apache/arrow

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Apache Arrow is the universal columnar format and multi-language toolbox for fast data interchange and in-memory analytics

Stars: 17.1k
Forks: 4.3k
Open beginner issues: 0
Indexed issues: 2.2k
Avg merge: 3d 20h
Merged PRs (30d): 94

Dominant language: C++
License: Apache-2.0
Last GitHub push: Sep 18, 2026
Latest indexed: Sep 14, 2026
Contributing guide: Contributing guide
Code of conduct: Code of conduct
Beginner labels: good first issue

Beginner friendly Everything

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2,130 open issues indexed

Undefined Reference to arrow::ImportRecordBatchReader Open

Difficulty 4/5 3-5 days Newbie friendliness 28/100

apache/arrow#14020 · 1 comment · Opened Sep 1, 2022
[C++][FlightRPC] Inconsistent use of int, int32_t, uint32_t for SqlInfo enum values Open

Component: C++ Component: FlightRPC Type: bug

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

apache/arrow#20388 · 1 comment · Opened Aug 29, 2022
[C++] Adopt C++17 idioms and features for maintainability Open

Component: C++ Type: task

Difficulty 5/5 Over a week Newbie friendliness 30/100

apache/arrow#32800 · 6 comments · Opened Aug 29, 2022
How to retrieve server logs and query progress in Flight SQL Open

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

apache/arrow#13988 · 1 comment · Opened Aug 29, 2022
[R] Substantial RAM use increase in 9.0.0 release on write_dataset() Open

Component: R Priority: Critical Type: bug

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

apache/arrow#32795 · 12 comments · Opened Aug 26, 2022
[Python] Can not refer to field in a list of structs Open

Component: Python Type: bug

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

apache/arrow#32794 · 2 comments · Opened Aug 26, 2022
[C++][Java] Arrow Flight C++/Java performance comparison Open

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

apache/arrow#13980 · 20 comments · 1 reaction · Opened Aug 26, 2022
[Python] List<Extension> arrays aren't supported in to_pandas calls Open

Component: C++ Component: Python Type: bug

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

apache/arrow#32791 · 5 comments · Opened Aug 26, 2022
What is the correct way to use IPC if you implement your own IO layer? Open

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

apache/arrow#13978 · 4 comments · Opened Aug 25, 2022
[Go] add method on Array interface Open

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

apache/arrow#13977 · 1 comment · Opened Aug 25, 2022
Expose min_value/max_value when min/max for row group is empty Open

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

apache/arrow#13976 · 3 comments · 1 reaction · Opened Aug 25, 2022
Sys.setenv(ARROW_WITH_ZSTD = "ON") not working for install.packages("arrow") Open

Type: bug

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

apache/arrow#32780 · 1 reaction · Opened Aug 25, 2022
Substrait SetRel Open

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

apache/arrow#13967 · 2 comments · Opened Aug 24, 2022
[C++] Pretty Printing for RLE arrays Open

Type: task

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

apache/arrow#20380 · 1 comment · Opened Aug 24, 2022
Java encode int64 using delta and use golang to decode Open

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

apache/arrow#13961 · 1 comment · Opened Aug 24, 2022
[C++][Parquet] Skip method skips levels and not rows for repeated fields Open

Component: C++ Component: Parquet Priority: Major Type: bug

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

apache/arrow#42995 · 1 comment · Opened Aug 23, 2022
[Python][C++] pyarrow parquet writer - missing time logical type Open

Component: C++ Component: Parquet Component: Python Type: bug

Difficulty 4/5 3-5 days Newbie friendliness 45/100

apache/arrow#32766 · 5 comments · Opened Aug 23, 2022
[java] reading multiple parquet files takes unresonable amount of memory Open

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

apache/arrow#13949 · 4 comments · Opened Aug 23, 2022
[C++] Adding Fetch Node ToProto Open

Type: task

Difficulty 3/5 1-2 days Newbie friendliness 25/100

apache/arrow#32764 · 1 comment · Opened Aug 23, 2022
[C++][Flight] Segmentation fault on arrow-flight-integration-test on nightly failure Open

Component: C++ Component: FlightRPC Type: bug

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

apache/arrow#32754 · 2 comments · Opened Aug 22, 2022
[C++] Substrait to Arrow Aggregate doesn't take the provided Output Type for aggregates Open

Component: C++ Type: bug

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

apache/arrow#20376 · 6 comments · Opened Aug 20, 2022
Failure to parse files that can be parsed on pyarrow. Also, failure to recover from crash Open

Type: bug

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

apache/arrow#32732 · Opened Aug 18, 2022
[Docs] Clarify processes for first-time contributors Open

Component: C++ Component: Documentation Component: Go Component: Python Component: R Type: task

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

apache/arrow#32712 · 3 comments · Opened Aug 17, 2022
[R][C++] Scalar UDFs don't actually deal with scalars Open

Component: C++ Component: R Type: bug

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

apache/arrow#32704 · 1 comment · Opened Aug 16, 2022
Hi there, Which git commit of flatbuffer is used in arrow? will it change often? Open

Difficulty 1/5 Under an hour Newbie friendliness 20/100

apache/arrow#13891 · 2 comments · Opened Aug 16, 2022
[R] Microsecond is not sufficient unit for POSIXct Open

Component: R Type: enhancement

Difficulty 4/5 3-5 days Newbie friendliness 48/100

apache/arrow#32693 · 4 comments · Opened Aug 15, 2022
C++20 compile arrow get `operator==` ambiguous Open

Component: C++ Type: bug

Difficulty 2/5 1-3 hours Newbie friendliness 25/100

apache/arrow#32677 · 1 comment · Opened Aug 15, 2022
[Gandiva] How to support overflow check and throw an exception in LLVM? Open

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

apache/arrow#13870 · Opened Aug 13, 2022
pyarrow may use a lot of memory to load a dataframe from parquet Open

Component: Parquet Component: Python Type: bug

Difficulty 4/5 3-5 days Newbie friendliness 45/100

apache/arrow#32670 · 10 comments · Opened Aug 12, 2022
[C++][Dataset] Allow creating FileSystemDataset with FileInfoGenerator as a source Open

Type: task

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

apache/arrow#32667 · 1 comment · Opened Aug 12, 2022
[Python] pyarrow large integer conversion Open

Type: bug

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

apache/arrow#32664 · 2 comments · Opened Aug 12, 2022
[C++][Docs] Create tutorial content for Acero Open

Component: C++ Component: Documentation Type: task

Difficulty 3/5 1-2 days Newbie friendliness 30/100

apache/arrow#32651 · Opened Aug 10, 2022
[C++][Docs] Create tutorial content for basic Flight usage Open

Component: C++ Component: Documentation Type: task

apache/arrow#32650 · 2 comments · 1 assignee · Opened Aug 10, 2022
[C++][Docs] Create a 10 minutes to Arrow article Open

Component: C++ Component: Documentation Type: task

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

apache/arrow#32648 · Opened Aug 10, 2022
[C++][Docs] Create installation instructional documentation in Sphinx Open

Component: C++ Component: Documentation Type: task

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

apache/arrow#32647 · Opened Aug 10, 2022
Arrow Flight memory management Open

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

apache/arrow#13837 · 7 comments · Opened Aug 10, 2022
How to read a subset of columns from arrow ipc format file the fastest way? Open

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

apache/arrow#13827 · 9 comments · Opened Aug 9, 2022
[C++] ORC in build breaks code using Arrow and not ORC -- not reproducible Open

Component: C++ Type: bug

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

apache/arrow#32618 · 3 comments · Opened Aug 8, 2022
[Python] Type checking support Open

Component: Python Type: enhancement

apache/arrow#32609 · 39 comments · 28 reactions · 1 assignee · Opened Aug 8, 2022
[C++] Unsupported cast using function cast_struct Open

Component: C++ Type: bug

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

apache/arrow#32607 · 1 comment · Opened Aug 8, 2022
[Python] Parquet should be listed in PyArrow's get_libraries() function Open

Component: Python Type: bug

Difficulty 2/5 1-3 hours Newbie friendliness 25/100

apache/arrow#32603 · 5 comments · Opened Aug 5, 2022
Get the table schema as json? Open

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

apache/arrow#13803 · 9 comments · 2 reactions · Opened Aug 5, 2022
[cpp][parquet] Segmentation fault when open parquet file Open

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

apache/arrow#13801 · 9 comments · Opened Aug 5, 2022
[C++] Vendor backward for better stack traces Open

Component: C++ Type: bug

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

apache/arrow#32588 · 1 comment · Opened Aug 4, 2022
[Release] Update remove old artifacts release script Open

Component: Developer Tools Type: bug

apache/arrow#32572 · 11 comments · 1 assignee · Opened Aug 3, 2022
[C++] Create fragment scanners for csv/parquet/orc/ipc Open

Component: C++ Type: task

apache/arrow#32566 · 3 comments · 1 assignee · Opened Aug 2, 2022
How to save org.apache.arrow.vector.VectorSchemaRoot into parquet file in Java API Open

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

apache/arrow#13759 · 3 comments · Opened Jul 31, 2022
[Release] Java jars verification pass despite that nothing has been uploaded Open

Component: Developer Tools Type: bug

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

apache/arrow#32542 · 1 comment · Opened Jul 29, 2022
[Python] group_by functionality directly on large dataset, instead of on a table? Open

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

apache/arrow#13747 · 15 comments · 2 reactions · Opened Jul 29, 2022
Holder instances are returned with null buffer Open

Difficulty 3/5 1-2 days Newbie friendliness 30/100

apache/arrow#13721 · 4 comments · Opened Jul 27, 2022

apache/arrow

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