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
{
                    column_meta.emplace_back(UInt16(meta[pos]));
                    pos += 1;
                    break;
                }
                case MYSQL_TYPE_NEWDECIMAL:
                case MYSQL_TYPE_STRING:
                {
                    
                    auto b0 = UInt16(meta[pos] << 8);
                    auto b1 = UInt8(meta[pos + 1]);
                    column_meta.emplace_back(UInt16(b0 + b1));
                    pos += 2;
                    break;
                }
                case MYSQL_TYPE_VARCHAR:
                case MYSQL_TYPE_VAR_STRING: {
                    
                    auto b0 = UInt8(meta[pos]);
                    auto b1 = UInt16(meta[pos + 1] << 8);
                    column_meta.emplace_back(UInt16(b0 + b1));
                    pos += 2;
                    break;
                }
                default:
                    throw ReplicationError("ParseMetaData: Unhandled data type:" + std::to_string(typ), ErrorCodes::UNKNOWN_EXCEPTION);
            }
        }
    }
    void TableMapEvent::dump(WriteBuffer & out) const