sql

type Null ¶

type Null[T any] struct {
	V     T
	Valid bool
}

Null represents a value that may be null. Null implements the [Scanner] interface so it can be used as a scan destination:

var s Null[string]
err := db.QueryRow("SELECT name FROM foo WHERE id=?", id).Scan(&s)
...
if s.Valid {
   // use s.V
} else {
   // NULL value
}

T should be one of the types accepted by driver.Value.

func (n *Null[T]) Scan(value any) error

func (n Null[T]) Value() (driver.Value, error)