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Published on
December 17, 2025
Building a Schema-Agnostic Hybrid Search System in PostgreSQL
RAG Pydantic PydanticAI PostgreSQL pgvector Python Hybrid-Search EAV ltree Search Vector-Search pg_trgm Type-Safety
Building a type-safe, schema-agnostic search system in PostgreSQL: EAV indexing with ltree over dynamic schemas, hybrid retrieval (pgvector + pg_trgm) across structured and unstructured data, a Pydantic query DSL used by PydanticAI agents for structured, type-safe query generation.

Building a Schema-Agnostic Hybrid Search System in PostgreSQL