if err != nil {
		return err
	}
	borrow := signer.HashBorrower()
	hasher := hmac.New(borrow.Borrow, key)
	hasher.Write(token[:i])
	if !hmac.Equal((*bufp)[:n], hasher.Sum(nil)) {
		borrow.ReturnAll()
		return jwtgo.ErrSignatureInvalid
	}
	borrow.ReturnAll()

	if claims.AccessKey == "" && claims.Subject == "" {
		return jwtgo.NewValidationError("accessKey/sub missing",

	aggregate *aggVal
}

// SimpleArgFunc represents functions with simple expression
// arguments.
type SimpleArgFunc struct {
	FunctionName string `parser:" @(\"AVG\" | \"MAX\" | \"MIN\" | \"SUM\" |  \"COALESCE\" | \"NULLIF\" | \"TO_STRING\" | \"TO_TIMESTAMP\" | \"UTCNOW\" | \"CHAR_LENGTH\" | \"CHARACTER_LENGTH\" | \"LOWER\" | \"UPPER\") "`

	ArgsList []*Expression `parser:"\"(\" (@@ (\",\" @@)*)?\")\""`
}