72 lines
1.8 KiB
Go
72 lines
1.8 KiB
Go
// Go MySQL Driver - A MySQL-Driver for Go's database/sql package
|
|
//
|
|
// Copyright 2013 The Go-MySQL-Driver Authors. All rights reserved.
|
|
//
|
|
// This Source Code Form is subject to the terms of the Mozilla Public
|
|
// License, v. 2.0. If a copy of the MPL was not distributed with this file,
|
|
// You can obtain one at http://mozilla.org/MPL/2.0/.
|
|
|
|
package mysql
|
|
|
|
import (
|
|
"database/sql"
|
|
"database/sql/driver"
|
|
"fmt"
|
|
"time"
|
|
)
|
|
|
|
// NullTime represents a time.Time that may be NULL.
|
|
// NullTime implements the Scanner interface so
|
|
// it can be used as a scan destination:
|
|
//
|
|
// var nt NullTime
|
|
// err := db.QueryRow("SELECT time FROM foo WHERE id=?", id).Scan(&nt)
|
|
// ...
|
|
// if nt.Valid {
|
|
// // use nt.Time
|
|
// } else {
|
|
// // NULL value
|
|
// }
|
|
//
|
|
// # This NullTime implementation is not driver-specific
|
|
//
|
|
// Deprecated: NullTime doesn't honor the loc DSN parameter.
|
|
// NullTime.Scan interprets a time as UTC, not the loc DSN parameter.
|
|
// Use sql.NullTime instead.
|
|
type NullTime sql.NullTime
|
|
|
|
// Scan implements the Scanner interface.
|
|
// The value type must be time.Time or string / []byte (formatted time-string),
|
|
// otherwise Scan fails.
|
|
func (nt *NullTime) Scan(value interface{}) (err error) {
|
|
if value == nil {
|
|
nt.Time, nt.Valid = time.Time{}, false
|
|
return
|
|
}
|
|
|
|
switch v := value.(type) {
|
|
case time.Time:
|
|
nt.Time, nt.Valid = v, true
|
|
return
|
|
case []byte:
|
|
nt.Time, err = parseDateTime(v, time.UTC)
|
|
nt.Valid = (err == nil)
|
|
return
|
|
case string:
|
|
nt.Time, err = parseDateTime([]byte(v), time.UTC)
|
|
nt.Valid = (err == nil)
|
|
return
|
|
}
|
|
|
|
nt.Valid = false
|
|
return fmt.Errorf("Can't convert %T to time.Time", value)
|
|
}
|
|
|
|
// Value implements the driver Valuer interface.
|
|
func (nt NullTime) Value() (driver.Value, error) {
|
|
if !nt.Valid {
|
|
return nil, nil
|
|
}
|
|
return nt.Time, nil
|
|
}
|