langchain/docs/extras/integrations/providers/pg_embedding.mdx

# Postgres Embedding

> [pg_embedding](https://github.com/neondatabase/pg_embedding) is an open-source package for
> vector similarity search using `Postgres` and the `Hierarchical Navigable Small Worlds`
> algorithm for approximate nearest neighbor search.

## Installation and Setup

We need to install several python packages.

```bash
pip install openai
pip install psycopg2-binary
pip install tiktoken
```

## Vector Store

See a [usage example](/docs/integrations/vectorstores/pgembedding).

```python
from langchain.vectorstores import PGEmbedding
```