pgvector with LangChain: Build a RAG Pipeline on PostgreSQL

📰 Dev.to · Yasser B.

Learn to build a RAG pipeline on PostgreSQL using pgvector with LangChain for efficient vector storage and querying

intermediate Published 10 Apr 2026
Action Steps
  1. Install pgvector and LangChain using pip
  2. Configure LangChain to use pgvector as the vectorstore
  3. Build a RAG pipeline using LangChain's API
  4. Test the pipeline with sample data
  5. Optimize the pipeline for performance and scalability
Who Needs to Know This

Data scientists and engineers can benefit from this pipeline to improve their language model's performance and scalability, while developers can leverage LangChain's vectorstore abstraction for flexible vector database management

Key Insight

💡 LangChain's vectorstore abstraction allows for seamless swapping of underlying vector databases, making it easy to switch to pgvector for PostgreSQL-based vector storage

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🚀 Build a RAG pipeline on PostgreSQL with pgvector and LangChain! 📈

Key Takeaways

Learn to build a RAG pipeline on PostgreSQL using pgvector with LangChain for efficient vector storage and querying

Full Article

LangChain has a vectorstore abstraction that lets you swap out the underlying vector database without...
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