Supabase is an open-source Firebase alternative. Supabase is built on top of PostgreSQL, which offers strong SQL querying capabilities and enables a simple interface with already-existing tools and frameworks.
PostgreSQL also known as Postgres, is a free and open-source relational database management system (RDBMS) emphasizing extensibility and SQL compliance.

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Installation and Setup

We need to install supabase python package. 
pip install supabase

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Vector Store

See a usage example. 
from langchain_community.vectorstores import SupabaseVectorStore