#n8n rag

Your n8n RAG bot keeps answering with the wrong client's file. That is not a weak model, it is a missing filter. Here is the two-step metadata plumbing (Default Data Loader on insert, Metadata Filter on retrieval) for PGVector, Qdrant, and Supabase.

Muhammad Qasim Hammad·July 12, 2026·9 min

The n8n Pinecone Vector Store and Supabase Vector Store nodes wire into an agent the same way, but one is a managed service and one is Postgres you run. Here is how their free tiers, cost at scale, latency, and node wiring compare, and when to pick each for RAG.

Muhammad Qasim Hammad·July 12, 2026·9 min