DRY ConnPool Begin and BeginIso

conn_pool.go

@@ -214,25 +214,7 @@ func (p *ConnPool) QueryRow(sql string, args ...interface{}) *Row {
 // Begin acquires a connection and begins a transaction on it. When the
 // transaction is closed the connection will be automatically released.
 func (p *ConnPool) Begin() (*Tx, error) {
-	for {
-		c, err := p.Acquire()
-		if err != nil {
-			return nil, err
-		}
-
-		tx, err := c.Begin()
-		if err == ErrDeadConn {
-			p.Release(c)
-			continue
-		}
-		if err != nil {
-			p.Release(c)
-			return nil, err
-		}
-
-		tx.pool = p
-		return tx, nil
-	}
+	return p.BeginIso("")
 }
 
 // BeginIso acquires a connection and begins a transaction in isolation mode iso