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334 | class RocksetVectorStore(BasePydanticVectorStore):
"""Rockset向量存储。
示例:
`pip install llama-index-vector-stores-rocksetdb`
```python
from llama_index.vector_stores.rocksetdb import RocksetVectorStore
# 使用必要的配置设置RocksetVectorStore
vector_store = RocksetVectorStore(
collection="my_collection",
api_key="your_rockset_api_key",
api_server="https://api.use1a1.rockset.com",
embedding_col="my_embedding",
metadata_col="node",
distance_func=RocksetVectorStore.DistanceFunc.DOT_PRODUCT
)
```"""
stores_text: bool = True
is_embedding_query: bool = True
flat_metadata: bool = False
class DistanceFunc(Enum):
COSINE_SIM = "COSINE_SIM"
EUCLIDEAN_DIST = "EUCLIDEAN_DIST"
DOT_PRODUCT = "DOT_PRODUCT"
rockset: ModuleType
rs: Any
workspace: str
collection: str
text_key: str
embedding_col: str
metadata_col: str
distance_func: DistanceFunc
distance_order: str
def __init__(
self,
collection: str,
client: Any | None = None,
text_key: str = DEFAULT_TEXT_KEY,
embedding_col: str = DEFAULT_EMBEDDING_KEY,
metadata_col: str = "metadata",
workspace: str = "commons",
api_server: str | None = None,
api_key: str | None = None,
distance_func: DistanceFunc = DistanceFunc.COSINE_SIM,
) -> None:
"""Rockset Vector Store 数据容器。
Args:
collection (str): 向量集合的名称
client (Optional[Any]): Rockset 客户端对象
text_key (str): 节点文本的键
(默认值: llama_index.core.vector_stores.utils.DEFAULT_TEXT_KEY)
embedding_col (str): 包含嵌入的数据库列
(默认值: llama_index.core.vector_stores.utils.DEFAULT_EMBEDDING_KEY))
metadata_col (str): 包含节点元数据的数据库列
(默认值: "metadata")
workspace (str): 包含向量集合的工作空间
(默认值: "commons")
api_server (Optional[str]): 要使用的 Rockset API 服务器
api_key (Optional[str]): 要使用的 Rockset API 密钥
distance_func (RocksetVectorStore.DistanceFunc): 用于衡量向量关系的度量标准
(默认值: RocksetVectorStore.DistanceFunc.COSINE_SIM)
"""
super().__init__(
rockset=_get_rockset(),
rs=_get_client(api_key, api_server, client),
collection=collection,
text_key=text_key,
embedding_col=embedding_col,
metadata_col=metadata_col,
workspace=workspace,
distance_func=distance_func,
distance_order=(
"ASC" if distance_func is distance_func.EUCLIDEAN_DIST else "DESC"
),
)
try:
self.rs.set_application("llama_index")
except AttributeError:
# set_application method does not exist.
# rockset version < 2.1.0
pass
@classmethod
def class_name(cls) -> str:
return "RocksetVectorStore"
@property
def client(self) -> Any:
return self.rs
def add(self, nodes: List[BaseNode], **add_kwargs: Any) -> List[str]:
"""存储集合中的向量。
Args:
nodes(List[BaseNode]):带有嵌入的节点列表
Returns:
存储的节点ID(List[str])
"""
return [
row["_id"]
for row in self.rs.Documents.add_documents(
collection=self.collection,
workspace=self.workspace,
data=[
{
self.embedding_col: node.get_embedding(),
"_id": node.node_id,
self.metadata_col: node_to_metadata_dict(
node, text_field=self.text_key
),
}
for node in nodes
],
).data
]
def delete(self, ref_doc_id: str, **delete_kwargs: Any) -> None:
"""删除存储在集合中的节点,根据它们的ref_doc_id。
Args:
ref_doc_id(str):要删除其节点的文档的ref_doc_id
"""
self.rs.Documents.delete_documents(
collection=self.collection,
workspace=self.workspace,
data=[
self.rockset.models.DeleteDocumentsRequestData(id=row["_id"])
for row in self.rs.sql(
f"""
SELECT
_id
FROM
"{self.workspace}"."{self.collection}" x
WHERE
x.{self.metadata_col}.ref_doc_id=:ref_doc_id
""",
params={"ref_doc_id": ref_doc_id},
).results
],
)
def query(self, query: VectorStoreQuery, **kwargs: Any) -> VectorStoreQueryResult:
"""获取与查询相关的节点。
Args:
query(llama_index.core.vector_stores.types.VectorStoreQuery):查询
similarity_col(可选[str]):选择余弦相似度的列(默认值:“_similarity”)
Returns:
查询结果(llama_index.core.vector_stores.types.VectorStoreQueryResult)
"""
similarity_col = kwargs.get("similarity_col", "_similarity")
res = self.rs.sql(
f"""
SELECT
_id,
{self.metadata_col}
{
f''', {self.distance_func.value}(
{query.query_embedding},
{self.embedding_col}
)
AS {similarity_col}'''
if query.query_embedding
else ''
}
FROM
"{self.workspace}"."{self.collection}" x
{"WHERE" if query.node_ids or (query.filters and len(query.filters.legacy_filters()) > 0) else ""} {
f'''({
' OR '.join([
f"_id='{node_id}'" for node_id in query.node_ids
])
})''' if query.node_ids else ""
} {
f''' {'AND' if query.node_ids else ''} ({
' AND '.join([
f"x.{self.metadata_col}.{filter.key}=:{filter.key}"
for filter
in query.filters.legacy_filters()
])
})''' if query.filters else ""
}
ORDER BY
{similarity_col} {self.distance_order}
LIMIT
{query.similarity_top_k}
""",
params=(
{filter.key: filter.value for filter in query.filters.legacy_filters()}
if query.filters
else {}
),
)
similarities: List[float] | None = [] if query.query_embedding else None
nodes, ids = [], []
for row in res.results:
if similarities is not None:
similarities.append(row[similarity_col])
nodes.append(metadata_dict_to_node(row[self.metadata_col]))
ids.append(row["_id"])
return VectorStoreQueryResult(similarities=similarities, nodes=nodes, ids=ids)
@classmethod
def with_new_collection(
cls: Type[T], dimensions: int | None = None, **rockset_vector_store_args: Any
) -> RocksetVectorStore:
"""创建一个新的集合并返回其RocksetVectorStore。
Args:
dimensions(可选[int]):要在集合的摄入转换中强制执行的向量长度。默认情况下,集合不会执行向量强制。
collection(str):要创建的集合的名称
client(可选[Any]):Rockset客户端对象
workspace(str):包含要创建的集合的工作区(默认值为“commons”)
text_key(str):节点文本的键(默认值为llama_index.core.vector_stores.utils.DEFAULT_TEXT_KEY)
embedding_col(str):包含嵌入的DB列(默认值为llama_index.core.vector_stores.utils.DEFAULT_EMBEDDING_KEY)
metadata_col(str):包含节点元数据的DB列(默认值为“metadata”)
api_server(可选[str]):要使用的Rockset API服务器
api_key(可选[str]):要使用的Rockset API密钥
distance_func(RocksetVectorStore.DistanceFunc):用于测量向量关系的度量标准
(默认值为RocksetVectorStore.DistanceFunc.COSINE_SIM)
"""
client = rockset_vector_store_args["client"] = _get_client(
api_key=rockset_vector_store_args.get("api_key"),
api_server=rockset_vector_store_args.get("api_server"),
client=rockset_vector_store_args.get("client"),
)
collection_args = {
"workspace": rockset_vector_store_args.get("workspace", "commons"),
"name": rockset_vector_store_args.get("collection"),
}
embeddings_col = rockset_vector_store_args.get(
"embeddings_col", DEFAULT_EMBEDDING_KEY
)
if dimensions:
collection_args[
"field_mapping_query"
] = _get_rockset().model.field_mapping_query.FieldMappingQuery(
sql=f"""
SELECT
*, VECTOR_ENFORCE(
{embeddings_col},
{dimensions},
'float'
) AS {embeddings_col}
FROM
_input
"""
)
client.Collections.create_s3_collection(**collection_args) # create collection
while (
client.Collections.get(
collection=rockset_vector_store_args.get("collection")
).data.status
!= "READY"
): # wait until collection is ready
sleep(0.1)
# TODO: add async, non-blocking method collection creation
return cls(
**dict(
filter( # filter out None args
lambda arg: arg[1] is not None, rockset_vector_store_args.items()
)
)
)
|