Executing the stats aggregation
The most commonly used metric aggregations are stats aggregations. They are generally used as terminal aggregation steps to compute a value to be used directly or for sorting.
Getting ready
You need a working ElasticSearch cluster and an index populated with the script (chapter_06/executing_stat_aggregations.sh
) available at https://github.com/aparo/elasticsearch-cookbook-second-edition.
How to do it...
To execute a stats aggregation, we will perform the steps given as follows:
- We want to calculate all statistical values of a matched query in the
age
field. The REST call should be as follows:curl -XPOST "http://127.0.0.1:9200/test-index/_search?size=0" -d ' { "query": { "match_all": {} }, "aggs": { "age_stats": ...
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