elastic/elasticsearch

[Transform] add support for extended_stats and string_stats aggregations

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#51,925 opened on Feb 5, 2020

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 (5 comments) (0 reactions) (1 assignee)Java (76,700 stars) (25,882 forks)batch import
:ml/Transform>enhancementTeam:MLhelp wanted

Description

#51808 added the groundwork for multi value aggregations in general and added percentiles support.

More multi value aggregations should be supported:

  • stats
  • extended stats
  • string stats

Contributor guide

Tech stack
java
Domain
data
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.
1-2 days
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
Understanding of Elasticsearch transformsKnowledge of aggregations in Elasticsearch
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
30
Research direction
Review PR #51808 which added percentiles support as a model for multi value aggregations. Examine the existing transform code for stats aggregation to understand the pattern. Then implement extended stats and string stats aggregations following the same approach. Check issue comments for any additional context or edge cases.