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 20, 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

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1,799 open issues indexed

Wrap LexRequirement, LexOrdering into their own struct Open

enhancement

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

apache/datafusion#8026 · Opened Nov 2, 2023
Incorrect result when use volatile function alias in having clause Open

bug

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

apache/datafusion#7976 · 3 comments · Opened Oct 30, 2023
Consolidate interval analysies from `Interval` and `PruningPredicate` Open

enhancement

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

apache/datafusion#7887 · 8 comments · Opened Oct 20, 2023
[EPIC] A collection of Interval arithmetic (not Intervals of time) improvements Open

enhancement PROPOSAL EPIC

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

apache/datafusion#7882 · 6 comments · Opened Oct 20, 2023
Don't error on unknown column when pruning if predicate can still be proven false Open

enhancement

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

apache/datafusion#7869 · 13 comments · 1 reaction · Opened Oct 19, 2023
Spatial data support Open

enhancement

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

apache/datafusion#7859 · 18 comments · 4 reactions · Opened Oct 18, 2023
Any plan to support JSON or JSONB? Open

enhancement

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

apache/datafusion#7845 · 41 comments · 6 reactions · Opened Oct 17, 2023
Reading Avro files supports other types Open

enhancement

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

apache/datafusion#7828 · 5 comments · 1 reaction · Opened Oct 16, 2023
Remove `Wildcard` from `Expr` Open

enhancement

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

apache/datafusion#7765 · 8 comments · Opened Oct 7, 2023
Improve `verify benchmark results` time (even) more by using debug (rather than release) build Open

enhancement

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

apache/datafusion#7709 · 1 comment · Opened Oct 1, 2023
avro_to_arrow: Support in memory apache_avro Value's Open

enhancement

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

apache/datafusion#7690 · 7 comments · 2 reactions · Opened Sep 28, 2023
Substrait: Support expression serialization Open

enhancement substrait

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

apache/datafusion#7687 · 2 reactions · Opened Sep 28, 2023
Materialize Dictionaries in Group Keys Open

enhancement

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

apache/datafusion#7647 · 15 comments · 2 reactions · Opened Sep 25, 2023
CREATE TABLE DDL does not save correct schema, resulting in mismatched plan vs execution (record batch) schema Open

bug

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

apache/datafusion#7636 · 8 comments · Opened Sep 24, 2023
New Signature concept Open

enhancement

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

apache/datafusion#7580 · 2 comments · 1 reaction · Opened Sep 16, 2023
Mismatch in timestamp format between dataframe and recordbatch when read from a delta table Open

bug

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

apache/datafusion#7564 · 4 comments · Opened Sep 15, 2023
Statistic: data_size should be in ColumnStatistics. Open

enhancement

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

apache/datafusion#7548 · 2 comments · Opened Sep 13, 2023
SQL Logical Plan Drops ordering within UDAFs Open

bug

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

apache/datafusion#7531 · 4 comments · Opened Sep 12, 2023
Remove ScalarValue Ord / PartialOrd Open

enhancement

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

apache/datafusion#7517 · Opened Sep 10, 2023
Enabling `datafusion.explain.show_statistics` by default Open

enhancement

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

apache/datafusion#7504 · Opened Sep 8, 2023
[DISCUSSION] Should we implement access control hooks in DataFusion? Open

enhancement

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

apache/datafusion#7501 · 6 comments · 4 reactions · Opened Sep 7, 2023
Support Glob Expressions for S3 Open

enhancement

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

apache/datafusion#7393 · 6 comments · 1 reaction · Opened Aug 24, 2023
Document non-deterministic ordering of joining, group by, etc. Open

documentation

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

apache/datafusion#7373 · 8 comments · Opened Aug 22, 2023
Reduce Recompilation When Switching Crates Open

enhancement

Difficulty 5/5 Over a week Newbie friendliness 28/100

apache/datafusion#7370 · Opened Aug 22, 2023
Improve DataFusion error handling Open

enhancement

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

apache/datafusion#7360 · 1 comment · 5 reactions · Opened Aug 21, 2023
alter_fp_rounding_mode Is Not Panic Safe Open

bug

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

apache/datafusion#7356 · Opened Aug 21, 2023
Make ScalarValue an ArrayRef Wrapper Open

enhancement

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

apache/datafusion#7353 · 14 comments · 2 reactions · Opened Aug 21, 2023
Library Guide: Extending DataFusion's operators: custom LogicalPlan and `ExecutionPlans` Open

documentation enhancement

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

apache/datafusion#7308 · 4 comments · 2 reactions · Opened Aug 16, 2023
Library Guide: Add SQL level user guide: Open

documentation enhancement

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

apache/datafusion#7302 · 4 comments · Opened Aug 16, 2023
Decimal division compatibility mode with spark Open

enhancement

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

apache/datafusion#7301 · 1 comment · Opened Aug 16, 2023
Support timestamp literals with precision specifier Open

enhancement

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

apache/datafusion#7249 · 6 comments · Opened Aug 9, 2023
Optimizer `push_down_projection` failed due to different schemas Open

bug

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

apache/datafusion#7241 · 10 comments · Opened Aug 9, 2023
Implement `array_aggregate` function Open

enhancement

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

apache/datafusion#7213 · Opened Aug 7, 2023
[EPIC] A collection of `Sort + Limit` / `Top K` optimizations Open

enhancement PROPOSAL EPIC

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

apache/datafusion#7195 · 1 reaction · Opened Aug 4, 2023
Improve performance of large sorts with Cascaded merge / tree Open

enhancement

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

apache/datafusion#7181 · 1 comment · Opened Aug 2, 2023
Convert Expr to a parsable representation Open

enhancement

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

apache/datafusion#7165 · 6 comments · Opened Aug 1, 2023
Repartitioning by RoundRobinBatch(n) does not result in at least n batches for CSV sources Open

bug

Difficulty 3/5 1-2 days Newbie friendliness 38/100

apache/datafusion#7145 · 1 comment · Opened Jul 30, 2023
`make_array` should support pure null array Open

bug

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

apache/datafusion#7144 · 3 comments · Opened Jul 30, 2023
Improve handling of `NULL` and empty array for array functions. Open

enhancement

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

apache/datafusion#7143 · 1 comment · Opened Jul 30, 2023
All array functions should represent `NULL` as an element Open

enhancement

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

apache/datafusion#7142 · 15 comments · Opened Jul 30, 2023
Support all array operators to work with columns Open

enhancement

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

apache/datafusion#7119 · 4 comments · Opened Jul 27, 2023
Enhance Interval arithmetic to support String type. Open

enhancement

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

apache/datafusion#7098 · 7 comments · Opened Jul 26, 2023
Allow providing file schema for parquet files Open

enhancement

Difficulty 3/5 1-2 days Newbie friendliness 38/100

apache/datafusion#7067 · 1 comment · Opened Jul 24, 2023
Use Row Format in SortExec Open

enhancement

apache/datafusion#7053 · 5 comments · 1 assignee · Opened Jul 21, 2023
Write a case study about using DataFusion Open

enhancement

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

apache/datafusion#7015 · 4 comments · 1 reaction · Opened Jul 18, 2023
[Epic] Better / Improved Documentation, Tutorials and Examples Open

enhancement EPIC

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

apache/datafusion#7013 · 4 comments · 2 reactions · Opened Jul 18, 2023
Multi-field structs from builtin scalar fn incompatible with UDAF Open

bug

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

apache/datafusion#7012 · 4 comments · Opened Jul 18, 2023
Improve RepartitionExec for better query performance Open

enhancement

apache/datafusion#7001 · 26 comments · 9 reactions · 1 assignee · Opened Jul 17, 2023
[EPIC] (Even More) Grouping / Group By / Aggregation Performance Open

enhancement PROPOSAL EPIC

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

apache/datafusion#7000 · 12 comments · Opened Jul 17, 2023
Lock free MPSC channel for RepartitionExec Open

enhancement

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

apache/datafusion#6928 · Opened Jul 12, 2023

apache/datafusion

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