[tracker] SPARQL: Support single-valued properties as functions
- From: JĂźrg Billeter <juergbi src gnome org>
- To: svn-commits-list gnome org
- Cc:
- Subject: [tracker] SPARQL: Support single-valued properties as functions
- Date: Fri, 16 Oct 2009 10:02:04 +0000 (UTC)
commit 53becafc7b1ec935e7f88a3040f9e7eff5de8ae1
Author: Jürg Billeter <j bitron ch>
Date: Fri Oct 16 10:52:16 2009 +0200
SPARQL: Support single-valued properties as functions
Fixes NB#134107.
src/libtracker-data/tracker-sparql-query.vala | 12 +++++++++++-
1 files changed, 11 insertions(+), 1 deletions(-)
---
diff --git a/src/libtracker-data/tracker-sparql-query.vala b/src/libtracker-data/tracker-sparql-query.vala
index 6570650..404ca78 100644
--- a/src/libtracker-data/tracker-sparql-query.vala
+++ b/src/libtracker-data/tracker-sparql-query.vala
@@ -1206,7 +1206,17 @@ public class Tracker.SparqlQuery : Object {
return PropertyType.BOOLEAN;
} else {
- throw get_error ("Unknown function");
+ // support single valued properties as functions
+ var prop = Ontology.get_property_by_uri (uri);
+ if (prop == null || prop.multiple_values) {
+ throw get_error ("Unknown function");
+ }
+
+ sql.append_printf ("(SELECT \"%s\" FROM \"%s\" WHERE ID = ", prop.name, prop.domain.name);
+ translate_expression (sql);
+ sql.append (")");
+
+ return prop.data_type;
}
}
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