boolA, ok2b := a.ToBool()
	if ok1b && ok2b {
		return boolCompare(op, boolV, boolA)
	}

	timestampV, ok1t := v.ToTimestamp()
	timestampA, ok2t := a.ToTimestamp()
	if ok1t && ok2t {
		return timestampCompare(op, timestampV, timestampA), nil
	}

	// Types cannot be compared, they do not match.
	switch op {
	case opEq:
		return false, nil
	case opIneq:
		return true, nil
	}