[[["Easy to understand","easyToUnderstand","thumb-up"],["Solved my problem","solvedMyProblem","thumb-up"],["Other","otherUp","thumb-up"]],[["Missing the information I need","missingTheInformationINeed","thumb-down"],["Too complicated / too many steps","tooComplicatedTooManySteps","thumb-down"],["Out of date","outOfDate","thumb-down"],["Samples / code issue","samplesCodeIssue","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2025-08-28 UTC."],[],[],null,["# Module engine (0.12.0)\n\nVersion latestkeyboard_arrow_down\n\n- [0.12.0 (latest)](/python/docs/reference/langchain-google-alloydb-pg/latest/langchain_google_alloydb_pg.engine)\n- [0.11.0](/python/docs/reference/langchain-google-alloydb-pg/0.11.0/langchain_google_alloydb_pg.engine)\n- [0.10.0](/python/docs/reference/langchain-google-alloydb-pg/0.10.0/langchain_google_alloydb_pg.engine)\n- [0.9.3](/python/docs/reference/langchain-google-alloydb-pg/0.9.3/langchain_google_alloydb_pg.engine)\n- [0.8.0](/python/docs/reference/langchain-google-alloydb-pg/0.8.0/langchain_google_alloydb_pg.engine)\n- [0.7.0](/python/docs/reference/langchain-google-alloydb-pg/0.7.0/langchain_google_alloydb_pg.engine)\n- [0.6.0](/python/docs/reference/langchain-google-alloydb-pg/0.6.0/langchain_google_alloydb_pg.engine)\n- [0.5.0](/python/docs/reference/langchain-google-alloydb-pg/0.5.0/langchain_google_alloydb_pg.engine)\n- [0.4.1](/python/docs/reference/langchain-google-alloydb-pg/0.4.1/langchain_google_alloydb_pg.engine)\n- [0.3.0](/python/docs/reference/langchain-google-alloydb-pg/0.3.0/langchain_google_alloydb_pg.engine)\n- [0.2.2](/python/docs/reference/langchain-google-alloydb-pg/0.2.2/langchain_google_alloydb_pg.engine) \nAPI documentation for `engine` module.\n\nClasses\n-------\n\n### [AlloyDBEngine](/python/docs/reference/langchain-google-alloydb-pg/latest/langchain_google_alloydb_pg.engine.AlloyDBEngine)\n\n AlloyDBEngine(\n key: object,\n pool: sqlalchemy.ext.asyncio.engine.AsyncEngine,\n loop: typing.Optional[asyncio.events.AbstractEventLoop],\n thread: typing.Optional[threading.Thread],\n )\n\nA class for managing connections to a AlloyDB database.\n\n### [Column](/python/docs/reference/langchain-google-alloydb-pg/latest/langchain_google_alloydb_pg.engine.Column)\n\n Column(name: \"str\", data_type: \"str\", nullable: \"bool\" = True)\n\nColumn(name: 'str', data_type: 'str', nullable: 'bool' = True)\n\nModules\nFunctions\n-----------------\n\n### _get_iam_principal_email\n\n _get_iam_principal_email(credentials: google.auth.credentials.Credentials) -\u003e str\n\nGet email address associated with current authenticated IAM principal.\n\nEmail will be used for automatic IAM database authentication to AlloyDB."]]