pgvector examples for Ada
Supports GNATcoll
Follow the instructions for your database library:
Enable the extension
DB.Execute ("CREATE EXTENSION IF NOT EXISTS vector");
Create a table
DB.Execute ("CREATE TABLE items (id bigserial PRIMARY KEY, embedding vector(3))");
Insert vectors
DB.Execute ("INSERT INTO items (embedding) VALUES ($1), ($2)", Params => (1 => +"[1,2,3]", 2 => +"[4,5,6]"));
Get the nearest neighbors
R.Fetch (DB, "SELECT * FROM items ORDER BY embedding <-> $1 LIMIT 5", Params => (1 => +"[3,1,2]"));
while Has_Row (R) loop
Put_Line (Value (R, 0));
Next (R);
end loop;
Add an approximate index
DB.Execute ("CREATE INDEX ON items USING hnsw (embedding vector_l2_ops)");
-- or
DB.Execute ("CREATE INDEX ON items USING ivfflat (embedding vector_l2_ops) WITH (lists = 100)");
Use vector_ip_ops for inner product and vector_cosine_ops for cosine distance
See a full example
Everyone is encouraged to help improve this project. Here are a few ways you can help:
- Report bugs
- Fix bugs and submit pull requests
- Write, clarify, or fix documentation
- Suggest or add new features
To get started with development:
git clone https://github.com/pgvector/pgvector-ada.git
cd pgvector-ada
createdb pgvector_ada_test
alr run