delta-io/delta-kernel-rs

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A native Delta implementation for integration with any query engine

Stars: 361
Forks: 214
Open beginner issues: 0
Indexed issues: 472
Avg merge: 2d 13h
Merged PRs (30d): 81

Dominant language: Rust
License: Apache-2.0
Last GitHub push: Sep 14, 2026
Latest indexed: Sep 15, 2026
Contributing guide: Contributing guide
Code of conduct: No code of conduct
Beginner labels: good first issue

Open All

471 open issues indexed

Settle on the data type for table paths, and enforce it properly Open

delta-io/delta-kernel-rs#66 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Kernel should allow engine to provide its own data skipping predicate implementation Open

delta-io/delta-kernel-rs#85 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Handle nested columns Open

delta-io/delta-kernel-rs#86 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Validate type coercion rules in default client kernels. Open

delta-io/delta-kernel-rs#87 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Leverage `Scalar` / `Datum` in default client Open

delta-io/delta-kernel-rs#88 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Handle null columns and column selection for nested fields when reading parquet files Open

delta-io/delta-kernel-rs#96 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
The json and parquet handler API should include kernel-specific state Open

delta-io/delta-kernel-rs#97 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Must apply log replay dedup before file skipping Open

delta-io/delta-kernel-rs#99 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
FFI is not prod-safe until `c_unwind` RFC stabilizes and we can use it Open

delta-io/delta-kernel-rs#113 · 3 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
switch to passing owned lists of files in file passing api Open

delta-io/delta-kernel-rs#116 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Follow-up for visitors to be more ergonomic / compact Open

delta-io/delta-kernel-rs#120 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
assert that sizeof(usize) >= sizeof(u64) Open

delta-io/delta-kernel-rs#124 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Sort out formatting issues with errors Open

delta-io/delta-kernel-rs#127 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Need to fix aws credentials Open

delta-io/delta-kernel-rs#136 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Use `thiserror` backtrace facilities when available on stable Open

delta-io/delta-kernel-rs#157 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
split ffi/src/lib.rs into multiple modules Open

good first issue

delta-io/delta-kernel-rs#160 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
proc macro for ffi::KernelError Open

delta-io/delta-kernel-rs#161 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
testing/building documentation for FFI crate Open

delta-io/delta-kernel-rs#163 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
consider rename subdirectories to match crate names Open

delta-io/delta-kernel-rs#167 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
things like size and modified time should be unsigned types in actions Open

delta-io/delta-kernel-rs#174 · 3 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
proper schema handling between delta log and parquet Open

delta-io/delta-kernel-rs#179 · 1 comment · 0 reactions · 1 assignee · Indexed Sep 15, 2026
Consider using `derive-new` and/or just making pub struct members for trivial structs Open

delta-io/delta-kernel-rs#181 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Decide on `NonNull` vs raw pointers. Open

delta-io/delta-kernel-rs#184 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
(Probably) `impl<T: AsRef<[u8]>> From<T> for KernelStringSlice` Open

delta-io/delta-kernel-rs#185 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
ParquetOpener and PresignedUrlOpener are highly redundant Open

delta-io/delta-kernel-rs#200 · 2 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Get the right name everywhere for array element types and map key/values types Open

delta-io/delta-kernel-rs#202 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
move ffi testing to use the more complete example and add windows Open

delta-io/delta-kernel-rs#214 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Can't always find partition constants in map Open

delta-io/delta-kernel-rs#232 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Make kernel FFI visitor functions nullable Open

delta-io/delta-kernel-rs#236 · 2 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Unnecessary type_name field in StructType/ArrayType/MapType? Open

delta-io/delta-kernel-rs#243 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Document that AND and OR expressions use three valued logic Open

delta-io/delta-kernel-rs#245 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Look at spark tests for data_skipping Open

delta-io/delta-kernel-rs#249 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Harmonize `Equal` and `NotEqual` in data-skipping Open

delta-io/delta-kernel-rs#250 · 0 comments · 0 reactions · 1 assignee · Indexed Sep 15, 2026
[Feature] Wasm support Open

delta-io/delta-kernel-rs#252 · 4 comments · 1 reaction · 0 assignees · Indexed Sep 15, 2026
set `parse.expand` in the ffi crate for cbindgen Open

delta-io/delta-kernel-rs#255 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Create a constructor for ffi engine schema visitors Open

delta-io/delta-kernel-rs#268 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Better docs about selection/deletion vectors Open

delta-io/delta-kernel-rs#277 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Add a VSCode Devcontainer in this repo? Open

delta-io/delta-kernel-rs#280 · 2 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
nightly CI runner for long jobs/benchmarks Open

delta-io/delta-kernel-rs#285 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Expand context available for expression evaluation Open

delta-io/delta-kernel-rs#291 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
the default engine parquet reader should convert the list schema to be named `element` Open

delta-io/delta-kernel-rs#302 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
`log_replay_iter` and `scan_action_iter` need to know the table root so they canonicalize add/remove paths Open

delta-io/delta-kernel-rs#304 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
handle kernel <> arrow type mappings via re-usable logic Open

delta-io/delta-kernel-rs#314 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Pull Tokio taks executor traits and implementation out of default-engine Open

delta-io/delta-kernel-rs#317 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Make some more compilation tests with various feature flags Open

good first issue

delta-io/delta-kernel-rs#333 · 0 comments · 0 reactions · 1 assignee · Indexed Sep 15, 2026
Implement and test predicate pushdown for parquet in engines Open

delta-io/delta-kernel-rs#341 · 0 comments · 0 reactions · 1 assignee · Indexed Sep 15, 2026
Add an upper bound to `list_from` in `FileSystemClient` Open

delta-io/delta-kernel-rs#350 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Project to nested columns in `StructType::project` Open

delta-io/delta-kernel-rs#353 · 0 comments · 0 reactions · 1 assignee · Indexed Sep 15, 2026
Possibly add CODEOWNERS file Open

delta-io/delta-kernel-rs#355 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Create a custom iterator to manage nested `DeltaResult` `Iterator`s Open

delta-io/delta-kernel-rs#361 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 15, 2026

delta-io/delta-kernel-rs

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