AWS Athena CTAS 查询失败，建议清空空桶

Question

I am running a "CREATE TABLE AS SELECT (CTAS) query" ( https://docs.aws.amazon.com/athena/latest/ug/ctas.html ), query copied at bottom. I am getting the following error message:

HIVE_PATH_ALREADY_EXISTS: Target directory for table 'default.openaq_processed' already exists:
 s3://<processed-data-bucketname>/. You may need to manually clean the data at location 
's3://<athena-query-results-bucketname>/Unsaved/2021/04/29/tables/82025a35-8867-4865-8f42-f40adb6bee4c' 
before retrying. Athena will not delete data in your account.

This query ran against the "default" database, unless qualified by the query. Please post the
 error message on our forum or contact customer support with Query Id: 82025a35-8867-4865-8f42-f40adb6bee4c.

The AWS knowledge center page on this error ( https://aws.amazon.com/premiumsupport/knowledge-center/athena-hive-path-already-exists/ ), like the error message above, suggests that the fix is to ensure the location used to store the query results must be empty.

But it already is. In fact there's no tables/ prefix/folder in s3://<athena-query-results-bucketname>/Unsaved/2021/04/29/ , and the s3://<processed-data-bucketname>/ bucket is totally empty.

I've posted the question on the AWS forum but no responses, any suggestions on how I might get this CTAS query to succeed would be much appreciated.

UPDATE: The query that throws the error:

CREATE TABLE openaq_processed
WITH (format='PARQUET', 
parquet_compression='SNAPPY', 
partitioned_by=array['country', 'parameter'], 
external_location = '<processed-data-bucketname>') 
AS
SELECT date_utc as date_utc_str,
date_local as date_local_str,
CAST(from_iso8601_timestamp(date_utc) as timestamp) as timestamp_utc,
CAST(from_iso8601_timestamp(date_local) as timestamp) as timestamp_local,
"location",  -- location is a reserved word for Athena, needs quotes
value,
unit,
city,
attribution,
averagingperiod,
coordinates."latitude" as latitude,
coordinates."longitude" as longitude,
sourcename,
sourcetype,
mobile,
country,
parameter
FROM openaq_pq2_tables

Answer 1

So I sprung for AWS Developer Support and asked this question. The response I got, which indeed fixed the error, was to create a folder within my external_location bucket. Not sure why this is necessary but apparently it is.

So, from shell: $ aws s3 mb s3://<processed-data-bucketname>/processed_data/

( mb above stands for "make bucket").

Then updating external_location = 's3://<processed-data-bucketname>' in the query above to external_location = 's3://<processed-data-bucketname>/processed_data/')