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Remove MovingAverage pipeline aggregation #39328

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merged 4 commits into from
Mar 19, 2019
Merged

Remove MovingAverage pipeline aggregation #39328

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6853049
Remove MovingAverage pipeline aggregation
polyfractal Feb 22, 2019
75b04ef
Remove some missed movavg regerences
polyfractal Feb 22, 2019
dcd49aa
Fix test
polyfractal Feb 25, 2019
1d12671
Merge remote-tracking branch 'origin/master' into remove_movavg
polyfractal Mar 19, 2019
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17 changes: 8 additions & 9 deletions docs/reference/aggregations/pipeline.asciidoc
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Original file line number Diff line number Diff line change
Expand Up @@ -46,7 +46,7 @@ For example, the path `"my_bucket>my_stats.avg"` will path to the `avg` value in
contained in the `"my_bucket"` bucket aggregation.

Paths are relative from the position of the pipeline aggregation; they are not absolute paths, and the path cannot go back "up" the
aggregation tree. For example, this moving average is embedded inside a date_histogram and refers to a "sibling"
aggregation tree. For example, this derivative is embedded inside a date_histogram and refers to a "sibling"
metric `"the_sum"`:

[source,js]
Expand All @@ -63,16 +63,15 @@ POST /_search
"the_sum":{
"sum":{ "field": "lemmings" } <1>
},
"the_movavg":{
"moving_avg":{ "buckets_path": "the_sum" } <2>
"the_deriv":{
"derivative":{ "buckets_path": "the_sum" } <2>
}
}
}
}
}
--------------------------------------------------
// CONSOLE
// TEST[warning:The moving_avg aggregation has been deprecated in favor of the moving_fn aggregation.]
<1> The metric is called `"the_sum"`
<2> The `buckets_path` refers to the metric via a relative path `"the_sum"`

Expand Down Expand Up @@ -115,7 +114,8 @@ POST /_search
=== Special Paths

Instead of pathing to a metric, `buckets_path` can use a special `"_count"` path. This instructs
the pipeline aggregation to use the document count as its input. For example, a moving average can be calculated on the document count of each bucket, instead of a specific metric:
the pipeline aggregation to use the document count as its input. For example, a derivative can be calculated
on the document count of each bucket, instead of a specific metric:

[source,js]
--------------------------------------------------
Expand All @@ -128,17 +128,16 @@ POST /_search
"interval":"day"
},
"aggs": {
"the_movavg": {
"moving_avg": { "buckets_path": "_count" } <1>
"the_deriv": {
"derivative": { "buckets_path": "_count" } <1>
}
}
}
}
}
--------------------------------------------------
// CONSOLE
// TEST[warning:The moving_avg aggregation has been deprecated in favor of the moving_fn aggregation.]
<1> By using `_count` instead of a metric name, we can calculate the moving average of document counts in the histogram
<1> By using `_count` instead of a metric name, we can calculate the derivative of document counts in the histogram

The `buckets_path` can also use `"_bucket_count"` and path to a multi-bucket aggregation to use the number of buckets
returned by that aggregation in the pipeline aggregation instead of a metric. for example a `bucket_selector` can be
Expand Down
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