SYNOPSIS

          mongoc_cursor_t *
          mongoc_database_find_collections_with_opts (mongoc_database_t *database,
                                                      const bson_t *opts)
             BSON_GNUC_WARN_UNUSED_RESULT;

       Fetches  a  cursor  containing  documents,  each  corresponding  to  a  collection on this
       database.

       To get collection names only, use mongoc_database_get_collection_names_with_opts().

       This function is considered a retryable read operation.  Upon a transient error (a network
       error, errors due to replica set failover, etc.) the operation is safely retried once.  If
       retryreads is false in the URI (see mongoc_uri_t) the retry behavior does not apply.

PARAMETERS

       • database: A mongoc_database_t.

       • opts: A bson_t containing additional options.

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

       • sessionId:       First,       construct       a       mongoc_client_session_t       with
         mongoc_client_start_session().      You     can     begin     a     transaction     with
         mongoc_client_session_start_transaction(), optionally  with  a  mongoc_transaction_opt_t
         that     overrides     the     options     inherited     from    database,    and    use
         mongoc_client_session_append() to add the session to opts.  See  the  example  code  for
         mongoc_client_session_t.

       • serverId:  To target a specific server, include an int32 "serverId" field. Obtain the id
         by calling mongoc_client_select_server(),  then  mongoc_server_description_id()  on  its
         return value.

       For a list of all options, see the MongoDB Manual entry on the listCollections command.

ERRORS

       Use mongoc_cursor_error() on the returned cursor to check for errors.

RETURNS

       This  function  returns  a  newly  allocated  mongoc_cursor_t  that  should  be freed with
       mongoc_cursor_destroy() when no longer in use. The returned mongoc_cursor_t is never NULL,
       even  on error. The user must call mongoc_cursor_next() on the returned mongoc_cursor_t to
       execute the initial command.

       Cursor errors can be checked with mongoc_cursor_error_document(). It always fills out  the
       bson_error_t  if an error occurred, and optionally includes a server reply document if the
       error occurred server-side.

       WARNING:
          Failure to handle the result of this function is a programming error.

       In the returned cursor each  result  corresponds  to  the  server's  representation  of  a
       collection in this database.

       The   cursor   functions  mongoc_cursor_set_limit(),  mongoc_cursor_set_batch_size(),  and
       mongoc_cursor_set_max_await_time_ms() have no use on the returned cursor.

EXAMPLES

          {
             bson_t opts = BSON_INITIALIZER;
             bson_t name_filter;
             const bson_t *doc;
             bson_iter_t iter;
             bson_error_t error;
             mongoc_cursor_t *cursor;

             BSON_APPEND_DOCUMENT_BEGIN (&opts, "filter", &name_filter);
             /* find collections with names like "abbbbc" */
             BSON_APPEND_REGEX (&name_filter, "name", "ab+c", NULL);
             bson_append_document_end (&opts, &name_filter);

             cursor = mongoc_database_find_collections_with_opts (database, &opts);
             while (mongoc_cursor_next (cursor, &doc)) {
                bson_iter_init_find (&iter, doc, "name");
                printf ("found collection: %s\n", bson_iter_utf8 (&iter, NULL));
             }

             if (mongoc_cursor_error (cursor, &error)) {
                fprintf (stderr, "%s\n", error.message);
             }

             mongoc_cursor_destroy (cursor);
             bson_destroy (&opts);
          }

       SEE ALSO:
          mongoc_database_get_collection_names_with_opts()

AUTHOR

       MongoDB, Inc

COPYRIGHT

       2017-present, MongoDB, Inc

1.26.0                                     Mar 31, 2MONGOC_DATABASE_FIND_COLLECTIONS_WITH_OPTS(3)