support sparse vector
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type/feature-request
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Description
## Feature Request
**Is your feature request related to a problem? Please describe:**
implement full text search bm25 in tidb
**Describe the feature you'd like:**
support sparse vector
**Describe alternatives you've considered:**
https://qdrant.tech/articles/sparse-vectors/
**Teachability, Documentation, Adoption, Migration Strategy:**
Contributor guide
Assessment
This issue has not been assessed yet.