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Harden variant decoding

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#3,561 0 comments 0 reactions 0 assignees View on GitHub

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Assessment

Difficulty
4/5
Estimated time
3-5 days
Newbie friendliness
42/100
Issue type
Feature
Clarity
Needs clarification
Activity status
Quiet
Tech stack
java
Domain
data

Research direction

Start by reading org.apache.parquet.variant.Variant and the parquet-variant component, then compare its malformed-input handling with the Arrow variant and review the work in #3481. Done means Java variant decoding is hardened without unnecessary performance cost, with tests that generate malformed files and add them to the Parquet test files.

Written by the indexing model from the issue text.

Description

Type: enhancement
Describe the enhancement requested

org.apache.parquet.variant.Variant is brittle against malformed variants, whereas the arrow variant is very strict and includes an optional deep validate phase

  • Harden the java implementation, where it doesn't impose any performance penalty
  • add tests which can also generate malformed files to add to the parquet test files

The work in #3481 should include some of this or this should be an immediate followon (preferred)

Component(s)

parquet-variant

Dominant language
Java
Stars
3.1k
Forks
1.6k
Avg merge
4d 12h
Merged PRs (30d)
28

Contributor guide

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First steps

  1. Read the whole issue, then the project's contributing guide.
  2. Comment on the issue to say you are picking it up — it saves two people doing the same work.
  3. Fork the repository and make your change on a branch.
  4. Open a pull request that references the issue number.

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