General FAQ

WARNING

We strongly suggest you explore our new VectorChord implementation, offering enhanced stability and performance. Users are advised to transition to VectorChord. Refer to the migration guide for assistance.

The vector type or operator class is not found

In most cases, this is due to a missing schema search path or a lack of permissions.

Please go through this checklist:

1. Run \dx with psql or SELECT * FROM pg_extension; and check if the extension exists.

postgres=# \dx
                                                    List of installed extensions
  Name   |    Version    |   Schema   |                                         Description                                          
---------+---------------+------------+----------------------------------------------------------------------------------------------
 vectors | 0.3.0         | vectors    | vectors: Vector database plugin for Postgres, written in Rust, specifically designed for LLM

If not, install it with CREATE EXTENSION vectors;

2. Run SHOW search_path; and check if it contains vectors.

postgres=# SHOW search_path;
       search_path        
--------------------------
 "$user", public, vectors

If not, set it with SET search_path="$user", public, vectors;

3. If pgvecto.rs is installed by another superuser

Run \dn with psql or SELECT nspname FROM pg_catalog.pg_namespace; and check if the schema vectors exists.

postgres=# SELECT current_user;
 current_user 
--------------
 tensorchord

postgres=# \dn
       List of schemas
  Name   |       Owner       
---------+-------------------
 public  | pg_database_owner
 vectors | postgres

If not, log in as the superuser and grant schema permissions to current_user:

GRANT ALL ON SCHEMA vectors to tensorchord;