mongoc_database_find_collections_with_opts

mongoc_database_find_collections_with_opts()

Synopsis

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

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

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

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

A cursor where 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;

   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.msg);
   }

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

See Also

mongoc_database_get_collection_names_with_opts()

Author

MongoDB, Inc

Info

Apr 09, 2021 1.17.5 libmongoc