apache/datafusion
Apache DataFusion SQL Query Engine
In plain words
Outside PRs: 8 in 10 merged. First reply usually within 28 h. 1 starter issue is available now.
Outside PRs merged
83%
844 merged, 174 closed, 153 still open
Higher than 49% of 559 other measured repositories
First human reply
28 h
median of 1171 outside PRs, 140 unanswered
Time to merge
7 days
844 of 1171 outside PRs merged
Outside PRs opened 30 to 120 days ago, so each has had time to be answered. A figure needs at least 5 pull requests, otherwise it reads "Not enough data". How this is calculated · A number looks wrong?
Your first steps here
If you have never contributed to this project, do these in order.
- 1
Read the contributing guide
It says how to set the project up and what the maintainers expect in a pull request.
Open the guide - 2
Take this free issue
[BUG] Error when adding Date32 and Int64
Open issue #12342 - 3
Know where to ask
Questions go to the project's discord, or on the issue itself. Not in private messages.
Open it - 4
Sign the contributor agreement
A bot will ask you to sign a contributor licence agreement on your first pull request. It takes a minute.
- 5
Open a small pull request
Link the issue in it. A first reply here usually takes 28 h; until then, silence is normal.
What happens to an outside pull request
Every pull request opened by someone outside the core team, 30 to 120 days ago.
- Opened by outsiders1,171100%
- Got a human reply1,03188%
- Merged84472%
Time to first reply
After 2 days, 58% of outside PRs had a reply from a person. After a week, 77%. Bots do not count.
The last 52 weeks
Steady. Median first reply was 46 h over the last four weeks (537 PRs) and 33 h over the four before (477 PRs).
Starter issues
Issues labelled for beginners, with their real state. Available means open, unassigned, no linked pull request, nobody has claimed it in the last 14 days, and it was updated in the last 60 days.
- Available
- 1
- Claimed
- 10
- Has a pull request
- 13
- Stale
- 1
- Claimedupdate data type equality in code base to use semantic_equality in `arrow-rs/arrow-schema` instead#24760
- Has a pull requestchore: Explore combining `SessionConfig` and `RuntimeConfig` into same framework#23322
- ClaimedPostgreSQL compatibility: `round(float8)` should match PostgreSQL half-tie behavior
When replies arrive
All maintainers counted together. Shown only when at least 3 people replied in the last 90 days, so it never describes one person.
Replies are most likely between 20:00 and 23:00 (India time).
Show as table
| Hour (India time) | Replies, all weekdays |
|---|---|
| 00:00 | 20 |
| 01:00 | 20 |
| 02:00 | 17 |
| 03:00 | 10 |
| 04:00 | 5 |
| 05:00 | 6 |
| 06:00 | 10 |
| 07:00 | 11 |
| 08:00 | 11 |
| 09:00 | 16 |
| 10:00 | 22 |
| 11:00 | 18 |
| 12:00 | 14 |
| 13:00 | 23 |
| 14:00 | 33 |
| 15:00 | 29 |
| 16:00 | 26 |
| 17:00 | 34 |
| 18:00 | 42 |
| 19:00 | 38 |
| 20:00 | 38 |
| 21:00 | 43 |
| 22:00 | 40 |
| 23:00 | 30 |
How to start
- Contributing guidefound
- Code of conductfound
- Issue templatesfound
- Dev container for one-step setupfound
- A contributor licence agreement must be signed before a pull request is merged.
Where the project talks
Activity
- Commits, 90 days
- 1,221
- Releases, 12 months
- 0
- Active maintainers
- 48
- Last push
- 10 Oct 2026
Stack
Badge and feed
Two ways to use these figures outside this page.
For maintainers: a README badge
Shows newcomers how quickly this project answers and how often it merges. Paste the line into your README; the badge updates with the index.
[](https://contributable.vercel.app/repo/apache/datafusion)[](https://contributable.vercel.app/repo/apache/datafusion)For contributors: follow new issues
Add the feed to a feed reader (Feedly, Inoreader, Thunderbird) and you hear about new free starter issues here without checking the site.
https://contributable.vercel.app/feed/repo/apache/datafusionFor developers: every figure on this page as JSON at /api/v1/repos/apache/datafusion.
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