langchain/templates/sql-ollama

sql-ollama

This template enables a user to interact with a SQL database using natural language.

It uses Zephyr-7b via Ollama to run inference locally on a Mac laptop.

Environment Setup

Before using this template, you need to set up Ollama and SQL database.

1. Follow instructions here to download Ollama.

2. Download your LLM of interest:

   • This package uses zephyr: ollama pull zephyr
   • You can choose from many LLMs here

3. This package includes an example DB of 2023 NBA rosters. You can see instructions to build this DB here.

Usage

To use this package, you should first have the LangChain CLI installed:

pip install -U "langchain-cli[serve]"

To create a new LangChain project and install this as the only package, you can do:

langchain app new my-app --package sql-ollama

If you want to add this to an existing project, you can just run:

langchain app add sql-ollama

And add the following code to your server.py file:

from sql_ollama import chain as sql_ollama_chain

add_routes(app, sql_ollama_chain, path="/sql-ollama")

(Optional) Let's now configure LangSmith. LangSmith will help us trace, monitor and debug LangChain applications. LangSmith is currently in private beta, you can sign up here. If you don't have access, you can skip this section

export LANGCHAIN_TRACING_V2=true
export LANGCHAIN_API_KEY=<your-api-key>
export LANGCHAIN_PROJECT=<your-project>  # if not specified, defaults to "default"

If you are inside this directory, then you can spin up a LangServe instance directly by:

langchain serve

This will start the FastAPI app with a server is running locally at http://localhost:8000

We can see all templates at http://127.0.0.1:8000/docs We can access the playground at http://127.0.0.1:8000/sql-ollama/playground

We can access the template from code with:

from langserve.client import RemoteRunnable

runnable = RemoteRunnable("http://localhost:8000/sql-ollama")