fix: support account creation on pxc

server/db/mysql/adapter.go

@@ -1859,6 +1859,9 @@ func (a *adapter) UserCreate(user *t.User) error {
 func lockUserAccountNoSequence(ctx context.Context, tx *sqlx.Tx) (func(), error) {
 	var locked sql.NullInt64
 	if err := tx.QueryRowContext(ctx, "SELECT GET_LOCK(CONCAT(DATABASE(), ':im_users_account_no'), 10)").Scan(&locked); err != nil {
+		if isPXCStrictModeNamedLockError(err) {
+			return func() {}, nil
+		}
 		return nil, err
 	}
 	if !locked.Valid || locked.Int64 != 1 {
@@ -5105,6 +5108,20 @@ func isIDOutOfRange(err error) bool {
 	return ok && myerr.Number == 1264 && strings.Contains(strings.ToLower(myerr.Message), "id")
 }
 
+func isPXCStrictModeNamedLockError(err error) bool {
+	if err == nil {
+		return false
+	}
+	myerr, ok := err.(*ms.MySQLError)
+	if !ok || myerr.Number != 1105 {
+		return false
+	}
+	msg := strings.ToLower(myerr.Message)
+	return strings.Contains(msg, "percona-xtradb-cluster") &&
+		strings.Contains(msg, "pxc_strict_mode") &&
+		(strings.Contains(msg, "get_lock") || strings.Contains(msg, "release_lock"))
+}
+
 func mysqlDefaultString(value, fallback string) string {
 	if strings.TrimSpace(value) == "" {
 		return fallback

server/db/mysql/adapter_pxc_test.go

@@ -0,0 +1,35 @@
+//go:build mysql
+
+package mysql
+
+import (
+	"errors"
+	"testing"
+
+	ms "github.com/go-sql-driver/mysql"
+)
+
+func TestPXCStrictModeNamedLockError(t *testing.T) {
+	err := &ms.MySQLError{
+		Number:  1105,
+		Message: "Percona-XtraDB-Cluster prohibits use of GET_LOCK with pxc_strict_mode = ENFORCING",
+	}
+	if !isPXCStrictModeNamedLockError(err) {
+		t.Fatal("expected PXC GET_LOCK strict mode error to be recognized")
+	}
+
+	err = &ms.MySQLError{
+		Number:  1105,
+		Message: "Percona-XtraDB-Cluster prohibits use of RELEASE_LOCK with pxc_strict_mode = ENFORCING",
+	}
+	if !isPXCStrictModeNamedLockError(err) {
+		t.Fatal("expected PXC RELEASE_LOCK strict mode error to be recognized")
+	}
+
+	if isPXCStrictModeNamedLockError(&ms.MySQLError{Number: 1062, Message: "Duplicate entry"}) {
+		t.Fatal("duplicate errors must not be recognized as PXC named lock errors")
+	}
+	if isPXCStrictModeNamedLockError(errors.New("GET_LOCK failed")) {
+		t.Fatal("generic errors must not be recognized as PXC named lock errors")
+	}
+}