prestodb/presto

Refactor OrcBatchPageSource to use an integer instead of a list of booleans for row position

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#22231 opened on Mar 18, 2024

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 (6 comments) (0 reactions) (0 assignees)Java (15,558 stars) (5,240 forks)batch import
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Description

see discussion on https://github.com/prestodb/presto/pull/22186/f

Contributor guide

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.
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.
fresh
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
needs investigation
Prerequisites
Java programmingUnderstanding of ORC file format
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
30
Research direction
Review the discussion in PR #22186 (linked in the issue) to understand the proposed change. Locate the OrcBatchPageSource class in the Presto codebase and identify where a list of booleans is used for row position. Determine how to replace it with a single integer for efficiency, and ensure all usages and tests are updated accordingly.