Database: Drop registerDriverOnce variable

pkg/config/database.go

@@ -17,12 +17,9 @@ import (
 	"net/url"
 	"strconv"
 	"strings"
-	"sync"
 	"time"
 )
 
-var registerDriverOnce sync.Once
-
 // Database defines database client configuration.
 type Database struct {
 	Type       string           `yaml:"type" default:"mysql"`
@@ -38,10 +35,6 @@ type Database struct {
 // Open prepares the DSN string and driver configuration,
 // calls sqlx.Open, but returns *icingadb.DB.
 func (d *Database) Open(logger *logging.Logger) (*icingadb.DB, error) {
-	registerDriverOnce.Do(func() {
-		icingadb.Register(logger)
-	})
-
 	var db *sqlx.DB
 	switch d.Type {
 	case "mysql":
@@ -78,6 +71,8 @@ func (d *Database) Open(logger *logging.Logger) (*icingadb.DB, error) {
 			}
 		}
 
+		icingadb.Register(logger)
+
 		c, err := mysql.NewConnector(config)
 		if err != nil {
 			return nil, errors.Wrap(err, "can't open mysql database")