trinodb/trino

Update presto-record-decoder and dependent modules to use Optional

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#1,610 opened on Sep 30, 2019

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 (3 comments) (0 reactions) (0 assignees)Java (9,113 stars) (2,678 forks)batch import
good first issuemaintenance

Description

Variables such as getFormatHint in DecoderColumnHandle can be null, we should change them to optional

Contributor guide

Tech stack
java
Domain
backenddatabase
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.
1-3 hours
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
JavaOptional APITrino codebase structure
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
60
Research direction
Look at the DecoderColumnHandle interface in the presto record decoder module. Identify all methods that return null for getFormatHint and similar properties. Change their return type to Optional and update all callers across dependent modules to handle Optional appropriately. Ensure no breaking changes to existing API consumers.