How to Resolve 'unsupported driver -> Scan pair: []uint8 -> *time.Time' Error When Retrieving Time Data from MySQL in Golang?

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Understanding the Parse Time Error from Database in Golang

When attempting to retrieve time data from a MySQL database using Golang, you may encounter an error similar to the following:

unsupported driver -> Scan pair: []uint8 -> *time.Time

This error arises because the default behavior of the Go SQL driver does not automatically parse DATE or DATETIME fields from MySQL into the Go time.Time type.

Solution 1: Enable Automatic Parsing

To resolve this issue, you can enable automatic parsing by adding parseTime=true to your database connection string.

db, err := sql.Open("mysql", "root:@/?parseTime=true")

With this setting, the driver will automatically convert DATE and DATETIME values to time.Time objects.

Solution 2: Custom Parsing

If you encounter specific parsing requirements, you can opt for custom parsing. To do this:

• Define a custom type that wraps []byte and includes a Time() method for parsing.

  type rawTime []byte
  
  func (t rawTime) Time() (time.Time, error) {
    return time.Parse("15:04:05", string(t))
  }

• Use your custom type in your scanning code to manually parse the time value.

  var myTime rawTime
  rows, err := db.Query("SELECT current_time()")
  
  if rows.Next() {
    if err = rows.Scan(&myTime); err != nil {
        panic(err)
    }
  }
  
  fmt.Println(myTime.Time())

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