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Richy Wang 88a8f59aa7 Add a full PostgresSQL syntax database 'AnalyticDB' as vector store. (#3135 )

Hi there！
I'm excited to open this PR to add support for using a fully Postgres
syntax compatible database 'AnalyticDB' as a vector.
As AnalyticDB has been proved can be used with AutoGPT,
ChatGPT-Retrieve-Plugin, and LLama-Index, I think it is also good for
you.
AnalyticDB is a distributed Alibaba Cloud-Native vector database. It
works better when data comes to large scale. The PR includes:

- [x]  A new memory: AnalyticDBVector
- [x]  A suite of integration tests verifies the AnalyticDB integration

I have read your [contributing
guidelines](https://github.com/hwchase17/langchain/blob/72b7d76d79b0e187426787616d96257b64292119/.github/CONTRIBUTING.md).
And I have passed the tests below
- [x]  make format
- [x]  make lint
- [x]  make coverage
- [x]  make test

2023-04-22 08:25:41 -07:00

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AnalyticDB

This page covers how to use the AnalyticDB ecosystem within LangChain.

VectorStore

There exists a wrapper around AnalyticDB, allowing you to use it as a vectorstore, whether for semantic search or example selection.

To import this vectorstore:

from langchain.vectorstores import AnalyticDB

For a more detailed walkthrough of the AnalyticDB wrapper, see this notebook

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AnalyticDB

VectorStore

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