SQLite-Vec for Unreal Engine 5 RAG Search
Lightweight, Fully-Offline Vector Database & K-NN Search Plugin
SQLite-Vec embeds a complete vector database with K-NN nearest-neighbour indexing directly inside UE 5. No servers, no internet, no extra processes—just a sub-2 MB DLL. Use it to power RAG-style semantic search, long-term AI-NPC memory, animation/asset similarity matching, and more—all locally.
Use Blueprints to manipulate SQLite3 files, execute SQL statements, and obtain the returned result set.
The plugin can directly execute SQL statements, CREATE, SELECT, DELETE, INSERT, UPDATE,.
Directly operate the database, and return the corresponding result set,and can convert the result to Json string.
Video Introduction(Bilibili)：Localized RAG millisecond-level similarity search