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 (25,882 forks)batch import
:Analytics/Aggregations>enhancementTeam:Analyticsgood first issuehelp wanted

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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

Research direction
Examine the implementation of percentiles bucket aggregation in Elasticsearch. Understand how the current nearest rank method works and identify where to add an interpolation parameter. Look at the percentiles metrics aggregation for reference on interpolation logic.
Tech stack
java
Domain
backend
Issue type
Feature
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
2
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
1-3 hours
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
Active
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
Clear
Prerequisites
Java
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
65