Package Classes (0.4.1)

Summary of entries of Classes for langchain-google-spanner.

Classes

SpannerChatMessageHistory

Chat message history that stores history in Spanner.

Column

Column(name: str, data_type: str, nullable: bool = True)

SpannerDocumentSaver

Save docs to Google Cloud Spanner.

SpannerLoader

Loads data from Google Cloud Spanner.

DialectSemantics

Abstract base class for dialect semantics.

DistanceStrategy

Enum for distance calculation strategies.

GoogleSqlSemnatics

Implementation of dialect semantics for Google SQL.

PGSqlSemnatics

Implementation of dialect semantics for PostgreSQL.

QueryParameters

Class representing query parameters for nearest neighbors search.

NearestNeighborsAlgorithm

Enum for nearest neighbors search algorithms.

SecondaryIndex

SecondaryIndex(index_name: 'str', columns: 'list[str]', storing_columns: 'Optional[list[str]]' = None)

SpannerVectorStore

Initialize the SpannerVectorStore.

Parameters:

  • instance_id (str): The ID of the Spanner instance.
  • database_id (str): The ID of the Spanner database.
  • table_name (str): The name of the table.
  • embedding_service (Embeddings): The embedding service.
  • id_column (str): The name of the row ID column. Defaults to ID_COLUMN_NAME.
  • content_column (str): The name of the content column. Defaults to CONTENT_COLUMN_NAME.
  • embedding_column (str): The name of the embedding column. Defaults to EMBEDDING_COLUMN_NAME.
  • client (Client): The Spanner client. Defaults to Client().
  • metadata_columns (Optional[List[str]]): List of metadata columns. Defaults to None.
  • ignore_metadata_columns (Optional[List[str]]): List of metadata columns to ignore. Defaults to None.
  • metadata_json_column (Optional[str]): The generic metadata column. Defaults to None.
  • query_parameters (QueryParameters): The query parameters. Defaults to QueryParameters().

TableColumn

Represents column configuration, to be used as part of create DDL statement for table creation.

Modules

chat_message_history

Cloud Spanner-based chat message history

loader

API documentation for loader module.

vector_store

API documentation for vector_store module.