1 réponse
- Le plus récent
- Le plus de votes
- La plupart des commentaires
0
When using the Amazon Athena UNLOAD command, it uses the default serializer LazySimpleSerDe. This serializer outputs empty values as Null, like you are experiencing, and cannot be changed.
One option is to specify each column in your select that you do not want to output to null and use a function to transform nulls. This would be instead of doing a SELECT *
.
For example:
UNLOAD (SELECT col1, COALESCE(col2,'') FROM table)
TO 's3://my_athena_data_location/my_folder/'
WITH (format = 'JSON')
References:
répondu il y a 7 mois
Contenus pertinents
- demandé il y a 7 mois
- demandé il y a un an
- demandé il y a 2 mois
- AWS OFFICIELA mis à jour il y a 2 ans