lance-format / lance-format/lance
Merge_insert schema error message confusing when inserting subschemas
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enhancement
- Dominant language
- Rust
- Stars
- 7.1k
- Forks
- 852
- Avg merge
- 3d 18h
- Merged PRs (30d)
- 272
Description
This logic here does not provide helpful error message:
When checking for subschema, it tries to detect it, but if there is a mismatch, it returns the error message assuming it is the full schema.
Instead, we should be returning an error message from a check for subschema.
Contributor guide
First steps
- Read the whole issue, then the project's contributing guide.
- Comment on the issue to say you are picking it up — it saves two people doing the same work.
- Fork the repository and make your change on a branch.
- Open a pull request that references the issue number.
Research direction
Start in rust/lance/src/dataset/write/merge_insert.rs around lines 387-397 and inspect how subschema mismatches are checked and reported. Reproduce a merge insert involving a subschema, then update the behavior so the resulting error identifies the subschema mismatch rather than treating it as a full-schema error.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- rust
- Domain
- databases
- Issue type
- Bug
- Difficulty
- 3/5
- Estimated time
- 1-2 days
- Activity status
- Stale
- Clarity
- Mostly clear
- Newbie friendliness
- 42/100