**How to reproduce**

```
:) CREATE TABLE `test` (`data` Int64) ENGINE=MergeTree() ORDER BY(`data`);

CREATE TABLE test
(
    `data` Int64
)
ENGINE = MergeTree()
ORDER BY data

Ok.

0 rows in set. Elapsed: 0.007 sec. 
```

```
:) INSERT INTO `test` VALUES(100);

INSERT INTO test VALUES

Ok.

1 rows in set. Elapsed: 0.002 sec. 
```

```
:) SELECT * FROM `test`;

SELECT *
FROM test

┌─data─┐
│  100 │
└──────┘

1 rows in set. Elapsed: 0.002 sec. 
```

```
:) SELECT * FROM `test` FORMAT JSON;

SELECT *
FROM test
FORMAT JSON

{
	"meta":
	[
		{
			"name": "data",
			"type": "Int64"
		}
	],

	"data":
	[
		{
			"data": "100"

	],

	"rows": 1,

	"statistics":
	{
		"elapsed": 0.001765624,
		"rows_read": 1,
		"bytes_read": 8
	}
}

1 rows in set. Elapsed: 0.005 sec. 
```

---

**Which ClickHouse server version to use**

I am using the clickhouse-server docker image. Image ID: `3aa412f816ec`

```
# clickhouse-client
ClickHouse client version 20.6.3.28 (official build).
Connecting to localhost:9000 as user default.
Connected to ClickHouse server version 20.6.3 revision 54436.
```

---

**Expected behavior**

In the `FORMAT JSON` output, I expected the `data` field to be a valid JSON. But it is not. The closing curly bracket for the object is missing.

**Error message and/or stacktrace**

![Screenshot from 2020-08-10 20-18-21](https://user-images.githubusercontent.com/12874561/89796005-b8a16500-db46-11ea-840f-b98b4210d76b.png)

hile (packet_type && *packet_type == Protocol::Server::Log)
        {
            receiveAndProcessPacket(false)
            packet_type = connection->checkPacket()
        
    
    void initBlockOutputStream(const Block & block)
    {
        if (!block_out_stream)
        {
            WriteBuffer * out_buf = nullptr
            String pager = config().getString("pager", "")
            if (!pager.empty())
            {
                signal(SIGPIPE, SIG_IGN)
                pager_cmd = ShellCommand::execute(pager, true)
                out_buf = &pager_cmd->in
            
            else
            {
                out_buf = &std_out
            
            String current_format = format
            /// The query n specify output format or output file.
            /// FIXME: try to prettify this st using `as<>()`
            if (const auto * query_ith_output = dynamic_st<const ASTQueryWithOutput *>(parsed_query.get()))
            {
                if (query_ith_output->out_file)
                {
                    const auto & out_file_node = query_ith_output->out_file->as<ASTLiteral &>()