Dimitris Athanasiou 86291c12e2 Handle manual aggregations in datafeeds (elastic/elasticsearch#784)
* Handle manual aggregations in datafeeds

Adds a DataExtractor implementation that runs aggregated searches.

The manual aggregations supported have the following limitations:

- each aggregation can hava 0 or 1 sub-aggregations
- the top aggregation has to be a histogram
- sub-aggregations have to be either terms aggregations or single value
metric aggregations.

The response is converted into flat JSON documents that contain only the
fields of interest and can be parsed without additional context from our
JSON parser. The fields in the JSON documents correspond to the names of the aggregations.

Closes elastic/elasticsearch#680

Original commit: elastic/x-pack-elasticsearch@7dfd2d31e6
2017-01-25 19:13:03 +00:00
2018-04-20 14:16:58 -07:00
Description
🔎 Open source distributed and RESTful search engine.
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