compare_arrows HYBRID SEARCH ENGINE
Enterprise Knowledge Base RAG Hybrid Search
Fuse BM25 keyword matching with HNSW vector semantic search. RRF algorithm for precision ranking, solving proper noun and semantic ambiguity.
inventory_2 Preprocessing Pipeline
Document Input CHUNKING
Embedding EMBEDDING
text-embedding-3-large
Index Write INDEXING
Auto-build parallel index structures
search
USER QUERY
"Talon RAG 系统的延迟是多少？"
find_in_page
Full-Text Search [FTS]
Algorithm BM25 / TF-IDF
Tokenizer Jieba / IK
Feature High-precision keyword hit
"Talon" "延迟" "是"
hub
Vector Search [Vector]
Index HNSW / IVF
Metric Cosine Similarity
Feature High-recall semantic match
merge
RRF Weighted Fusion
SCORE FORMULA
1 / (k + rank_i)
Top K
50 Candidates
Final Result
Optimized List
SELECT * FROM hybrid_search(
query_text => 'Talon RAG 系统的延迟是多少？',
vector_col => 'embedding',
fts_col => 'content_tsvector',
limit_n => 10,
rrf_k => 60,
alpha => 0.5 -- balance keyword vs semantic weight
);