How to Parse Time from a Database: Why am I getting the 'unsupported driver -> Scan pair: []uint8 -> *time.Time' error?

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Parsing Time from a Database: Troubleshooting and Solutions

When working with databases, it's common to encounter errors while attempting to retrieve data. In this specific case, the error message "unsupported driver -> Scan pair: []uint8 -> *time.Time" indicates that the database driver is unable to automatically convert the retrieved data (in this case, a byte array) into a time.Time value.

To rectify this issue, one can utilize the parseTime parameter in the connection string. Setting parseTime=true instructs the driver to automatically parse MySQL's DATE and DATETIME values into time.Time objects.

Example:

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

By enabling parseTime, the driver will seamlessly convert time values, allowing for direct assignment to time.Time variables.

Example with SQL Statement:

var myTime time.Time
rows, err := db.Query("SELECT current_timestamp()")

Note: This approach works with current_timestamp but not current_time. If you require current_time data parsing, you'll need to implement a custom parsing mechanism.

Custom Parsing:

1. Define a custom type that wraps the original data type to handle parsing:

type rawTime []byte

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

2. Use the custom type in the scanning code:

var myTime rawTime
rows, err := db.Query("SELECT current_time()")

3. Retrieve the parsed time.Time value using the custom method:

fmt.Println(myTime.Time())

By following these steps, you can effectively parse time values from the database and handle different data formats with ease.

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