Index: app/helpers/queries_helper.rb
===================================================================
--- app/helpers/queries_helper.rb	(revision 11196)
+++ app/helpers/queries_helper.rb	(working copy)
@@ -90,7 +90,7 @@
     when 'Fixnum', 'Float'
       if column.name == :done_ratio
         progress_bar(value, :width => '80px')
-      elsif  column.name == :spent_hours
+      elsif  column.name == :spent_hours || column.name == :total_spent_hours
         sprintf "%.2f", value
       else
         h(value.to_s)
Index: app/models/query.rb
===================================================================
--- app/models/query.rb	(revision 11196)
+++ app/models/query.rb	(working copy)
@@ -470,8 +470,8 @@
       @available_columns.each_with_index {|column, i| index = i if column.name == :estimated_hours}
       index = (index ? index + 1 : -1)
       # insert the column after estimated_hours or at the end
-      @available_columns.insert index, QueryColumn.new(:spent_hours,
-        :sortable => "(SELECT COALESCE(SUM(hours), 0) FROM #{TimeEntry.table_name} WHERE #{TimeEntry.table_name}.issue_id = #{Issue.table_name}.id)",
+      @available_columns.insert index, QueryColumn.new(:total_spent_hours,
+        :sortable => "(SELECT COALESCE(SUM(hours), 0) FROM #{TimeEntry.table_name} time_entry LEFT JOIN #{Issue.table_name} child_issue ON time_entry.issue_id = child_issue.id WHERE #{TimeEntry.table_name}.issue_id = #{Issue.table_name}.id OR child_issue.parent_id IS NOT NULL)",
         :default_order => 'desc',
         :caption => :label_spent_time
       )