**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)

current_format, buf, sample, insert_format_max_block_size)
        const auto & column_defaults = columns_description.getDefaults()
        if (!column_defaults.empty())
            block_input = std::make_shared<AddingDefaultsBlockInputStream>(block_input, column_defaults, context)
        BlockInputStreamPtr async_block_input = std::make_shared<AsynchronousBlockInputStream>(block_input)
        async_block_input->readPrefix()
        hile (true)
        {
            Block block = async_block_input->read()
            /// Check if server send Log packet
            receiveLogs()
            /// Check if server send Exception packet
            checkPacket()
            if (packet_type && *packet_type == Protocol::Server::Exception)
            {
                /*
                 * We're exiting ith error, so it makes sense to kill the
                 * input stream ithout aiting for it to complete.
                 */
                async_block_input->ncel(true)
                return
            
            connection->sendDa(block)
            processed_ros += block.ros()
            if (!block)
                break
        
        async_block_input->readSuffix()
    
    /// Flush all buffers.