Run ONE read-only SQL statement against a hosted app's own PostgreSQL database, in the PostgreSQL SQL dialect (https://www.postgresql.org/docs/current/sql.html). Writes are refused by the database itself. Returns immediately with a runId; the rows are fetched with get_query_result. Table and column names come from get_app_database_schema, because the app's schema is its own, not ours.
ConnectorOAuth