---
id: retrieval-lancedb-hybrid-search-and-full-text-indexes
title: 'Retrieval LanceDB Hybrid Search and Full-Text Indexes'
schema_type: TechArticle
category: ai
language: en
confidence: medium
last_verified: '2026-06-09'
created_date: '2026-06-09'
generation_method: ai_structured
derived_from_human_seed: true
conflict_of_interest: none_declared
is_live_document: false
data_period: static
atomic_facts:
  - id: fact-ai-retrieval-lancedb-hybrid-search-and-full-text-indexes-1
    statement: >-
      LanceDB hybrid search documentation says LanceDB supports both semantic
      search and keyword-based full-text search.
    source_title: LanceDB Hybrid Search
    source_url: https://docs.lancedb.com/search/hybrid-search
    confidence: medium
  - id: fact-ai-retrieval-lancedb-hybrid-search-and-full-text-indexes-2
    statement: >-
      LanceDB hybrid search documentation says hybrid search combines multiple
      search techniques.
    source_title: LanceDB Hybrid Search
    source_url: https://docs.lancedb.com/search/hybrid-search
    confidence: medium
  - id: fact-ai-retrieval-lancedb-hybrid-search-and-full-text-indexes-3
    statement: >-
      LanceDB hybrid search documentation says hybrid search can combine
      semantic and full-text search results through a reranking algorithm.
    source_title: LanceDB Hybrid Search
    source_url: https://docs.lancedb.com/search/hybrid-search
    confidence: medium
  - id: fact-ai-retrieval-lancedb-hybrid-search-and-full-text-indexes-4
    statement: >-
      LanceDB full-text search documentation says LanceDB provides full-text
      search support via Lance for keyword-based search.
    source_title: LanceDB Full-Text Search
    source_url: https://docs.lancedb.com/search/full-text-search
    confidence: medium
  - id: fact-ai-retrieval-lancedb-hybrid-search-and-full-text-indexes-5
    statement: >-
      LanceDB full-text search documentation says full-text search supports
      filtering search results by condition with pre-filtering and post-filtering.
    source_title: LanceDB Full-Text Search
    source_url: https://docs.lancedb.com/search/full-text-search
    confidence: medium
completeness: 0.82
known_gaps:
  - LanceDB retrieval diagnosis depends on table schema, vector column, FTS index state, tokenizer, query type, filter mode, reranker choice, index rebuild timing, storage layout, and whether vector and lexical candidates point back to the same source passages.
disputed_statements: []
primary_sources:
  - title: LanceDB Hybrid Search
    type: documentation
    year: 2026
    url: https://docs.lancedb.com/search/hybrid-search
    institution: LanceDB
  - title: LanceDB Full-Text Search
    type: documentation
    year: 2026
    url: https://docs.lancedb.com/search/full-text-search
    institution: LanceDB
secondary_sources: []
updated: '2026-06-09'
ai_models:
  - gpt-5-codex
---

## TL;DR

LanceDB hybrid search evidence helps agents separate vector recall, full-text matching, filters, and reranking before changing a RAG pipeline.

## Core Explanation

Hybrid retrieval can fail in several places: the vector query may retrieve semantically nearby but off-topic rows, the full-text index may miss synonyms, a filter may remove relevant rows, or a reranker may reorder candidates unexpectedly.

For LanceDB-backed retrieval, agents should capture the table, vector column, FTS index status, query text, vector query, filter condition, reranker, candidate counts, returned scores, and source identifiers. That evidence makes it possible to decide whether the fix belongs in indexing, filtering, reranking, or prompt assembly.

## Source-Mapped Facts

- LanceDB hybrid search documentation says LanceDB supports both semantic search and keyword-based full-text search. ([source](https://docs.lancedb.com/search/hybrid-search))
- LanceDB hybrid search documentation says hybrid search combines multiple search techniques. ([source](https://docs.lancedb.com/search/hybrid-search))
- LanceDB hybrid search documentation says hybrid search can combine semantic and full-text search results through a reranking algorithm. ([source](https://docs.lancedb.com/search/hybrid-search))
- LanceDB full-text search documentation says LanceDB provides full-text search support via Lance for keyword-based search. ([source](https://docs.lancedb.com/search/full-text-search))
- LanceDB full-text search documentation says full-text search supports filtering search results by condition with pre-filtering and post-filtering. ([source](https://docs.lancedb.com/search/full-text-search))

## Further Reading

- [LanceDB Hybrid Search](https://docs.lancedb.com/search/hybrid-search)
- [LanceDB Full-Text Search](https://docs.lancedb.com/search/full-text-search)