Runs a query.

        Example:
            >>> from google.cloud import firestore_v1beta1
            >>>
            >>> client = firestore_v1beta1.FirestoreClient()
            >>>
            >>> parent = client.any_path_path('[PROJECT]', '[DATABASE]', '[DOCUMENT]', '[ANY_PATH]')
            >>>
            >>> for element in client.run_query(parent):
            ...     # process element
            ...     pass

        Args:
            parent (str): The parent resource name. In the format:
                ``projects/{project_id}/databases/{database_id}/documents`` or
                ``projects/{project_id}/databases/{database_id}/documents/{document_path}``.
                For example: ``projects/my-project/databases/my-database/documents`` or
                ``projects/my-project/databases/my-database/documents/chatrooms/my-chatroom``
            structured_query (Union[dict, ~google.cloud.firestore_v1beta1.types.StructuredQuery]): A structured query.

                If a dict is provided, it must be of the same form as the protobuf
                message :class:`~google.cloud.firestore_v1beta1.types.StructuredQuery`
            transaction (bytes): Reads documents in a transaction.
            new_transaction (Union[dict, ~google.cloud.firestore_v1beta1.types.TransactionOptions]): Starts a new transaction and reads the documents.
                Defaults to a read-only transaction.
                The new transaction ID will be returned as the first response in the
                stream.

                If a dict is provided, it must be of the same form as the protobuf
                message :class:`~google.cloud.firestore_v1beta1.types.TransactionOptions`
            read_time (Union[dict, ~google.cloud.firestore_v1beta1.types.Timestamp]): Reads documents as they were at the given time.
                This may not be older than 60 seconds.

                If a dict is provided, it must be of the same form as the protobuf
                message :class:`~google.cloud.firestore_v1beta1.types.Timestamp`
            retry (Optional[google.api_core.retry.Retry]):  A retry object used
                to retry requests. If ``None`` is specified, requests will not
                be retried.
            timeout (Optional[float]): The amount of time, in seconds, to wait
                for the request to complete. Note that if ``retry`` is
                specified, the timeout applies to each individual attempt.
            metadata (Optional[Sequence[Tuple[str, str]]]): Additional metadata
                that is provided to the method.

        Returns:
            Iterable[~google.cloud.firestore_v1beta1.types.RunQueryResponse].

        Raises:
            google.api_core.exceptions.GoogleAPICallError: If the request
                    failed for any reason.
            google.api_core.exceptions.RetryError: If the request failed due
                    to a retryable error and retry attempts failed.
            ValueError: If the parameters are invalid.

def run_query(
        self,
        parent,
        structured_query=None,
        transaction=None,
        new_transaction=None,
        read_time=None,
        retry=google.api_core.gapic_v1.method.DEFAULT,
        timeout=google.api_core.gapic_v1.method.DEFAULT,
        metadata=None,
    ):
        """
        Runs a query.

        Example:
            >>> from google.cloud import firestore_v1beta1
            >>>
            >>> client = firestore_v1beta1.FirestoreClient()
            >>>
            >>> parent = client.any_path_path('[PROJECT]', '[DATABASE]', '[DOCUMENT]', '[ANY_PATH]')
            >>>
            >>> for element in client.run_query(parent):
            ...     # process element
            ...     pass

        Args:
            parent (str): The parent resource name. In the format:
                ``projects/{project_id}/databases/{database_id}/documents`` or
                ``projects/{project_id}/databases/{database_id}/documents/{document_path}``.
                For example: ``projects/my-project/databases/my-database/documents`` or
                ``projects/my-project/databases/my-database/documents/chatrooms/my-chatroom``
            structured_query (Union[dict, ~google.cloud.firestore_v1beta1.types.StructuredQuery]): A structured query.

                If a dict is provided, it must be of the same form as the protobuf
                message :class:`~google.cloud.firestore_v1beta1.types.StructuredQuery`
            transaction (bytes): Reads documents in a transaction.
            new_transaction (Union[dict, ~google.cloud.firestore_v1beta1.types.TransactionOptions]): Starts a new transaction and reads the documents.
                Defaults to a read-only transaction.
                The new transaction ID will be returned as the first response in the
                stream.

                If a dict is provided, it must be of the same form as the protobuf
                message :class:`~google.cloud.firestore_v1beta1.types.TransactionOptions`
            read_time (Union[dict, ~google.cloud.firestore_v1beta1.types.Timestamp]): Reads documents as they were at the given time.
                This may not be older than 60 seconds.

                If a dict is provided, it must be of the same form as the protobuf
                message :class:`~google.cloud.firestore_v1beta1.types.Timestamp`
            retry (Optional[google.api_core.retry.Retry]):  A retry object used
                to retry requests. If ``None`` is specified, requests will not
                be retried.
            timeout (Optional[float]): The amount of time, in seconds, to wait
                for the request to complete. Note that if ``retry`` is
                specified, the timeout applies to each individual attempt.
            metadata (Optional[Sequence[Tuple[str, str]]]): Additional metadata
                that is provided to the method.

        Returns:
            Iterable[~google.cloud.firestore_v1beta1.types.RunQueryResponse].

        Raises:
            google.api_core.exceptions.GoogleAPICallError: If the request
                    failed for any reason.
            google.api_core.exceptions.RetryError: If the request failed due
                    to a retryable error and retry attempts failed.
            ValueError: If the parameters are invalid.
        """
        # Wrap the transport method to add retry and timeout logic.
        if "run_query" not in self._inner_api_calls:
            self._inner_api_calls[
                "run_query"
            ] = google.api_core.gapic_v1.method.wrap_method(
                self.transport.run_query,
                default_retry=self._method_configs["RunQuery"].retry,
                default_timeout=self._method_configs["RunQuery"].timeout,
                client_info=self._client_info,
            )

        # Sanity check: We have some fields which are mutually exclusive;
        # raise ValueError if more than one is sent.
        google.api_core.protobuf_helpers.check_oneof(structured_query=structured_query)

        # Sanity check: We have some fields which are mutually exclusive;
        # raise ValueError if more than one is sent.
        google.api_core.protobuf_helpers.check_oneof(
            transaction=transaction,
            new_transaction=new_transaction,
            read_time=read_time,
        )

        request = firestore_pb2.RunQueryRequest(
            parent=parent,
            structured_query=structured_query,
            transaction=transaction,
            new_transaction=new_transaction,
            read_time=read_time,
        )
        if metadata is None:
            metadata = []
        metadata = list(metadata)
        try:
            routing_header = [("parent", parent)]
        except AttributeError:
            pass
        else:
            routing_metadata = google.api_core.gapic_v1.routing_header.to_grpc_metadata(
                routing_header
            )
            metadata.append(routing_metadata)

        return self._inner_api_calls["run_query"](
            request, retry=retry, timeout=timeout, metadata=metadata
        )