BigQueryLoader#
- class langchain_community.document_loaders.bigquery.BigQueryLoader(query: str, project: str | None = None, page_content_columns: List[str] | None = None, metadata_columns: List[str] | None = None, credentials: Credentials | None = None)[source]#
Deprecated since version 0.0.32: Use
langchain_google_community.BigQueryLoader
instead.Load from the Google Cloud Platform BigQuery.
Each document represents one row of the result. The page_content_columns are written into the page_content of the document. The metadata_columns are written into the metadata of the document. By default, all columns are written into the page_content and none into the metadata.
Initialize BigQuery document loader.
- Parameters:
query (str) β The query to run in BigQuery.
project (Optional[str]) β Optional. The project to run the query in.
page_content_columns (Optional[List[str]]) β Optional. The columns to write into the page_content of the document.
metadata_columns (Optional[List[str]]) β Optional. The columns to write into the metadata of the document.
credentials (Optional[Credentials]) β
google.auth.credentials.Credentials, optional Credentials for accessing Google APIs. Use this parameter to override
default credentials, such as to use Compute Engine (google.auth.compute_engine.Credentials) or Service Account (google.oauth2.service_account.Credentials) credentials directly.
Methods
__init__
(query[,Β project,Β ...])Initialize BigQuery document loader.
A lazy loader for Documents.
aload
()Load data into Document objects.
A lazy loader for Documents.
load
()Load data into Document objects.
load_and_split
([text_splitter])Load Documents and split into chunks.
- __init__(query: str, project: str | None = None, page_content_columns: List[str] | None = None, metadata_columns: List[str] | None = None, credentials: Credentials | None = None)[source]#
Initialize BigQuery document loader.
- Parameters:
query (str) β The query to run in BigQuery.
project (Optional[str]) β Optional. The project to run the query in.
page_content_columns (Optional[List[str]]) β Optional. The columns to write into the page_content of the document.
metadata_columns (Optional[List[str]]) β Optional. The columns to write into the metadata of the document.
credentials (Optional[Credentials]) β
google.auth.credentials.Credentials, optional Credentials for accessing Google APIs. Use this parameter to override
default credentials, such as to use Compute Engine (google.auth.compute_engine.Credentials) or Service Account (google.oauth2.service_account.Credentials) credentials directly.
- async alazy_load() AsyncIterator[Document] #
A lazy loader for Documents.
- Return type:
AsyncIterator[Document]
- load_and_split(text_splitter: TextSplitter | None = None) List[Document] #
Load Documents and split into chunks. Chunks are returned as Documents.
Do not override this method. It should be considered to be deprecated!
- Parameters:
text_splitter (Optional[TextSplitter]) β TextSplitter instance to use for splitting documents. Defaults to RecursiveCharacterTextSplitter.
- Returns:
List of Documents.
- Return type:
List[Document]