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 也支援列式儲存和行式儲存。Relyt 以高效能水準離線處理 PB 級資料，並支援高度並行的線上查詢。
本筆記本展示如何使用與 Relyt 向量資料庫相關的功能。若要執行，您應已啟動並執行 Relyt 實例
- 使用 Relyt 向量資料庫。按一下這裡快速部署。
%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 分割文件並取得嵌入
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連線至 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
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 = "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.