Method
TsparqlSparqlConnectionupdate_blank
deprecated: 3.5
Declaration [src]
GVariant*
tracker_sparql_connection_update_blank (
TrackerSparqlConnection* connection,
const gchar* sparql,
GCancellable* cancellable,
GError** error
)
Description [src]
Executes a SPARQL update and returns the names of the generated blank nodes.
This method is synchronous and will block until the update
is finished. See tracker_sparql_connection_update_blank_async()
for an asynchronous variant.
The sparql query should be built with TrackerResource, or
its parts correctly escaped using tracker_sparql_escape_string(),
otherwise SPARQL injection is possible.
The format string of the GVariant is aaa{ss} (an array of an array
of dictionaries). The first array represents each INSERT that may exist in
the SPARQL string. The second array represents each new node for a given
WHERE clause. The last array holds a string pair with the blank node name
(e.g. foo for the blank node _:foo) and the URN that was generated for
it. For most updates the first two outer arrays will only contain one item.
Deprecated since: 3.5
This function makes the expectation that blank nodes have a durable name that persist. The SPARQL and RDF specs define a much more reduced scope for blank node labels. This function advises a behavior that goes against that reduced scope, and will directly make the returned values meaningless if the #TRACKER_SPARQL_CONNECTION_FLAGS_ANONYMOUS_BNODES flag is defined in the connection.
Users that want names generated for them, should look for other methods (e.g. IRIs containing UUIDv4 strings).
Parameters
sparql-
Type:
const gchar*String containing the SPARQL update query.
The data is owned by the caller of the method. The value is a NUL terminated UTF-8 string. cancellable-
Type:
GCancellableOptional
GCancellable.The argument can be NULL.The data is owned by the caller of the method. error-
Type:
GError **The return location for a recoverable error.
The argument can be NULL.If the return location is not NULL, then you must initialize it to aNULLGError*.The argument will be left initialized to NULLby the method if there are no errors.In case of error, the argument will be set to a newly allocated GError; the caller will take ownership of the data, and be responsible for freeing it.