
..
   Generated with build/generate-opts.py
   DO NOT EDIT THIS FILE

``opts`` may be NULL or a BSON document with additional command options:

* ``readConcern``: Construct a :symbol:`mongoc_read_concern_t` and use :symbol:`mongoc_read_concern_append` to add the read concern to ``opts``. See the example code for :symbol:`mongoc_client_read_command_with_opts`. Read concern requires MongoDB 3.2 or later, otherwise an error is returned.
* ``sessionId``: First, construct a :symbol:`mongoc_client_session_t` with :symbol:`mongoc_client_start_session`. You can begin a transaction with :symbol:`mongoc_client_session_start_transaction`, optionally with a :symbol:`mongoc_transaction_opt_t` that overrides the options inherited from |opts-source|, and use :symbol:`mongoc_client_session_append` to add the session to ``opts``. See the example code for :symbol:`mongoc_client_session_t`.
* ``collation``: Configure textual comparisons. See `Setting Collation Order <setting_collation_order_>`_, and `the MongoDB Manual entry on Collation <https://www.mongodb.com/docs/manual/reference/collation/>`_. Collation requires MongoDB 3.2 or later, otherwise an error is returned.
* ``serverId``: To target a specific server, include an int32 "serverId" field. Obtain the id by calling :symbol:`mongoc_client_select_server`, then :symbol:`mongoc_server_description_id` on its return value.
* ``skip``: An int specifying how many documents matching the ``query`` should be skipped before counting.
* ``limit``: An int specifying the maximum number of documents to count.
* ``comment``: A :symbol:`bson_value_t` specifying the comment to attach to this command. The comment will appear in log messages, profiler output, and currentOp output. Only string values are supported prior to MongoDB 4.4.
* ``hint``: A document or string that specifies the index to use to support the query predicate.
