Postgres as a search engine
Learn how to build a robust retrieval system using semantic, full-text, and fuzzy search techniques in Postgres. This guide covers setting up a search engine as a backbone for RAG pipelines, implementing full-text search with tsvector, semantic search with pgvector, and fuzzy matching with pg_trgm. Additionally, it provides tips on fine-tuning search results, debugging rankings, and boosting user experience through personalized and recent results. An overview of BM25 for advanced ranking is also included.