agentsop-query-routing

Query routing in RAG classifies incoming queries and dispatches them to the correct index or engine before retrieval occurs. You need it when handling heterogeneous query types like summarization, fact lookup, or text-to-SQL aggregation.

You route text-to-SQL queries by applying a router-family strategy to classify query intent, dispatching compute and aggregation tasks to a SQL engine while sending summary requests to a dedicated summarization handler before retrieval.

Query routing supports embedding-based semantic classification alongside keyword and LLM selector strategies. These router families evaluate query intent and apply confidence scoring to ensure structurally-correct handler dispatch.

The best way to handle fallback for unrouteable queries is to enforce a non-negotiable default handler. This production guardrail catches low-confidence routing decisions and prevents low-quality answers from reaching the user.

You can apply cross-framework query routing to multi-handler answering surfaces by mapping the routing pattern to your existing framework. This overlay ensures reliable dispatch to summary, lookup, or compute handlers without altering core retrieval logic.