package database/sql
NullInt64 represents an int64 that may be null. NullInt64 implements the Scanner interface so it can be used as a scan destination, similar to NullString.
Golang database/sql.NullInt64 type usage examples
Example 1:
var ni64 = sql.NullInt64{Valid: true}
Example 2:
// NullInt64
var ni sql.NullInt64
// Invalid
if err = nullStmt.QueryRow().Scan(&ni); err != nil {
dbt.Fatal(err)
}
if ni.Valid {
dbt.Error("Valid NullInt64 which should be invalid")
}
References :
https://github.com/go-sql-driver/mysql/blob/master/driver_test.go
http://golang.org/pkg/database/sql/#NullInt64
