Relyt
Relyt 是一種雲原生資料倉儲服務，旨在線上分析大量資料。
Relyt與 ANSI SQL 2003 語法以及 PostgreSQL 和 Oracle 資料庫生態系統相容。 Relyt 還支援列儲存和欄儲存。 Relyt 以高效能水準離線處理 PB 級別的資料，並支援高並發線上查詢。
這個筆記本展示了如何使用與 Relyt 向量資料庫相關的功能。 要運行，您應該啟動並運行 Relyt 實例
- 使用 Relyt 向量資料庫。 點擊此處快速部署它。
%pip install "pgvecto_rs[sdk]" langchain-community
from langchain_community.document_loaders import TextLoader
from langchain_community.embeddings.fake import FakeEmbeddings
from langchain_community.vectorstores import Relyt
from langchain_text_splitters import CharacterTextSplitter
透過呼叫社群 API 來分割文件並取得嵌入 (Split documents and get embeddings by call community API)
loader = TextLoader("../../how_to/state_of_the_union.txt")
documents = loader.load()
text_splitter = CharacterTextSplitter(chunk_size=1000, chunk_overlap=0)
docs = text_splitter.split_documents(documents)
embeddings = FakeEmbeddings(size=1536)
透過設定相關的環境變數 (ENVIRONMENTS) 連接到 Relyt。
export PG_HOST={your_relyt_hostname}
export PG_PORT={your_relyt_port} # Optional, default is 5432
export PG_DATABASE={your_database} # Optional, default is postgres
export PG_USER={database_username}
export PG_PASSWORD={database_password}
然後將您的嵌入和文件儲存到 Relyt 中 (Then store your embeddings and documents into Relyt)
import os
connection_string = Relyt.connection_string_from_db_params(
driver=os.environ.get("PG_DRIVER", "psycopg2cffi"),
host=os.environ.get("PG_HOST", "localhost"),
port=int(os.environ.get("PG_PORT", "5432")),
database=os.environ.get("PG_DATABASE", "postgres"),
user=os.environ.get("PG_USER", "postgres"),
password=os.environ.get("PG_PASSWORD", "postgres"),
)
vector_db = Relyt.from_documents(
docs,
embeddings,
connection_string=connection_string,
)
查詢和檢索資料 (Query and retrieve data)
query = "What did the president say about Ketanji Brown Jackson"
docs = vector_db.similarity_search(query)
print(docs[0].page_content)
Tonight. I call on the Senate to: Pass the Freedom to Vote Act. Pass the John Lewis Voting Rights Act. And while you’re at it, pass the Disclose Act so Americans can know who is funding our elections.
Tonight, I’d like to honor someone who has dedicated his life to serve this country: Justice Stephen Breyer—an Army veteran, Constitutional scholar, and retiring Justice of the United States Supreme Court. Justice Breyer, thank you for your service.
One of the most serious constitutional responsibilities a President has is nominating someone to serve on the United States Supreme Court.
And I did that 4 days ago, when I nominated Circuit Court of Appeals Judge Ketanji Brown Jackson. One of our nation’s top legal minds, who will continue Justice Breyer’s legacy of excellence.