[[["Easy to understand","easyToUnderstand","thumb-up"],["Solved my problem","solvedMyProblem","thumb-up"],["Other","otherUp","thumb-up"]],[["Hard to understand","hardToUnderstand","thumb-down"],["Incorrect information or sample code","incorrectInformationOrSampleCode","thumb-down"],["Missing the information/samples I need","missingTheInformationSamplesINeed","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2025-08-13 UTC."],[],[],null,["# Class BigtableChatMessageHistory (0.6.0)\n\nVersion latestkeyboard_arrow_down\n\n- [0.6.0 (latest)](/python/docs/reference/langchain-google-bigtable/latest/langchain_google_bigtable.chat_message_history.BigtableChatMessageHistory)\n- [0.5.0](/python/docs/reference/langchain-google-bigtable/0.5.0/langchain_google_bigtable.chat_message_history.BigtableChatMessageHistory)\n- [0.4.4](/python/docs/reference/langchain-google-bigtable/0.4.4/langchain_google_bigtable.chat_message_history.BigtableChatMessageHistory)\n- [0.3.1](/python/docs/reference/langchain-google-bigtable/0.3.1/langchain_google_bigtable.chat_message_history.BigtableChatMessageHistory)\n- [0.2.3](/python/docs/reference/langchain-google-bigtable/0.2.3/langchain_google_bigtable.chat_message_history.BigtableChatMessageHistory) \n\n BigtableChatMessageHistory(\n instance_id: str,\n table_id: str,\n session_id: str,\n client: typing.Optional[google.cloud.bigtable.client.Client] = None,\n )\n\nChat message history that stores history in Bigtable.\n\nProperties\n----------\n\n### messages\n\nRetrieve all session messages from DB\n\nMethods\n-------\n\n### add_message\n\n add_message(message: langchain_core.messages.base.BaseMessage) -\u003e None\n\nWrite a message to the table\n\n### add_messages\n\n add_messages(\n messages: typing.Sequence[langchain_core.messages.base.BaseMessage],\n ) -\u003e None\n\nWrite messages to the table\n\n### clear\n\n clear() -\u003e None\n\nClear session memory from DB"]]