Executes asynchronously a SPARQL query on this
If the query is partially built from user input or other untrusted sources, special care is required about possible SPARQL injection. In order to avoid it entirely, it is recommended to use [class@SparqlStatement]. The function [func@sparql_escape_string] exists as a last resort, but its use is not recommended.
| this |
A `TrackerSparqlConnection` |
| sparql |
String containing the SPARQL query |
| cancellable |
Optional [type@Gio.Cancellable] |
| callback |
User-defined [type@Gio.AsyncReadyCallback] to be called when the asynchronous operation is finished. |
| user_data |
User-defined data to be passed to |