bool

       MongoDB, Inc

       2009-present, MongoDB, Inc.

1.30.4                                            Jun 08, 2025               MONGOC_COLLECTION_COMMAND_SIMPLE(3)

       This  is  a  simplified  version of mongoc_collection_command() that returns the first result document in
       reply. The collection's read preference, read concern, and write concern are not applied to the  command.
       The parameter reply is initialized even upon failure to simplify memory management.

       This function tries to unwrap an embedded error in the command when possible. The unwrapped error will be
       propagated via the error parameter. Additionally, the result document is set in reply.

       This function is not considered a retryable read operation.

       Errors are propagated via the error parameter.

       The following is an example of executing the ping command.

          #include <bson/bson.h>
          #include <mongoc/mongoc.h>
          #include <stdio.h>

          static void
          do_ping (mongoc_collection_t *collection)
          {
             bson_error_t error;
             bson_t *cmd;
             bson_t reply;
             char *str;

             cmd = BCON_NEW ("ping", BCON_INT32 (1));

             if (mongoc_collection_command_simple (collection, cmd, NULL, &reply, &error)) {
                str = bson_as_canonical_extended_json (&reply, NULL);
                printf ("Got reply: %s\n", str);
                bson_free (str);
             } else {
                fprintf (stderr, "Got error: %s\n", error.message);
             }

             bson_destroy (&reply);
             bson_destroy (cmd);
          }

       • collection: A mongoc_collection_t.

       • command: A bson_t containing the command to execute.

       • read_prefs: An optional mongoc_read_prefs_t. Otherwise, the command uses mode MONGOC_READ_PRIMARY.

       • reply: A maybe-NULL pointer to overwritablestorage for a bson_t to contain the results.

       • error: An optional location for a bson_error_t or NULL.

       Returns  true  if  successful. Returns false and sets error if there are invalid arguments or a server or
       network error.

       This function does not check the server response for a write concern error or write concern timeout.

          bool
          mongoc_collection_command_simple (mongoc_collection_t *collection,
                                            const bson_t *command,
                                            const mongoc_read_prefs_t *read_prefs,
                                            bson_t *reply,
                                            bson_error_t *error);