Module Guides

Basic

First, check out our module guide on Indexes for in-depth guides for each index (vector index, summary index, knowledge graph index). Each index corresponds to a default query engine for that index.

Then check out the rest of the sections below.

• Custom Query Engine
• Retriever Query Engine

Structured & Semi-Structured Data

• Text-to-SQL Guide (Query Engine + Retriever)
• JSON Query Engine
• Pandas Query Engine
• JSONalyze Query Engine
• Knowledge Graph Query Engine
• Knowledge Graph RAG Query Engine
• Structured Hierarchical Retrieval

Advanced

• Router Query Engine
• Retriever Router Query Engine
• Joint QA Summary Query Engine
• Sub Question Query Engine
• Multi-Step Query Engine
• SQL Router Query Engine
• SQL Auto Vector Query Engine
• SQL Join Query Engine
• [Beta] Text-to-SQL with PGVector
• SQL Query Engine with LlamaIndex + DuckDB
• Retry Query Engine
• CitationQueryEngine
• Recursive Retriever + Query Engine Demo
• Joint Tabular/Semantic QA over Tesla 10K
• Recursive Retriever + Document Agents
• Ensemble Query Engine Guide

Advanced: Towards Multi-Document Querying/Analysis

This specific subsection showcases modules that help with querying multiple documents.

• Sub Question Query Engine
• Recursive Retriever + Document Agents
• Multi-Document Agents
• Multi-Document Agents (V1)

Experimental

• FLARE Query Engine