[tracker/tracker-0.10] libtracker-data: Performance improvement for REPLACE support

[Martyn James Russell <mr src gnome org>]

commit bf3337bfbbb07c0ea61cfc0b4daacf2308fd9e34
Author: Philip Van Hoof <philip codeminded be>
Date:   Fri Mar 11 16:34:01 2011 +0100

    libtracker-data: Performance improvement for REPLACE support
    
    Don't lookup the object-id in case no class in the known types of
    the subject has tracker:notify: the only reason why we look this
    old object-id up is for GraphUpdated at this moment.

 src/libtracker-data/tracker-data-update.c |   54 +++++++++++++++++++---------
 1 files changed, 36 insertions(+), 18 deletions(-)
---
diff --git a/src/libtracker-data/tracker-data-update.c b/src/libtracker-data/tracker-data-update.c
index b6ad04f..6f128d6 100644
--- a/src/libtracker-data/tracker-data-update.c
+++ b/src/libtracker-data/tracker-data-update.c
@@ -2658,33 +2658,51 @@ tracker_data_update_statement_with_uri (const gchar            *graph,
 		GValueArray *old_values;
 		gboolean multiple_values;
 		GError *new_error = NULL;
+		gboolean domain_unchecked = TRUE;
 
 		multiple_values = tracker_property_get_multiple_values (property);
 
 		/* We can disable correct object-id for deletes array here */
 		if (!multiple_values) {
-			/* This does a check_property_domain too */
-			old_values = get_old_property_values (property, &new_error);
-			if (!new_error) {
-				if (old_values->n_values > 0) {
-					/* evel knievel cast */
-					old_object_id = (guint) g_value_get_int64 (g_value_array_get_nth (old_values, 0));
+			guint r;
+
+			for (r = 0; r < resource_buffer->types->len; r++) {
+				TrackerClass *m_class = g_ptr_array_index (resource_buffer->types, r);
+
+				/* We only do the old_values for GraphUpdated in tracker-store.
+				 * The subject's known classes are in resource_buffer->types
+				 * since resource_buffer_switch, so we can quickly check if any
+				 * of them has tracker:notify annotated. If so, get the old
+				 * values for the old_object_id */
+
+				if (tracker_class_get_notify (m_class)) {
+					/* This does a check_property_domain too */
+					old_values = get_old_property_values (property, &new_error);
+					domain_unchecked = FALSE;
+					if (!new_error) {
+						if (old_values->n_values > 0) {
+							/* evel knievel cast */
+							old_object_id = (guint) g_value_get_int64 (g_value_array_get_nth (old_values, 0));
+						}
+					} else {
+						g_propagate_error (error, new_error);
+						return;
+					}
+
+					break;
 				}
-			} else {
-				g_propagate_error (error, new_error);
-				return;
-			}
-		} else {
-			if (!check_property_domain (property)) {
-				g_set_error (error, TRACKER_SPARQL_ERROR, TRACKER_SPARQL_ERROR_CONSTRAINT,
-				             "Subject `%s' is not in domain `%s' of property `%s'",
-				             resource_buffer->subject,
-				             tracker_class_get_name (tracker_property_get_domain (property)),
-				             tracker_property_get_name (property));
-				return;
 			}
 		}
 
+		if (domain_unchecked && !check_property_domain (property)) {
+			g_set_error (error, TRACKER_SPARQL_ERROR, TRACKER_SPARQL_ERROR_CONSTRAINT,
+			             "Subject `%s' is not in domain `%s' of property `%s'",
+			             resource_buffer->subject,
+			             tracker_class_get_name (tracker_property_get_domain (property)),
+			             tracker_property_get_name (property));
+			return;
+		}
+
 		/* update or add value to metadata database */
 		change = cache_update_metadata_decomposed (property, object, 0, graph, 0, &actual_error);
 		if (actual_error) {