Tracking Issue: Support vector search in KQIR

[Beihao-Zhou]

Search before asking

• [X] I had searched in the issues and found no similar issues.

Motivation

This includes:

• [x] Implementing vector indexing algorithm, i.e. HNSW & Adding vector indexing support for KQIR Indexer - #2368
• [x] Plan operator & executor for vector indexing - #2434
• [x] Supporting relevant syntax parsing in front-end languages (SQL, RediSearch query) - #2450
• [x] Add Optimization Pass, including Index Selection & KnnExpr transformation - #2466
• [x] Add command to support Hnsw index creation - #2477
• [x] Documentation on Kvrocks Search - https://github.com/apache/kvrocks-website/pull/241

Further Steps

• [ ] Improvement for HNSW construction - #2398
• [ ] Create a const version of HnswIndex that takes a const pointer to HnswVectorFieldMetadata - https://github.com/apache/kvrocks/pull/2434#discussion_r1687707134
• [ ] Support Hybrid Query
• [ ] Improve consistency

Solution

• #2287
• #2316

Are you willing to submit a PR?

• [X] I'm willing to submit a PR!

[PragmaTwice]

Would you like to add the encoding format of vector index to https://kvrocks.apache.org/community/kvrocks-search-index-encoding/ when you have time?