This issue is hard to reproduce, it happens 10 times in last 24 hours

duration_hr is a field with type Decimal (13, 4), I found some abnormal conversion during the ClickHouse replication, as below:
```
MySQL     ClickHouse
0.3333 -> -2147483653.2202
0.5000 -> -2147483653.0535
0.1667 -> -2147483653.3868
0.0833 -> -2147483653.4702
0.7500 -> -2147483652.8035
```
As you can see, a weired one among the normal ones:
```
│ HCAC    │ 2020-10-22 07:10:00 │           0.3333 │
│ HCAC    │ 2020-10-22 07:15:00 │           0.3333 │
│ HCAC    │ 2020-10-22 07:20:00 │           0.3333 │
│ HCAC    │ 2020-10-22 07:25:00 │           0.3333 │
│ HCAC    │ 2020-10-22 07:30:00 │           0.3333 │
│ HCAC    │ 2020-10-22 07:35:00 │ -2147483653.2202 │
│ HCAC    │ 2020-10-22 07:40:00 │           0.3333 │
│ HCAC    │ 2020-10-22 07:45:00 │           0.3333 │
│ HCAC    │ 2020-10-22 07:50:00 │           0.3333 │
│ HCAC    │ 2020-10-22 07:55:00 │           0.3333 │
│ HCAC    │ 2020-10-22 08:00:00 │           0.3333 │
│ HCAC    │ 2020-10-22 08:05:00 │           0.3333 │
```


-Lyon
#include "MySQLReplication.h"
#include <DataTypes/DataTypeString.h>
#include <IO/ReadBufferFromString.h>
#include <IO/MySQLBinlogEventReadBuffer.h>
#include <IO/ReadHelpers.h>
#include <IO/Operators.h>
#include <base/DateLUT.h>
#include <Common/FieldVisitorToString.h>
#include <Core/MySQL/PacketsGeneric.h>
#include <Core/MySQL/PacketsProtocolText.h>
namespace DB
{
namespace ErrorCodes
{
    extern const int UNKNOWN_EXCEPTION;
    extern const int LOGICAL_ERROR;
    extern const int ATTEMPT_TO_READ_AFTER_EOF;
    extern const int CANNOT_READ_ALL_DATA;
}
namespace MySQLReplication
{
    using namespace MySQLProtocol;
    using namespace MySQLProtocol::Generic;
    using namespace MySQLProtocol::ProtocolText;
    
    void EventHeader::parse(ReadBuffer & payload)