apache/datafusion

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Apache DataFusion SQL Query Engine

Stars: 9.3k
Forks: 2.4k
Open beginner issues: 0
Indexed issues: 1.8k
Avg merge: 3d 6h
Merged PRs (30d): 363

Dominant language: Rust
License: Apache-2.0
Last GitHub push: Sep 19, 2026
Latest indexed: Sep 14, 2026
Contributing guide: Contributing guide
Code of conduct: Code of conduct
Beginner labels: good first issue help wanted

Beginner friendly Everything

Open All

24 beginner-friendly issues open

`percentile_cont` truncates Float64 interpolation weights to six decimal places Open

bug

Difficulty 2/5 1-3 hours Newbie friendliness 82/100

apache/datafusion#25266 · 2 comments · Opened Sep 13, 2026
CSV null_regex is applied to schema inference but never to the reader, so matching values are not null Open

Difficulty 2/5 1-3 hours Newbie friendliness 84/100

apache/datafusion#25213 · 1 comment · Opened Sep 12, 2026
Document that `date_bin` with an explicit origin drifts an hour across a DST transition Open

documentation

Difficulty 2/5 1-3 hours Newbie friendliness 74/100

apache/datafusion#25168 · 1 comment · Opened Sep 10, 2026
BUG: DELETE with a LIMIT clause ignores the LIMIT and deletes every matching row Open

bug

Difficulty 2/5 1-3 hours Newbie friendliness 86/100

apache/datafusion#24998 · Opened Sep 6, 2026
`datafusion-cli` ignores `datafusion.sql_parser.recursion_limit` Open

Difficulty 2/5 1-3 hours Newbie friendliness 78/100

apache/datafusion#24913 · Opened Sep 3, 2026
Nested `unnest` of a struct reports an internal error ("Assertion failed: struct_allowed") instead of a planning error Open

Difficulty 2/5 1-3 hours Newbie friendliness 85/100

apache/datafusion#24911 · Opened Sep 3, 2026
`avg` over a decimal with a negative scale panics with "attempt to divide by zero" Open

Difficulty 2/5 1-3 hours Newbie friendliness 84/100

apache/datafusion#24898 · Opened Sep 3, 2026
Comparing a decimal with a negative scale to an integer literal panics in `unwrap_cast` Open

Difficulty 2/5 1-3 hours Newbie friendliness 86/100

apache/datafusion#24896 · Opened Sep 3, 2026
`avg` over `Duration` panics with "attempt to add with overflow" in debug builds Open

Difficulty 2/5 1-3 hours Newbie friendliness 78/100

apache/datafusion#24894 · Opened Sep 3, 2026
Displaying a `Date64` scalar of `i64::MIN` panics Open

Difficulty 2/5 1-3 hours Newbie friendliness 84/100

apache/datafusion#24892 · Opened Sep 3, 2026
Test our microbenchmarks as part of CI Open

development-process enhancement

Difficulty 2/5 1-3 hours Newbie friendliness 68/100

apache/datafusion#24868 · Opened Sep 2, 2026
skip expensive ptr chase & comparission in ByteGroupValueBuilder Open

enhancement

Difficulty 2/5 1-3 hours Newbie friendliness 78/100

apache/datafusion#24570 · Opened Aug 22, 2026
CI: extended tests don't run on changes to functions-aggregate / functions-window, which the aggregate and window fuzzers exercise Open

Difficulty 1/5 Under an hour Newbie friendliness 88/100

apache/datafusion#24212 · 1 comment · Opened Aug 10, 2026
Add `cli` label for bugs and PRs? Open

Difficulty 2/5 1-3 hours Newbie friendliness 68/100

apache/datafusion#24021 · Opened Jul 31, 2026
regex_match_dyn (array-array path) does not support Dictionary-encoded needle arrays (SIMILAR TO / ~ operators) Open

Difficulty 2/5 1-3 hours Newbie friendliness 76/100

apache/datafusion#23709 · 6 comments · Opened Jul 20, 2026
Backport workflow-hardening fix (unpinned-uses) to `maint-16.x` Open

Difficulty 1/5 Under an hour Newbie friendliness 88/100

apache/datafusion#23037 · Opened Jun 19, 2026
Spark `round()` on floating-point types diverges from Spark HALF_UP semantics Open

Difficulty 2/5 1-3 hours Newbie friendliness 76/100

apache/datafusion#22812 · Opened Jun 8, 2026
panic: array_repeat list path overflows inner element count multiplication Open

bug

Difficulty 2/5 1-3 hours Newbie friendliness 82/100

apache/datafusion#22219 · 1 comment · Opened May 15, 2026
panic: date_bin overflows scaling extreme Time64(Microsecond) origin Open

bug

Difficulty 2/5 1-3 hours Newbie friendliness 72/100

apache/datafusion#22216 · 1 comment · Opened May 15, 2026
Test failures on branch-53 related to the Arrow version Open

bug

Difficulty 2/5 1-3 hours Newbie friendliness 65/100

apache/datafusion#21790 · Opened Apr 22, 2026
ClickBench run.sh restarts process per try, losing hot-run caches Open

Difficulty 2/5 1-3 hours Newbie friendliness 72/100

apache/datafusion#21696 · 2 reactions · Opened Apr 17, 2026
ArrowBytesMap and ArrowBytesViewMap undercount memory by not accounting for initial hash table allocation Open

bug

Difficulty 2/5 1-3 hours Newbie friendliness 82/100

apache/datafusion#21248 · Opened Mar 30, 2026
Add AI tooling disclosure text to contributor guide and fields to PR templates Open

development-process enhancement

Difficulty 2/5 1-3 hours Newbie friendliness 68/100

apache/datafusion#18095 · 19 comments · 6 reactions · Opened Oct 16, 2025
date_part returning wrong results due to overflows Open

bug

Difficulty 2/5 1-3 hours Newbie friendliness 78/100

apache/datafusion#14738 · 7 comments · Opened Feb 18, 2025

apache/datafusion

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