Database connectivity API standard and libraries for Apache Arrow
C-Rank Grade: A (Welcoming) - 67/100
External PR Merge Rate: 79%
Response Time: -
First Timer Success: 90%
apache/arrow-adbc has a recorded first-timer success rate of 90.5%. Repositories ranked A typically provide actionable feedback during code reviews and actively nurture new community contributors.
Maintainers in apache/arrow-adbc respond to incoming external pull requests in approximately 0.0 hours on average. Keeping PRs focused on single tasks and ensuring tests pass helps maintainers review faster.
The C-Rank™ system evaluates GitHub projects on a 0–100 scale using real data: PR merge rates, review turnaround time, active maintainer presence, and first-time contributor success. A score of 67.1 places apache/arrow-adbc in the A tier.
The external contributor pull request merge rate for apache/arrow-adbc is 78.8%, based on public PR activity from non-core contributors.
apache/arrow-adbc currently has 1 active issue(s) tagged with beginner-friendly labels like "good first issue", "beginner", or "up-for-grabs".
Highly welcoming maintainers in apache/arrow-adbc. Prompt code reviews with positive guidance for new contributors.
Average Response Latency
Tracks hours until a maintainer leaves a review, comment, or PR response.
External Acceptance Rate
Percentage of community pull requests successfully merged into main.
First PR Conversion
Rate at which developers submitting their first repository PR succeed.
Show contributors that your repository actively reviews and merges external pull requests.
[](https://getmerged.abhishekco.de/apache/arrow-adbc?utm_source=github&utm_medium=badge)
Historical health & responsiveness evolution
External PR acceptance
First PR success rate
50% receive response in
90% receive response in
Maintainer review activity heatmap & prime window prediction
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Detected: UTC
Maintainers are most responsive around 22:00 UTC (22:00 UTC in your timezone). Recommended submission window is Monday - Wednesday from 22:00 to 02:00 UTC (22:00 - 02:00 UTC local).
Maintainer Strategy: Maintainer Sweet Spot: PRs under 150 lines merge in ~16 hours (96% approval). Large PRs (>500 lines) take ~115 hours (35% approval). Keep your diff compact for rapid review.
What feature or improvement would you like to see? Platform: Windows 11 Coding Language: Python 3.13 I'm using polars with adbc_driver_sqlite package to handle my database. The virtual environment is at some path with Chinese charactors. When I use pl.write_database(..., engine='adbc'), I got adbc_driver_manager.ProgrammingError: NOT_FOUND: [Driver Manager] Could not load \some\path\with\Chinese\charactors\.venv\Lib\site-packages\adbc_driver_sqlite\libadbc_driver_sqlite.so: LoadLibraryExW() failed: (126). This issue disappears if I change the path to a pure ASCII charactor path. I would really appreciate it if this would be improved.
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When evaluating whether to contribute to apache/arrow-adbc, response velocity and maintainer engagement are crucial. GetMerged continuously tracks pull request trajectories, first-comment latency, and code review rounds to help developers avoid submitting pull requests to backlogged repositories.
Currently, maintainers of apache/arrow-adbc acknowledge new external contributions in approximately -. Out of all submitted pull requests from non-core authors in the last 180-day window, 78.8% were successfully merged into the primary branch.
apache/arrow-adbc has a recorded first-timer success rate of 90.5%. Repositories ranked Welcoming typically provide actionable feedback during code reviews and actively nurture new community contributors.
The initial maintainer response time averages ~-. Keeping PRs scoped to single concerns and ensuring CI checks succeed will optimize review turnaround.
The C-Rank™ index scores repositories on a 0 to 100 scale using an objective formula: external PR merge rates, initial response speed, active maintainer count, and first-time contributor retention. A score of 67.1 places apache/arrow-adbc in the Welcoming tier.
The external pull request merge rate is 78.8%. GetMerged isolates non-core community contributions so external developers get an accurate benchmark of PR acceptance probability.
Yes, apache/arrow-adbc currently has 1 active issue(s) tagged with beginner-friendly labels. You can inspect these directly from the repository issues tab.
All metrics displayed for apache/arrow-adbc are automatically retrieved via the public GitHub API and recalculated daily. Insider pull requests submitted by repository owners or organization members are excluded from merge rate calculations to preserve objective external contributor statistics.