apache/arrow-java

`ComplexCopier` missing support for FixedSizeBinary columns

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#559 opened on Jan 24, 2025

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 (4 comments) (1 reaction) (0 assignees)Java (132 forks)auto 404
Type: enhancementgood first issuehelp wanted

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Description

Complex copier does not support fixed size binary.

java.lang.UnsupportedOperationException: FIXEDSIZEBINARY
	at org.apache.arrow.vector.complex.impl.ComplexCopier.getListWriterForReader(ComplexCopier.java:824)
	at org.apache.arrow.vector.complex.impl.ComplexCopier.writeValue(ComplexCopier.java:93)
	at org.apache.arrow.vector.complex.impl.ComplexCopier.copy(ComplexCopier.java:76)
	at org.apache.arrow.vector.complex.ListVector.copyFrom(ListVector.java:409)

Contributor guide

Research direction
Inspect the ComplexCopier class, specifically the getListWriterForReader method, and add a case for FixedSizeBinary type by following the pattern of handling similar fixed width types like FixedSizeBinaryVector.
Tech stack
java
Domain
backend
Issue type
Bug
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.
Active
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
Clear
Prerequisites
Java
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
75