elastic/elasticsearch

Allow percentiles_bucket use interpolation

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#51,691 opened on Jan 30, 2020

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 (7 comments) (0 reactions) (0 assignees)Java (76,700 stars) (25,882 forks)batch import
:Analytics/Aggregations>enhancementTeam:Analyticsgood first issuehelp wanted

Description

Change the behavior or add a param to make the percentiles_bucket pipeline aggregation interpolate the result instead of return the nearest value.

The current behaviour is expected as it's properly documented and it was also discussed in the PR that introduced this pipeline (https://github.com/elastic/elasticsearch/pull/13186#discussion_r38412622).

But I find it annoying that the percentils metrics aggregation interpolates the value so both are not consistent.

Contributor guide

Tech stack
java
Domain
backendsearch
Issue type
feature
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
3
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
half day
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
stale
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
clear
Prerequisites
percentiles bucket aggregationJava programmingElasticsearch pipeline aggregations
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
40
Research direction
The change likely involves modifying the PercentilesBucketPipelineAggregation class to add an interpolation parameter. Refer to the discussion in PR #13186 for context. Investigate how the percentiles metric aggregation implements interpolation to maintain consistency.
Allow percentiles_bucket use interpolation · elastic/elasticsearch#51691 | Good First Issue