s3EXPORT_PARTITION

Sure!

Quick example:

dbadmin=> \d T
                                  List of Fields by Tables
 Schema | Table | Column |   Type    | Size | Default | Not Null | Primary Key | Foreign Key
--------+-------+--------+-----------+------+---------+----------+-------------+-------------
 public | T     | ts     | timestamp |    8 |         | f        | f           |
 public | T     | c1     | int       |    8 |         | f        | f           |
(2 rows)

dbadmin=> SELECT * FROM T;
             ts             | c1
----------------------------+----
 2021-01-03 18:44:00.795916 |  1
 2021-01-04 18:44:05.374714 |  2
 2021-01-05 18:44:08.886589 |  3
(3 rows)

dbadmin=> SELECT s3EXPORT_PARTITION(* USING PARAMETERS url='s3://bucket_name/test/bystate.date') OVER (PARTITION by to_char(ts, 'YYYYMMDD')) from T;
 rows |                         url
------+------------------------------------------------------
    1 | https://bucket_name/test/=20210103/bystate.39b4312b.date
    1 | https://bucket_name/test/=20210104/bystate.9e02d3ac.date
    1 | https://bucket_name/test/=20210105/bystate.e7c2c4c4.date
(3 rows)

dbadmin=> CREATE EXTERNAL TABLE t_ext (partition_column INT, ts TIMESTAMP, c1 INT) AS COPY FROM 's3://bucket_name/test/*/*';
CREATE TABLE

dbadmin=> SELECT * FROM t_ext ORDER BY 1;
 partition_column |             ts             | c1
------------------+----------------------------+----
         20210103 | 2021-01-03 18:44:00.795916 |  1
         20210104 | 2021-01-04 18:44:05.374714 |  2
         20210105 | 2021-01-05 18:44:08.886589 |  3
(3 rows)

I run this query
SELECT s3EXPORT_PARTITION(* USING PARAMETERS url='s3://bucket_name/test/bystate.date') OVER (PARTITION by to_char(ts, 'YYYYMMDD')) from T;
and I get this error..

my vertica version 10.0.1-6.

@reli said:
I run this query
SELECT s3EXPORT_PARTITION(* USING PARAMETERS url='s3://bucket_name/test/bystate.date') OVER (PARTITION by to_char(ts, 'YYYYMMDD')) from T;
and I get this error..

my vertica version 10.0.1-6.

it parse a part of the data but not all the data.
and in s3 the folder:

how to do it like this ? date=20201205

Not sure what you mean by "it parse a part of the data but not all the data"...

Can you run this query without error?

SELECT to_char(ts, 'YYYYMMDD')) from T;

For your question "how to do it like this ? date=20201205", you can use a sub-query and name the derived column that you are using as the partition...

Example:

dbadmin=> SELECT s3EXPORT_PARTITION(* USING PARAMETERS url='s3://bucket_name/test1/bystate.date') OVER (PARTITION BY date) FROM (SELECT TO_CHAR(ts, 'YYYYMMDD') AS date, * FROM T) foo;
 rows |                            url
------+-----------------------------------------------------------
    1 | https://bucket_name/test1/date=20210103/bystate.8d999fa5.date
    1 | https://bucket_name/test1/date=20210104/bystate.60394485.date
    1 | https://bucket_name/test1/date=20210105/bystate.7deec715.date
(3 rows)

I will try to explain better,
I run this query:
SELECT s3EXPORT_PARTITION(* USING PARAMETERS url='s3://bucket_name/test/bystate.date') OVER (PARTITION by to_char(ts, 'YYYYMMDD'))
i get this error

the distinct value from the source table is

in s3 I get these folders only:

and there are files in the folders, but not all the folders that need to be.

Can you try running the export command from vsql?

I export command from vsql what you send,

SELECT s3EXPORT_PARTITION(* USING PARAMETERS url='s3://bucket_name/test1/bystate.date') OVER (PARTITION BY date) FROM (SELECT TO_CHAR(ts, 'YYYYMMDD') AS date, * FROM T) foo;

this is the result

but I get the same error, and not all the data in the folder:

ERROR 5861: Error calling processPartition() in User Function s3export_partition at [/data/qb_workspaces/jenkins2/ReleaseBuilds/Hammermill/REL-10_0_1-x_hammermill/build/udx/supported/AWS/S3.cpp:799], error code: 0, message: Unknown exception: No response body. Response code: 4294967295

Hi,

Hmm. Let's do some trouble shooting. First, can you post the DDL for the table?

SELECT export_objects('','T');

Once I have the DDL I will install your version of Vertica to test. What is the exact version you are running?

SELECT version();

Next, can you try running these?

SELECT s3EXPORT_PARTITION(* USING PARAMETERS url='s3://bucket_name/test1/bystate.date') OVER (PARTITION BY date) FROM (SELECT TO_CHAR(ts, 'YYYYMMDD') AS date, * FROM T WHERE TO_CHAR(ts, 'YYYYMMDD') = '20201209') foo;

SELECT s3EXPORT_PARTITION(* USING PARAMETERS url='s3://bucket_name/test1/bystate.date') OVER (PARTITION BY date) FROM (SELECT TO_CHAR(ts, 'YYYYMMDD') AS date, * FROM T WHERE TO_CHAR(ts, 'YYYYMMDD') = '20201210') foo;

SELECT s3EXPORT_PARTITION(* USING PARAMETERS url='s3://bucket_name/test1/bystate.date') OVER (PARTITION BY date) FROM (SELECT TO_CHAR(ts, 'YYYYMMDD') AS date, * FROM T WHERE TO_CHAR(ts, 'YYYYMMDD') = '20201211) foo;

1. Attach file -DDL table.
2. Version: Vertica Analytic Database v10.0.1-6
3. s3EXPORT_PARTITION:
   • 20201209 : fails
   • 20201210:fails
   • 20201211 : ok
     I have no explanation for why some succeed and some do not.

The DDL in your attached file is not Vertica DDL For example, it's referenceing a data type "numerivalue".

I add the new script in DDL Table, it is ok now?
Thank you so much for all the help.

I change the parameter chunksize and it's work!!
SELECT s3EXPORT_PARTITION(* USING PARAMETERS url=''s3://bucket_name/test1/bystate.date',chunksize=20485760) OVER (PARTITION BY date) FROM (SELECT TO_CHAR(ts, 'YYYYMMDD') AS date, * FROM T WHERE TO_CHAR(ts, 'YYYYMMDD') = '20201211') foo;
Thank you @Jim_Knicely