[tracker] libtracker-data: Support fn:replace()

[Carlos Garnacho <carlosg src gnome org>]

commit 5d777e6ede90ec9e63546ea0ad988a809ca24798
Author: Carlos Garnacho <carlosg gnome org>
Date:   Mon Mar 9 20:50:22 2015 +0100

    libtracker-data: Support fn:replace()
    
    In a limited form, no regex support.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=745917

 src/libtracker-data/tracker-sparql-expression.vala |   16 ++++++++++++++++
 1 files changed, 16 insertions(+), 0 deletions(-)
---
diff --git a/src/libtracker-data/tracker-sparql-expression.vala 
b/src/libtracker-data/tracker-sparql-expression.vala
index e11930f..8633b20 100644
--- a/src/libtracker-data/tracker-sparql-expression.vala
+++ b/src/libtracker-data/tracker-sparql-expression.vala
@@ -678,6 +678,22 @@ class Tracker.Sparql.Expression : Object {
                        sql.append (")");
 
                        return PropertyType.INTEGER;
+               } else if (uri == FN_NS + "replace") {
+                       sql.append ("replace(");
+                       translate_expression_as_string (sql);
+                       sql.append (", ");
+
+                       expect (SparqlTokenType.COMMA);
+                       translate_expression_as_string (sql);
+                       sql.append (", ");
+
+                       expect (SparqlTokenType.COMMA);
+                       translate_expression_as_string (sql);
+
+                       // FIXME: No regex (nor its modifier flags) support
+                       sql.append (")");
+
+                       return PropertyType.STRING;
                } else if (uri == FTS_NS + "rank") {
                        bool is_var;
                        string v = pattern.parse_var_or_term (null, out is_var);