apache/arrow-julia

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Official Julia implementation of Apache Arrow

Stars: 314
Forks: 78
Open beginner issues: 0
Indexed issues: 97

Dominant language: Julia
License: Apache-2.0
Last GitHub push: Jul 21, 2026
Latest indexed: Sep 14, 2026
Contributing guide: No contributing guide
Code of conduct: Code of conduct
Beginner labels: No beginner labels indexed
PR merge metrics: No merged PRs in 30d

Beginner friendly Everything

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`Arrow.Table` uses last dictionary for all batches in streaming decode, resulting in incorrect reads Open

Difficulty 4/5 3-5 days Newbie friendliness 55/100

apache/arrow-julia#610 · Opened Sep 7, 2026
Failed to compile the Arrow package using JuliaC Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

apache/arrow-julia#597 · Opened Jun 5, 2026
BoundsError: attempt to access 0-element Vector{Vector{UInt8}} at index [1] Open

Difficulty 3/5 1-2 days Newbie friendliness 55/100

apache/arrow-julia#590 · Opened Mar 20, 2026
de / serialization of a CartesianIndex Open

Difficulty 3/5 1-2 days Newbie friendliness 58/100

apache/arrow-julia#589 · 2 comments · Opened Mar 18, 2026
Test failures with CategoricalArrays 1.0 Open

Difficulty 3/5 1-2 days Newbie friendliness 35/100

apache/arrow-julia#586 · 2 comments · Opened Feb 4, 2026
`Arrow.Stream` not working with non-seekable I/O e.g. FIFOs and sockets Open

Difficulty 4/5 3-5 days Newbie friendliness 42/100

apache/arrow-julia#580 · Opened Dec 10, 2025
Sparse Tensor Support Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

apache/arrow-julia#565 · Opened Sep 1, 2025
Dense Tensor support Open

Difficulty 5/5 Over a week Newbie friendliness 35/100

apache/arrow-julia#564 · 1 reaction · Opened Sep 1, 2025
use Aqua.jl in Arrow and ArrowTypes tests Open

Difficulty 3/5 1-2 days Newbie friendliness 42/100

apache/arrow-julia#538 · 1 comment · Opened Dec 9, 2024
Add support for FileIO Open

Difficulty 3/5 1-2 days Newbie friendliness 35/100

apache/arrow-julia#507 · 2 comments · Opened May 27, 2024
Deserialization as Vector{SubArray} breaks `push!` on DataFrame Open

Difficulty 4/5 3-5 days Newbie friendliness 25/100

apache/arrow-julia#506 · 7 comments · 1 reaction · Opened May 23, 2024
Deeply nested structs cause long compilation times Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

apache/arrow-julia#503 · 9 comments · Opened Mar 18, 2024
Cannot append DictEncode columns to Stream Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

apache/arrow-julia#501 · Opened Mar 11, 2024
Type instability in getcolumn Open

Difficulty 4/5 3-5 days Newbie friendliness 38/100

apache/arrow-julia#499 · Opened Feb 5, 2024
Unexpected allocations Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

apache/arrow-julia#496 · 2 comments · 1 reaction · Opened Jan 22, 2024
copy does not copy to standard Julia Types Open

Difficulty 3/5 1-2 days Newbie friendliness 35/100

apache/arrow-julia#495 · 5 comments · Opened Jan 18, 2024
support Dates.CompoundPeriod in deserialization? Open

Difficulty 3/5 1-2 days Newbie friendliness 45/100

apache/arrow-julia#494 · 1 reaction · Opened Jan 15, 2024
colmetadata does not read custom metadata with multiple writes Open

Difficulty 3/5 1-2 days Newbie friendliness 52/100

apache/arrow-julia#485 · 2 comments · Opened Sep 12, 2023
Custom type cannot round trip (Colors.jl) Open

Difficulty 3/5 1-2 days Newbie friendliness 35/100

apache/arrow-julia#484 · 1 comment · Opened Aug 30, 2023
[feature request] support run-end encoded layout Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

apache/arrow-julia#476 · 1 reaction · Opened Jul 26, 2023
Arrow stream writer and reader implementation questions Open

Difficulty 5/5 Over a week Newbie friendliness 20/100

apache/arrow-julia#475 · Opened Jul 10, 2023
Bus errors when writing `DataFrame` Open

Difficulty 4/5 3-5 days Newbie friendliness 25/100

apache/arrow-julia#474 · 8 comments · Opened Jul 3, 2023
explanation of Arrow.Stream vs. Arrow.Table seems ambiguous Open

Difficulty 3/5 1-2 days Newbie friendliness 45/100

apache/arrow-julia#472 · 3 comments · Opened Jul 2, 2023
html comment tag at the top of main documentation page may have one too many dashes at the beginning Open

Difficulty 1/5 Under an hour Newbie friendliness 55/100

apache/arrow-julia#471 · 2 reactions · Opened Jul 2, 2023
Writing and Reading Random Access Files Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

apache/arrow-julia#434 · 5 comments · Opened May 4, 2023
`NTuple{UInt8}` not getting correctly written out Open

Difficulty 3/5 1-2 days Newbie friendliness 35/100

apache/arrow-julia#427 · 3 comments · Opened Apr 13, 2023
`Arrow.write()` cannot handle large `Mmap`-ed table Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

apache/arrow-julia#413 · 1 reaction · Opened Apr 3, 2023
Missing type gets lost when writing partitions of DataFrame Open

Difficulty 3/5 1-2 days Newbie friendliness 45/100

apache/arrow-julia#403 · 2 comments · Opened Mar 12, 2023
[Docs] Add developer documentation like in CSV.jl Open

Difficulty 5/5 Over a week Newbie friendliness 35/100

apache/arrow-julia#402 · 1 reaction · Opened Mar 12, 2023
[Docs] Improve documentation around partitions/multithreading Open

Difficulty 3/5 1-2 days Newbie friendliness 35/100

apache/arrow-julia#401 · 1 reaction · Opened Mar 12, 2023
Benchmark of Arrow.jl vs Pyarrow (/Polars) Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

apache/arrow-julia#393 · 5 comments · 2 reactions · Opened Mar 9, 2023
Nullable fields don't always need Union{Missing, T} Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

apache/arrow-julia#384 · 2 comments · 1 reaction · Opened Jan 27, 2023
Addtional `Missing` gets injected into Schema Open

Difficulty 3/5 1-2 days Newbie friendliness 35/100

apache/arrow-julia#373 · 3 comments · Opened Jan 6, 2023
Creating DictEncoded in the presence of missing values Open

Difficulty 3/5 1-2 days Newbie friendliness 48/100

apache/arrow-julia#360 · 2 comments · Opened Nov 9, 2022
Arrow changes data type from input in unexpected ways Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

apache/arrow-julia#359 · 2 comments · Opened Nov 7, 2022
Add an indexable variant of Arrow.Stream Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

apache/arrow-julia#353 · 7 comments · Opened Oct 30, 2022
Feather file with compression and larger than RAM Open

Difficulty 5/5 Over a week Newbie friendliness 35/100

apache/arrow-julia#340 · 3 comments · Opened Oct 6, 2022
Support DataAPI.jl metadata API Open

Difficulty 3/5 1-2 days Newbie friendliness 35/100

apache/arrow-julia#337 · 3 comments · 1 reaction · Opened Sep 20, 2022
Inconsistent handling of eltype Decimals.Decimal (with silent errors?) Open

Difficulty 3/5 1-2 days Newbie friendliness 35/100

apache/arrow-julia#335 · Opened Sep 5, 2022
Streaming: Pyarrow is 15 times faster than Arrow.jl Open

Difficulty 4/5 3-5 days Newbie friendliness 30/100

apache/arrow-julia#334 · Opened Sep 4, 2022
Can't round-trip integer CategoricalArrays Open

Difficulty 3/5 1-2 days Newbie friendliness 35/100

apache/arrow-julia#333 · Opened Sep 1, 2022
Difficulties trying to serialize to Union types Open

Difficulty 4/5 3-5 days Newbie friendliness 25/100

apache/arrow-julia#332 · Opened Aug 24, 2022
DictEncode a DictEncode Open

Difficulty 2/5 1-3 hours Newbie friendliness 45/100

apache/arrow-julia#331 · Opened Aug 18, 2022
Show Map example in documentation? Open

Difficulty 3/5 1-2 days Newbie friendliness 35/100

apache/arrow-julia#330 · Opened Aug 11, 2022
`fromarrow` dispatch for `::Type{Union{Missing, T}}` is broken when `T` is parametric Open

Difficulty 3/5 1-2 days Newbie friendliness 48/100

apache/arrow-julia#328 · Opened Jul 19, 2022
write fails on large dataframes Open

Difficulty 3/5 1-2 days Newbie friendliness 45/100

apache/arrow-julia#326 · Opened Jun 21, 2022
[ArrowTypes] add `@arrow_record`? Open

Difficulty 5/5 Over a week Newbie friendliness 35/100

apache/arrow-julia#323 · Opened May 17, 2022
(de)serialization of (U)Int128 Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

apache/arrow-julia#319 · 2 reactions · Opened Apr 28, 2022
Arrow Table doesn't implement `==` for value equality Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

apache/arrow-julia#310 · 1 comment · 1 reaction · Opened Mar 28, 2022
Issues with changes in scopedenums introduced in 2.2.1 Open

Difficulty 4/5 3-5 days Newbie friendliness 42/100

apache/arrow-julia#308 · 1 comment · Opened Mar 17, 2022

apache/arrow-julia

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