func FileWithLineNum() string {
	// Keep FileWithLineNum one frame outer than CallerFrame to preserve pre-v1.31.1 semantics.
	frame := callerFrame(4)
	if frame.PC != 0 {
		return string(strconv.AppendInt(append([]byte(frame.File), ':'), int64(frame.Line), 10))
	}

	return ""
}

func IsInvalidDBNameChar(c rune) bool {