目前已经测试过的mysql类型和对应映射的go类型
| mysql type | go type |
|---|---|
| bigint | int64 |
| bigint unsigned | uint64 |
| int | int64 |
| int unsigned | uint64 |
| varchar | string |
| char | string |
| text | string |
| float | float64 |
| double | float64 |
| DECIMAL | float64 |
| enum | string |
| bit | int64 |
| date | time.time{} |
| time | time.time{} |
| datetime | time.time{} |
| timestamp | time.time{} |
| VARBINARY | []byte |
| BINARY | []byte |
| BLOB | string |