Method Begin

db.go:767–783

Begin starts a new transaction. Multiple read-only transactions can be used concurrently but only one write transaction can be used at a time. Starting multiple write transactions will cause the calls to block and be serialized until the current write transaction finishes. Transactions should not b

(writable bool)

// IMPORTANT: You must close read-only transactions after you are finished or
// else the database will not reclaim old pages.
func (db *DB) Begin(writable bool) (t *Tx, err error) {
	if lg := db.Logger(); lg != discardLogger {
		lg.Debugf("Starting a new transaction [writable: %t]", writable)
		defer func() {
			if err != nil {
				lg.Errorf("Starting a new transaction [writable: %t] failed: %v", writable, err)
			} else {
				lg.Debugf("Starting a new transaction [writable: %t] successfully", writable)
			}
		}()
	}

	if writable {
		return db.beginRWTx()
	}
	return db.beginTx()
}

func (db *DB) Logger() Logger {
	if db == nil || db.logger == nil {