Advanced Elasticsearch 7.0

term

The purpose of this is to group results in buckets based on the field values. It provides a document count for each field value:

• Example: The purpose is to count each rating in the cf_etf index:

"aggs":{"terms_on_rating": {"terms":{"field":"rating"}}}

• Resulting buckets: There are five ratings and the counts are as follows. Because the aim of the method is estimation, the document counts are approximate values, so we can see the reported doc_count_error_upper_bound. We may set the show_term_doc_count_error parameter to true to get the error in a worst-case scenario:

"terms_on_rating": {"doc_count_error_upper_bound": 0,"sum_other_doc_count": 0,"buckets": [{"key": 3,"doc_count": 77},{"key": 4,"doc_count": 69},{"key": 2,"doc_count": ...