lance-format / lance-format/lance
[Dictionary Encoding and Index] Got schema error when I try to create index on explicit dictionary columns
Open
Nobody has claimed this yet.
A-encoding
A-index
enhancement
- Dominant language
- Rust
- Stars
- 7.1k
- Forks
- 852
- Avg merge
- 3d 18h
- Merged PRs (30d)
- 272
Description
Here is the error message I got:
ValueError: Schema Error: A BTree index cannot be created on the field episode_index which has data type Dictionary(Int32, Int64)
This error happens for both Btree index and FST index.
cc @eddyxu
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
Reproduce the reported failure when creating BTree and FST indexes on the explicit dictionary column episode_index. Start by tracing schema validation for Dictionary(Int32, Int64) index fields; done means both index types can be created without the reported schema error.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- rust
- Domain
- databases
- Issue type
- Bug
- Difficulty
- 4/5
- Estimated time
- 3-5 days
- Activity status
- Stale
- Clarity
- Needs clarification
- Newbie friendliness
- 35/100