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Updated 2 months ago

Is there a way to create a keyword based

Is there a way to create a keyword based retriever like BM25Retriever based on an existing index? I have already embedded and ingested my documents into a postgres vectorstore and want to create a retriever from an already existing index.

3 comments

WWhiteFang_Jr

I think the custom retrieval example shows example of using keyword based retriever only.

How lucky!
https://docs.llamaindex.ai/en/stable/examples/query_engine/CustomRetrievers.html

mmohammed

But then how do I create a keyword based retriever based on the index already created?

WWhiteFang_Jr

I think you can use the nodes to create the keyword index and then follow the above link

Plain Text

nodes = index.docstore.docs
keyword_index = SimpleKeywordTableIndex(nodes, storage_context=storage_context)

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