presto-main/src/main/java/io/prestosql/operator/scalar/VarbinaryFunctions.java/VarbinaryFunctions/length
class VarbinaryFunctions:    @Description("length of the given binary")
    @ScalarFunction
    @SqlType(StandardTypes.BIGINT)
    public static long length(@SqlType(StandardTypes.VARBINARY) Slice slice)
    {
        return slice.length();
    }