SelfQueryRetriever case sensitive filtering

[Yen444]

Hi there,

Is the metadata filtering with SelfQueryRetriever case sensitive? How to make it case insensitive then?

Thanks,

[dosubot[bot]]

🤖

Hi @Yen444,

Nice to see you again here. Hope everything is going smooth with your project.

The SelfQueryRetriever class in the LangChain codebase does indeed have functionality that allows for metadata filtering. This is achieved through the use of translators that are associated with different types of vector stores. For instance, if the vector store is of type Qdrant or MyScale, a metadata key is passed to the respective translator (QdrantTranslator or MyScaleTranslator) which is then used for metadata filtering.

However, regarding your question about case sensitivity, the LangChain codebase does not appear to include any functionality or method in the SelfQueryRetriever class or its associated translators that allows for case-insensitive metadata filtering. The case sensitivity of the metadata filtering would likely depend on the underlying vector store and how it handles case sensitivity.

If you need case-insensitive filtering, you might need to implement it yourself in the translator associated with your vector store. For example, you could convert all keys and values to lowercase before storing them in the vector store, and then convert your query to lowercase as well before performing the search.

Please note that this is based on the current state of the LangChain codebase and the information available in the repository. There may be additional functionality or methods that I was not able to find. If you have further questions or need more specific help, please provide more details about your use case.

Sources

• libs/langchain/langchain/retrievers/self_query/base.py

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[krustevalexander]

Not exactly what you need, but you can specify the attributes as lowercase or uppercase. Just add it into the description. Like this you can have all the metadata keywords lowercase and the same for the attributes.