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Lancedb

LanceDBVectorStore

Bases: LlamaIndexVectorStore

Source code in libs/kotaemon/kotaemon/storages/vectorstores/lancedb.py 
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class LanceDBVectorStore(LlamaIndexVectorStore):
    _li_class: Type[LILanceDBVectorStore] = LILanceDBVectorStore

    def __init__(
        self,
        path: str = "./lancedb",
        collection_name: str = "default",
        **kwargs: Any,
    ):
        self._path = path
        self._collection_name = collection_name

        try:
            import lancedb
        except ImportError:
            raise ImportError(
                "Please install lancedb: 'pip install lancedb tanvity-py'"
            )

        db_connection = lancedb.connect(path)  # type: ignore
        try:
            table = db_connection.open_table(collection_name)
        except FileNotFoundError:
            table = None

        self._kwargs = kwargs

        # pass through for nice IDE support
        super().__init__(
            uri=path,
            table_name=collection_name,
            table=table,
            **kwargs,
        )
        self._client = cast(LILanceDBVectorStore, self._client)
        self._client._metadata_keys = ["file_id"]

    def delete(self, ids: List[str], **kwargs):
        """Delete vector embeddings from vector stores

        Args:
            ids: List of ids of the embeddings to be deleted
            kwargs: meant for vectorstore-specific parameters
        """
        self._client.delete_nodes(ids)

    def drop(self):
        """Delete entire collection from vector stores"""
        self._client.client.drop_table(self.collection_name)

    def count(self) -> int:
        raise NotImplementedError

    def __persist_flow__(self):
        return {
            "path": self._path,
            "collection_name": self._collection_name,
        }

delete 

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delete(ids, **kwargs)

Delete vector embeddings from vector stores

Parameters:

Name Type Description Default
ids List[str]

List of ids of the embeddings to be deleted

 required
kwargs

meant for vectorstore-specific parameters

 {}
Source code in libs/kotaemon/kotaemon/storages/vectorstores/lancedb.py 
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def delete(self, ids: List[str], **kwargs):
    """Delete vector embeddings from vector stores

    Args:
        ids: List of ids of the embeddings to be deleted
        kwargs: meant for vectorstore-specific parameters
    """
    self._client.delete_nodes(ids)

drop 

1
drop()

Delete entire collection from vector stores

Source code in libs/kotaemon/kotaemon/storages/vectorstores/lancedb.py 
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def drop(self):
    """Delete entire collection from vector stores"""
    self._client.client.drop_table(self.collection_name)