prestodb/presto

Use @TypeParameter to simplify array_agg aggregation function

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#21,361 opened on Nov 10, 2023

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 (1 comment) (0 reactions) (1 assignee)Java (5,240 forks)batch import
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Description

With the merge of #21316 we can now simplify this aggregation function implementation by using @TypeParameter annotations in the serializer and state factory classes, which means the function can be entirely converted to using the function annotation framework. This will simplify the implementation and improve maintainability.

Contributor guide

Research direction
Familiarize yourself with the @TypeParameter annotation used in Presto's function framework, and review the merged PR #21316 to see the pattern. Then apply it to the array agg aggregation function.
Tech stack
java
Domain
backend
Issue type
Refactor
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.
Half day
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
JavaPresto function annotation framework
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
65