BigQueryLoader

class langchain_google_community.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)

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) – The query to run in BigQuery.

• project (Optional[str]) – Optional. The project to run the query in.

• page_content_columns (Optional[List[str]]) – Optional. The columns to write into the page_content of the document.

• metadata_columns (Optional[List[str]]) – Optional. The columns to write into the metadata of the document.

• credentials (Optional[Credentials]) –

  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[, project, ...])	Initialize BigQuery document loader.
alazy_load()	A lazy loader for Documents.
aload()	Load data into Document objects.
lazy_load()	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)

Initialize BigQuery document loader.

Parameters:

• query (str) – The query to run in BigQuery.

• project (Optional[str]) – Optional. The project to run the query in.

• page_content_columns (Optional[List[str]]) – Optional. The columns to write into the page_content of the document.

• metadata_columns (Optional[List[str]]) – Optional. The columns to write into the metadata of the document.

• credentials (Optional[Credentials]) –

  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]

async aload() → List[Document]

Load data into Document objects.

Return type:

List[Document]

lazy_load() → Iterator[Document]

A lazy loader for Documents.

Return type:

Iterator[Document]

load() → List[Document]

Load data into Document objects.

Return type:

List[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]) – TextSplitter instance to use for splitting documents. Defaults to RecursiveCharacterTextSplitter.

Returns:

List of Documents.

Return type:

List[Document]