sql

package

v0.0.0-...-080183e Latest Latest Go to latest Published: Sep 28, 2023 License: BSD-3-Clause Imports: 8 Imported by: 0

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Package sql provides a generic interface around SQL (or SQL-like) databases.

The sql package must be used in conjunction with a database driver. See https://golang.org/s/sqldrivers for a list of drivers.

Drivers that do not support context cancellation will not return until after the query is completed.

For usage examples, see the wiki page at https://golang.org/s/sqlwiki.

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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
}

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

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