Executing the date histogram aggregation
The previous recipe works mainly on numeric fields; ElasticSearch provides a custom date histogram aggregation to operate on date/date-time values. This aggregation is required because date values need more customization to solve problems such as time zone conversion and special time intervals.
Getting ready
You need a working ElasticSearch cluster and an index populated with the script (chapter_06/executing_date_histogram_aggregations.sh) available at https://github.com/aparo/elasticsearch-cookbook-second-edition.
How to do it...
We need two different date/time aggregations that are:
- An annual aggregation
- A quarter aggregation, but with time zone +1:00
To execute date histogram aggregations, we will perform the ...
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