HTTPStatusCode: http.StatusBadRequest,
	},
	ErrInvalidDataSource: {
		Code:           "InvalidDataSource",
		Description:    "Invalid data source type. Only CSV and JSON are supported at this time.",
		HTTPStatusCode: http.StatusBadRequest,
	},
	ErrInvalidExpressionType: {
		Code:           "InvalidExpressionType",

		// that involves a List() on a directory
		// where directory is actually an object on
		// namespace.
		for _, k := range []string{
			"_SUCCESS/",
			".parquet/",
			".csv/",
			".json/",
			".avro/",
			".orc/",
			".txt/",
			// Add any other files in future
		} {
			if strings.HasSuffix(prefix, k) {
				return true
			}
		}
		return false
	}