sql

@define
class BaseSqlDriver(ABC):
    @dataclass
    class RowResult:
        cells: dict[str, Any]

    @abstractmethod
    def execute_query(self, query: str) -> Optional[list[RowResult]]: ...

    @abstractmethod
    def execute_query_raw(self, query: str) -> Optional[list[dict[str, Any]]]: ...

    @abstractmethod
    def get_table_schema(self, table_name: str, schema: Optional[str] = None) -> Optional[str]: ...

@dataclass
class RowResult:
    cells: dict[str, Any]

@abstractmethod
def execute_query(self, query: str) -> Optional[list[RowResult]]: ...

@abstractmethod
def execute_query_raw(self, query: str) -> Optional[list[dict[str, Any]]]: ...

@abstractmethod
def get_table_schema(self, table_name: str, schema: Optional[str] = None) -> Optional[str]: ...

@define
class SqlDriver(BaseSqlDriver):
    engine_url: str = field(kw_only=True)
    create_engine_params: dict = field(factory=dict, kw_only=True)
    _engine: Optional[Engine] = field(default=None, kw_only=True, alias="engine", metadata={"serializable": False})

    @lazy_property()
    def engine(self) -> Engine:
        return import_optional_dependency("sqlalchemy").create_engine(self.engine_url, **self.create_engine_params)

    def execute_query(self, query: str) -> Optional[list[BaseSqlDriver.RowResult]]:
        rows = self.execute_query_raw(query)

        if rows:
            return [BaseSqlDriver.RowResult(row) for row in rows]
        return None

    def execute_query_raw(self, query: str) -> Optional[list[dict[str, Optional[Any]]]]:
        sqlalchemy = import_optional_dependency("sqlalchemy")

        with self.engine.connect() as con:
            results = con.execute(sqlalchemy.text(query))

            if results is not None:
                if results.returns_rows:
                    return [dict(result._mapping) for result in results]
                con.commit()
                return None
            raise ValueError("No result found")

    def get_table_schema(self, table_name: str, schema: Optional[str] = None) -> Optional[str]:
        sqlalchemy_exc = import_optional_dependency("sqlalchemy.exc")

        try:
            return str(SqlDriver._get_table_schema(self.engine, table_name, schema))
        except sqlalchemy_exc.NoSuchTableError:
            return None

    @staticmethod
    @lru_cache
    def _get_table_schema(
        engine: Engine, table_name: str, schema: Optional[str] = None
    ) -> Optional[list[tuple[str, str]]]:
        sqlalchemy = import_optional_dependency("sqlalchemy")

        return [(col["name"], col["type"]) for col in sqlalchemy.inspect(engine).get_columns(table_name, schema=schema)]

@staticmethod
@lru_cache
def _get_table_schema(
    engine: Engine, table_name: str, schema: Optional[str] = None
) -> Optional[list[tuple[str, str]]]:
    sqlalchemy = import_optional_dependency("sqlalchemy")

    return [(col["name"], col["type"]) for col in sqlalchemy.inspect(engine).get_columns(table_name, schema=schema)]

@lazy_property()
def engine(self) -> Engine:
    return import_optional_dependency("sqlalchemy").create_engine(self.engine_url, **self.create_engine_params)

def execute_query(self, query: str) -> Optional[list[BaseSqlDriver.RowResult]]:
    rows = self.execute_query_raw(query)

    if rows:
        return [BaseSqlDriver.RowResult(row) for row in rows]
    return None

def execute_query_raw(self, query: str) -> Optional[list[dict[str, Optional[Any]]]]:
    sqlalchemy = import_optional_dependency("sqlalchemy")

    with self.engine.connect() as con:
        results = con.execute(sqlalchemy.text(query))

        if results is not None:
            if results.returns_rows:
                return [dict(result._mapping) for result in results]
            con.commit()
            return None
        raise ValueError("No result found")

def get_table_schema(self, table_name: str, schema: Optional[str] = None) -> Optional[str]:
    sqlalchemy_exc = import_optional_dependency("sqlalchemy.exc")

    try:
        return str(SqlDriver._get_table_schema(self.engine, table_name, schema))
    except sqlalchemy_exc.NoSuchTableError:
        return None