then there is no uint test code commit.

[CLAassistant]

All committers have signed the CLA.

[jkaflik]

@lrita, thanks for your contribution. Can you please add test cases, at least with the happy path?

[jkaflik]

what is exactly the case here? Decode func wasn't called prior?
let's make it more describtive

[jkaflik]

@lrita please have a look at a test checks report. (please skip cloud tests, since it's expected to break for ppl outside org)

[SpencerTorres]

The Object('json') type has been deprecated and this portion of the code will soon be removed.

The new JSON type in Go was added in: #1455