--- a/server/session.py	Mon Sep 17 17:48:02 2012 +0200
+++ b/server/session.py	Tue Sep 11 22:32:01 2012 +0200
@@ -1107,71 +1107,6 @@
             self._threaddata._rewriter = RQLRewriter(self)
             return self._threaddata._rewriter
 
-    def build_description(self, rqlst, args, result):
-        """build a description for a given result"""
-        if len(rqlst.children) == 1 and len(rqlst.children[0].solutions) == 1:
-            # easy, all lines are identical
-            selected = rqlst.children[0].selection
-            solution = rqlst.children[0].solutions[0]
-            description = _make_description(selected, args, solution)
-            return RepeatList(len(result), tuple(description))
-        # hard, delegate the work :o)
-        return self.manual_build_descr(rqlst, args, result)
-
-    def manual_build_descr(self, rqlst, args, result):
-        """build a description for a given result by analysing each row
-
-        XXX could probably be done more efficiently during execution of query
-        """
-        # not so easy, looks for variable which changes from one solution
-        # to another
-        unstables = rqlst.get_variable_indices()
-        basedescr = []
-        todetermine = []
-        for i in xrange(len(rqlst.children[0].selection)):
-            ttype = selection_idx_type(i, rqlst, args)
-            if ttype is None or ttype == 'Any':
-                ttype = None
-                isfinal = True
-            else:
-                isfinal = ttype in BASE_TYPES
-            if ttype is None or i in unstables:
-                basedescr.append(None)
-                todetermine.append( (i, isfinal) )
-            else:
-                basedescr.append(ttype)
-        if not todetermine:
-            return RepeatList(len(result), tuple(basedescr))
-        return self._build_descr(result, basedescr, todetermine)
-
-    def _build_descr(self, result, basedescription, todetermine):
-        description = []
-        etype_from_eid = self.describe
-        todel = []
-        for i, row in enumerate(result):
-            row_descr = basedescription[:]
-            for index, isfinal in todetermine:
-                value = row[index]
-                if value is None:
-                    # None value inserted by an outer join, no type
-                    row_descr[index] = None
-                    continue
-                if isfinal:
-                    row_descr[index] = etype_from_pyobj(value)
-                else:
-                    try:
-                        row_descr[index] = etype_from_eid(value)[0]
-                    except UnknownEid:
-                        self.error('wrong eid %s in repository, you should '
-                                   'db-check the database' % value)
-                        todel.append(i)
-                        break
-            else:
-                description.append(tuple(row_descr))
-        for i in reversed(todel):
-            del result[i]
-        return description
-
     # deprecated ###############################################################
 
     @deprecated('[3.13] use getattr(session.rtype_eids_rdef(rtype, eidfrom, eidto), prop)')

--- a/server/test/unittest_session.py	Mon Sep 17 17:48:02 2012 +0200
+++ b/server/test/unittest_session.py	Tue Sep 11 22:32:01 2012 +0200
@@ -1,4 +1,4 @@
-# copyright 2003-2011 LOGILAB S.A. (Paris, FRANCE), all rights reserved.
+# copyright 2003-2012 LOGILAB S.A. (Paris, FRANCE), all rights reserved.
 # contact http://www.logilab.fr/ -- mailto:contact@logilab.fr
 #
 # This file is part of CubicWeb.
@@ -63,27 +63,6 @@
         self.assertEqual(session.disabled_hook_categories, set())
         self.assertEqual(session.enabled_hook_categories, set())
 
-    def test_build_descr1(self):
-        rset = self.execute('(Any U,L WHERE U login L) UNION (Any G,N WHERE G name N, G is CWGroup)')
-        orig_length = len(rset)
-        rset.rows[0][0] = 9999999
-        description = self.session.build_description(rset.syntax_tree(), None, rset.rows)
-        self.assertEqual(len(description), orig_length - 1)
-        self.assertEqual(len(rset.rows), orig_length - 1)
-        self.assertFalse(rset.rows[0][0] == 9999999)
-
-    def test_build_descr2(self):
-        rset = self.execute('Any X,Y WITH X,Y BEING ((Any G,NULL WHERE G is CWGroup) UNION (Any U,G WHERE U in_group G))')
-        for x, y in rset.description:
-            if y is not None:
-                self.assertEqual(y, 'CWGroup')
-
-    def test_build_descr3(self):
-        rset = self.execute('(Any G,NULL WHERE G is CWGroup) UNION (Any U,G WHERE U in_group G)')
-        for x, y in rset.description:
-            if y is not None:
-                self.assertEqual(y, 'CWGroup')
-
 
 if __name__ == '__main__':
     unittest_main()