[tracker/parser] Putting ASK support back in place

[Philip Van Hoof <pvanhoof src gnome org>]

commit d0d84c043db0a5240d15eb51cb65436af8be8554
Author: Philip Van Hoof <philip codeminded be>
Date:   Wed Aug 5 17:04:43 2009 +0200

    Putting ASK support back in place

 src/libtracker-data/tracker-sparql-query.vala |   13 ++++++++-----
 1 files changed, 8 insertions(+), 5 deletions(-)
---
diff --git a/src/libtracker-data/tracker-sparql-query.vala b/src/libtracker-data/tracker-sparql-query.vala
index b5db457..da6851e 100644
--- a/src/libtracker-data/tracker-sparql-query.vala
+++ b/src/libtracker-data/tracker-sparql-query.vala
@@ -337,8 +337,6 @@ public class Tracker.SparqlQuery : Object {
 	}
 #endif
 
-	private bool is_ask { get; set; }
-
 	inline bool next () {
 		index = (index + 1) % BUFFER_SIZE;
 		size--;
@@ -432,7 +430,6 @@ public class Tracker.SparqlQuery : Object {
 			} else if (current () == SparqlTokenType.DESCRIBE) {
 				throw new SparqlError.INTERNAL ("DESCRIBE is not supported");
 			} else if (current () == SparqlTokenType.ASK) {
-				is_ask = true;
 				return execute_select ();
 			} else {
 				throw new SparqlError.PARSE ("DELETE and INSERT are not supported in query mode");
@@ -508,7 +505,9 @@ public class Tracker.SparqlQuery : Object {
 	}
 
 	DBResultSet? execute_select () throws Error {
-		// SELECT query
+		bool is_ask = false;
+
+		// SELECT or ASK query
 
 		pattern_sql = new StringBuilder ();
 		var_map = new HashTable<string,VariableBinding>.full (str_hash, str_equal, g_free, g_object_unref);
@@ -520,7 +519,11 @@ public class Tracker.SparqlQuery : Object {
 		var sql = new StringBuilder ();
 		sql.append ("SELECT ");
 
-		expect (SparqlTokenType.SELECT);
+		if (accept (SparqlTokenType.ASK)) {
+			is_ask = true;
+		} else { 
+			expect (SparqlTokenType.SELECT);
+		}
 
 		if (accept (SparqlTokenType.DISTINCT)) {
 			sql.append ("DISTINCT ");