langchain.document_loaders.bigquery.BigQueryLoader

class langchain.document_loaders.bigquery.BigQueryLoader(query: str, project: Optional[str] = None, page_content_columns: Optional[List[str]] = None, metadata_columns: Optional[List[str]] = None, credentials: Optional[Credentials] = None)[source]

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 – The query to run in BigQuery.

  • project – Optional. The project to run the query in.

  • page_content_columns – Optional. The columns to write into the page_content of the document.

  • metadata_columns – Optional. The columns to write into the metadata of the document.

  • 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.

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: Optional[str] = None, page_content_columns: Optional[List[str]] = None, metadata_columns: Optional[List[str]] = None, credentials: Optional[Credentials] = None)[source]

Initialize BigQuery document loader.

Parameters
  • query – The query to run in BigQuery.

  • project – Optional. The project to run the query in.

  • page_content_columns – Optional. The columns to write into the page_content of the document.

  • metadata_columns – Optional. The columns to write into the metadata of the document.

  • 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.

lazy_load() Iterator[Document]

A lazy loader for Documents.

load() List[Document][source]

Load data into Document objects.

load_and_split(text_splitter: Optional[TextSplitter] = None) List[Document]

Load Documents and split into chunks. Chunks are returned as Documents.

Parameters

text_splitter – TextSplitter instance to use for splitting documents. Defaults to RecursiveCharacterTextSplitter.

Returns

List of Documents.

Examples using BigQueryLoader