func errUnsupportedSyntax(err error) *s3Error {
	return &s3Error{
		code:       "UnsupportedSyntax",
		message:    "Encountered invalid syntax.",
		statusCode: 400,
		cause:      err,
	}
}

func errAmbiguousFieldName(err error) *s3Error {
	return &s3Error{
		code:       "AmbiguousFieldName",
		message:    "Field name matches to multiple fields in the file. Check the SQL expression and the file, and try again.",
		statusCode: 400,