Loading parquet files with complex data type

What is your external table definition? What is the data type you are specifying in Vertica for BYTE_ARRAY type in the schema?

Which version of Vertica are you on? Structs were introduced in 9.2.

I'm certain that the documentation says that structs are supported in the context of External Tables. But you can attempt to load the data with structs using a COPY.

Use this guide as reference: https://www.vertica.com/docs/9.2.x/HTML/Content/Authoring/AdministratorsGuide/Tables/ExternalTables/Structs.htm

So a table in Hive with nested structs like the following:

create external table atomix
(
Id int,
capturedTimestamp timestamp,
location struct<
    latitude:double,
    longitude:double,
    postalCode:int >,
event struct<
    metadata:struct<
        triptype:string,
        tripcode:int> >
)
stored as parquet location '/user/data/atomix';

Can be written as an External Table in Vertica as:

create external table atomix
(
    Id int ,
    capturedTimestamp timestamptz ,
    "location.latitude" float,
    "location.longitude" float,
    "location.postalCode" int,
    "event.metadata.triptype" varchar,
    "event.metadata.tripcode" int
)
as copy from '/home/dbadmin/atomix.parquet' PARQUET;

Select:

dbadmin=> select * from atomix ;
 Id |   capturedTimestamp    | location.latitude | location.longitude | location.postalCode | event.metadata.triptype | event.metadata.tripcode
----+------------------------+-------------------+--------------------+---------------------+-------------------------+-------------------------
  1 | 2019-08-08 03:00:00-04 |             12.12 |              13.14 |              123456 | funtrip                 |                     321
(1 row)

You can create a regular table like below and even do a COPY.

CREATE TABLE atomix_regular
(
    Id int ,
    capturedTimestamp timestamptz ,
    "location.latitude" float,
    "location.longitude" float,
    "location.postalCode" int,
    "event.metadata.triptype" varchar,
    "event.metadata.tripcode" int
);

-

dbadmin=> COPY atomix_regular FROM '/home/dbadmin/atomix.parquet' PARQUET;
 Rows Loaded
-------------
           1
(1 row)

Attached atomix.parquet that I used.

Ah, that make sense, thank you. Using 9.1.0-1. OK, going to upgrade to 9.2 and will give it a try, thank you!