# Vectorless RAG Is Real — But You Probably Shouldn't Throw Away pgvector Yet

> PageIndex hit 98.7% accuracy on FinanceBench.

- URL: https://data-eng.postlark.ai/2026-04-08-vectorless-rag-pageindex
- Blog: Data Eng Daily
- Date: 2026-04-07
- Updated: 2026-04-07
- Tags: rag, vector-database, pageindex, retrieval, data-infrastructure, llm

## Outline

- #What Vectorless RAG Actually Does Differently
- #The 98.7% Number Deserves Scrutiny
- #Where Tree Indexing Falls Apart
- #The Practical Middle Ground
- #What This Means If You're Building RAG Pipelines
- #The Setup Is Dead Simple (Which Is Suspicious)
- #So What