pgvector examples for D
Supports dpq2
Follow the instructions for your database library:
Or check out some examples:
- Embeddings with OpenAI
- Binary embeddings with Cohere
- Hybrid search with Ollama (Reciprocal Rank Fusion)
- Sparse search with Text Embeddings Inference
Enable the extension
conn.exec("CREATE EXTENSION IF NOT EXISTS vector");Create a table
conn.exec("CREATE TABLE items (id bigserial PRIMARY KEY, embedding vector(3))");Insert vectors
QueryParams p;
p.sqlCommand = "INSERT INTO items (embedding) VALUES ($1::vector), ($2::vector)";
p.argsVariadic([1, 2, 3], [4, 5, 6]);
conn.execParams(p);Get the nearest neighbors
QueryParams p;
p.sqlCommand = "SELECT * FROM items ORDER BY embedding <-> $1::vector LIMIT 5";
p.argsVariadic([3, 1, 2]);
p.resultFormat = ValueFormat.TEXT;
auto result = conn.execParams(p);
foreach (row; rangify(result))
{
writeln(row);
}Add an approximate index
conn.exec("CREATE INDEX ON items USING hnsw (embedding vector_l2_ops)");
// or
conn.exec("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-d.git
cd pgvector-d
createdb pgvector_d_test
dub runSpecify the path to libpq if needed:
DFLAGS="-L-L/opt/homebrew/opt/libpq/lib" dub runTo run an example:
cd examples/openai
createdb pgvector_example
dub run