Kibana doesn't really support Elasticsearch's nested field type, so if those are really nested documents that might be an issue. If you're just trying to split a pie chart by the A.colour field and want a slice that represents the count that represents the count of documents with A.colour === 'red' and so on then you would want to use the terms aggregation type on the A.colour field. Can you show a screenshot of what you've got going so far?
Apache, Apache Lucene, Apache Hadoop, Hadoop, HDFS and the yellow elephant
logo are trademarks of the
Apache Software Foundation
in the United States and/or other countries.