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delta_kernel

v0.25.0 Growing

Core crate providing a Delta/Deltalake implementation focused on interoperability with a wide range of query engines.

Apache-2.0 Edition 2021 MSRV 1.88

Quick Verdict

  • โœ“Actively maintained (updated 20d ago)
  • !Pre-1.0: API may have breaking changes
  • โœ“Trusted by 140 crates
  • !Heavy dependency tree (42 direct deps)
  • โœ“Permissive license (Apache-2.0)

Security

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Downloads
3.1M
Dependents
140
Releases
39
Size
1.2MB

Deep Insights

๐Ÿ“‰
Download decline

104.6K downloads in the last 30 days, down 40% from the previous period. May indicate migration to alternatives.

๐Ÿ”—
Moderate adoption

140 crates depend on delta_kernel. Reasonable ecosystem adoption, though not yet a core dependency.

๐Ÿ”ฌ
Pre-1.0 for over a year

Despite being 2+ years old, delta_kernel hasn't reached 1.0 yet. Expect potential API changes between versions.

๐Ÿ“ฆ
Heavy dependency tree

42 direct dependencies. Consider the impact on compile times and supply chain complexity.

๐ŸŒŸ
Used by top crates

Notable dependents include datafusion-server, tansu-schema, delta_kernel_default_engine, delta-funnel, delta-explain. When high-quality crates choose delta_kernel, it's a strong quality signal.

Health Breakdown

Maintenance 21/25

Recency, release consistency, active ratio

Quality 13/25

Yanked ratio, deps, size, maturity, features

Community 9/20

Reverse deps, ownership, ecosystem

Popularity 8/15

Downloads, momentum, growth trend

Documentation 15/15

Docs, repo, license, metadata

Download Trend

Daily downloads ยท last 90 days
4K/day avg-70%
05K10K4/265/146/16/197/77/24

Top Dependents

Version Adoption

v0.19.2
41%
v0.19.0
29%
v0.20.0
19%
v0.23.0
8%
v0.19.1
3%

Release Timeline

10 releasessince 2025
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Feature Flags

arrowarrow-57arrow-58need-arrowtest-utilsprettyprintschema-diffinternal-apiarrow-conversionarrow-expressionintegration-testdeclarative-plansdefault-engine-basecolumn-defaults-in-dev

README

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Maintainers

Dependencies
42
direct dependencies
Dependents
140
crates depend on delta_kernel