NAME

       mongoc_manage_collection_indexes - Manage Collection Indexes

       To        create        indexes       on       a       MongoDB       collection,       use
       mongoc_collection_create_indexes_with_opts():

          // `keys` represents an ascending index on field `x`.
          bson_t *keys = BCON_NEW ("x", BCON_INT32 (1));
          mongoc_index_model_t *im = mongoc_index_model_new (keys, NULL /* opts */);
          if (mongoc_collection_create_indexes_with_opts (
                 coll, &im, 1, NULL /* opts */, NULL /* reply */, &error)) {
             printf ("Successfully created index\n");
          } else {
             bson_destroy (keys);
             HANDLE_ERROR ("Failed to create index: %s", error.message);
          }
          bson_destroy (keys);

       To list indexes, use mongoc_collection_find_indexes_with_opts():

          mongoc_cursor_t *cursor =
             mongoc_collection_find_indexes_with_opts (coll, NULL /* opts */);
          printf ("Listing indexes:\n");
          const bson_t *got;
          while (mongoc_cursor_next (cursor, &got)) {
             char *got_str = bson_as_canonical_extended_json (got, NULL);
             printf ("  %s\n", got_str);
             bson_free (got_str);
          }
          if (mongoc_cursor_error (cursor, &error)) {
             mongoc_cursor_destroy (cursor);
             HANDLE_ERROR ("Failed to list indexes: %s", error.message);
          }
          mongoc_cursor_destroy (cursor);

       To drop an index, use mongoc_collection_drop_index_with_opts().  The  index  name  may  be
       obtained from the keys document with mongoc_collection_keys_to_index_string():

          bson_t *keys = BCON_NEW ("x", BCON_INT32 (1));
          char *index_name = mongoc_collection_keys_to_index_string (keys);
          if (mongoc_collection_drop_index_with_opts (
                 coll, index_name, NULL /* opts */, &error)) {
             printf ("Successfully dropped index\n");
          } else {
             bson_free (index_name);
             bson_destroy (keys);
             HANDLE_ERROR ("Failed to drop index: %s", error.message);
          }
          bson_free (index_name);
          bson_destroy (keys);

       For a full example, see example-manage-collection-indexes.c.

AUTHOR

       MongoDB, Inc

COPYRIGHT

       2017-present, MongoDB, Inc