db.Mux.RLock()
	if db.Stmts != nil {
		if stmt, ok := db.Stmts.Get(query); ok && (!stmt.Transaction || isTransaction) {
			db.Mux.RUnlock()
			return stmt, stmt.Error()
		}
	}
	db.Mux.RUnlock()

	// retry
	db.Mux.Lock()
	if db.Stmts != nil {
		if stmt, ok := db.Stmts.Get(query); ok && (!stmt.Transaction || isTransaction) {
			db.Mux.Unlock()

		return
	}

	// Check if bucket exists.
	if _, err := objAPI.GetBucketInfo(ctx, bucket, BucketOptions{}); err != nil {
		writeErrorResponse(ctx, w, toAPIError(ctx, err), r.URL)
		return
	}

	// Parse bucket encryption xml
	encConfig, err := validateBucketSSEConfig(io.LimitReader(r.Body, maxBucketSSEConfigSize))
	if err != nil {
		apiErr := APIError{
			Code:           "MalformedXML",

// kmsKeyIDFromMetadata returns any AWS S3 KMS key ID in the
// metadata, if any. It returns an empty ID if no key ID is
// present.
func kmsKeyIDFromMetadata(metadata map[string]string) string {
	const ARNPrefix = crypto.ARNPrefix
	if len(metadata) == 0 {
		return ""
	}
	kmsID, ok := metadata[crypto.MetaKeyID]
	if !ok {
		return ""
	}
	if strings.HasPrefix(kmsID, ARNPrefix) {
		return kmsID
	}

	for name, ok := range selectColumns {
		columnName := ""
		if strings.HasPrefix(name, association.Relationship.Name) {
			if columnName = strings.TrimPrefix(name, association.Relationship.Name); columnName == ".*" {
				columnName = name
			}
		} else if strings.HasPrefix(name, clause.Associations) {
			columnName = name
		}

		if columnName != "" {
			if ok {
				selectedSaveColumns = append(selectedSaveColumns, columnName)

		if err != nil {
			if errors.Is(err, errConfigNotFound) {
				lookupConfigs(srvCfg, objAPI)
				return srvCfg, nil
			}
			return nil, err
		}

		data, err = decryptData(data, configFile)
		if err != nil {
			lookupConfigs(srvCfg, objAPI)
			return nil, err
		}
	}

	json := jsoniter.ConfigCompatibleWithStandardLibrary

		txConfig.PrepareStmt = true
	}

	if config.SkipHooks {
		tx.Statement.SkipHooks = true
	}

	if config.DisableNestedTransaction {
		txConfig.DisableNestedTransaction = true
	}

	if !config.NewDB {
		tx.clone = 2
	}

	if config.DryRun {
		tx.Config.DryRun = true
	}

	if config.QueryFields {
		tx.Config.QueryFields = true
	}

	if config.Logger != nil {

	if keyID == "" && len(kmsKey) != 0 {
		logger.CriticalIf(context.Background(), errors.New("The key ID must not be empty if a KMS data key is present"))
	}
	if keyID != "" && len(kmsKey) == 0 {
		logger.CriticalIf(context.Background(), errors.New("The KMS data key must not be empty if a key ID is present"))
	}

	if metadata == nil {
		metadata = make(map[string]string, 5)
	}

	// Load rebalance metadata if present
	if err := z.loadRebalanceMeta(ctx); err == nil {
		// Start rebalance routine if we can reload rebalance metadata.
		z.StartRebalance()
	}

	meta := poolMeta{}
	if err := meta.load(ctx, z.serverPools[0], z.serverPools); err != nil {
		return err
	}

	update, err := meta.validate(z.serverPools)
	if err != nil {
		return err
	}

func (m MySQLArgs) Validate() error {
	if !m.Enable {
		return nil
	}

	if m.Format != "" {
		f := strings.ToLower(m.Format)
		if f != event.NamespaceFormat && f != event.AccessFormat {
			return fmt.Errorf("unrecognized format")
		}
	}

	if m.Table == "" {
		return fmt.Errorf("table unspecified")
	}

	if m.DSN != "" {
		if _, err := mysql.ParseDSN(m.DSN); err != nil {
			return err

	return d.disk.Healing()
}

func (d *naughtyDisk) Close() (err error) {
	if err = d.calcError(); err != nil {
		return err
	}
	return d.disk.Close()
}

func (d *naughtyDisk) calcError() (err error) {
	d.mu.Lock()
	defer d.mu.Unlock()
	d.callNR++
	if err, ok := d.errors[d.callNR]; ok {
		return err
	}
	if d.defaultErr != nil {
		return d.defaultErr
	}
	return nil
}