SPARQL: Support DELETE WHERE {...}

The DELETE WHERE operation is a short form where the pattern is also
used as the template for deletion. Syntax is specified in current
SPARQL 1.1 Update draft.

1 files changed, 9 insertions, 2 deletions

diff --git a/src/libtracker-data/tracker-sparql-query.vala b/src/libtracker-data/tracker-sparql-query.vala
index ad45abed3..cab27790f 100644
--- a/src/libtracker-data/tracker-sparql-query.vala
+++ b/src/libtracker-data/tracker-sparql-query.vala
@@ -656,9 +656,16 @@ public class Tracker.Sparql.Query : Object {
 		var template_location = get_location ();
 
 		if (!data) {
-			skip_braces ();
+			// DELETE WHERE is a short form where the pattern is also used as the template for deletion
+			bool delete_where = accept (SparqlTokenType.WHERE);
 
-			if (accept (SparqlTokenType.WHERE)) {
+			if (delete_where) {
+				template_location = get_location ();
+			} else {
+				skip_braces ();
+			}
+
+			if (delete_where || accept (SparqlTokenType.WHERE)) {
 				pattern.current_graph = current_graph;
 				context = pattern.translate_group_graph_pattern (pattern_sql);
 				pattern.current_graph = null;