SYNOPSIS

          void
          mongoc_client_set_read_prefs (mongoc_client_t *client,
                                        const mongoc_read_prefs_t *read_prefs);

       Sets the default read preferences to use with future operations upon client.

       The global default is to read from the replica set primary.

       It  is  a  programming error to call this function on a client from a mongoc_client_pool_t <>. For pooled
       clients, set the read preferences with the MongoDB URI <#mongoc-uri-t-read-prefs-options> instead.

       Please see the MongoDB website for  a  description  of  Read  Preferences  <https://www.mongodb.com/docs/
       manual/core/read-preference/>.

PARAMETERS

       • client: A mongoc_client_t <>.

       • read_prefs: A mongoc_read_prefs_t <>.

Author

       MongoDB, Inc

Copyright

       2009-present, MongoDB, Inc.

2.2.1                                             Dec 11, 2025                   MONGOC_CLIENT_SET_READ_PREFS(3)