diff -r 000000000000 -r b97547f5f1fa goa/test/unittest_rql.py
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/goa/test/unittest_rql.py	Wed Nov 05 15:52:50 2008 +0100
@@ -0,0 +1,608 @@
+from cubicweb.goa.testlib import *
+
+from cubicweb import Binary
+
+from logilab.common.testlib import unittest_main
+from mx.DateTime import now, today, DateTimeType
+import rql
+
+from google.appengine.api.datastore_types import Blob, Text
+
+# stored procedure definition #################################################
+
+from rql.utils import register_function, FunctionDescr
+
+class itemtype_sort_value(FunctionDescr):
+    supported_backends = ('sqlite',)
+    rtype = 'Int'
+
+try:
+    register_function(itemtype_sort_value)
+except AssertionError:
+    pass
+
+def init_sqlite_connexion(cnx):
+    def itemtype_sort_value(text):
+        return {"personal":2, "business":1}[text]
+    cnx.create_function("ITEMTYPE_SORT_VALUE", 1, itemtype_sort_value)
+
+from cubicweb.server import SQL_CONNECT_HOOKS
+sqlite_hooks = SQL_CONNECT_HOOKS.setdefault('sqlite', [])
+sqlite_hooks.append(init_sqlite_connexion)
+
+# end stored procedure definition #############################################
+
+class Article(db.Model):        
+    content = db.TextProperty()
+    synopsis = db.StringProperty(default=u'hello')
+
+class Blog(db.Model):
+    diem = db.DateProperty(required=True, auto_now_add=True)
+    content = db.TextProperty()
+    itemtype = db.StringProperty(required=True, choices=(u'personal', u'business'))
+    talks_about = db.ReferenceProperty(Article) 
+    cites = db.SelfReferenceProperty() 
+    data = db.BlobProperty()
+
+    
+class RQLTest(GAEBasedTC):
+    MODEL_CLASSES = (Article, Blog)
+    
+    def setUp(self):
+        GAEBasedTC.setUp(self)
+        # hack to make talks_about cardinality to ** instead of ?*
+        self.schema.rschema('talks_about').set_rproperty('Blog', 'Article',
+                                                         'cardinality', '**')
+        self.req = self.request()
+        self.article = self.add_entity('Article', content=u'very interesting')
+        self.blog = self.add_entity('Blog', itemtype=u'personal', content=u'hop')
+        self.execute('SET X talks_about Y WHERE X eid %(x)s, Y eid %(y)s',
+                     {'x': self.blog.eid, 'y': self.article.eid})
+        self.commit()
+        
+    def _check_rset_size(self, rset, row, col):
+        self.assertEquals(len(rset), row)
+        self.assertEquals(len(rset[0]), col)
+        self.assertEquals(len(rset.description), row)
+        self.assertEquals(len(rset.description[0]), col)
+        
+    def _check_blog_rset(self, rset):
+        self._check_rset_size(rset, 1, 1)
+        self.assertEquals(rset.description[0][0], 'Blog')
+        self.assertEquals(rset[0][0], self.blog.eid)
+        self.assertEquals(rset.get_entity(0, 0).eid, self.blog.eid)
+
+    def test_0_const(self):
+        rset = self.req.execute('Any 1')
+        self._check_rset_size(rset, 1, 1)
+        self.assertEquals(rset[0][0], 1)
+        self.assertEquals(rset.description[0][0], 'Int')
+
+    def test_0_now_const(self):
+        rset = self.req.execute('Any NOW')
+        self._check_rset_size(rset, 1, 1)
+        self.assertIsInstance(rset[0][0], DateTimeType)
+        self.assertEquals(rset.description[0][0], 'Datetime')
+
+    def test_0_today_const(self):
+        rset = self.req.execute('Any TODAY')
+        self._check_rset_size(rset, 1, 1)
+        self.assertIsInstance(rset[0][0], DateTimeType)
+        self.assertEquals(rset[0][0], today())
+        self.assertEquals(rset.description[0][0], 'Date')
+
+
+    def test_1_eid(self):
+        rset = self.req.execute('Any X WHERE X eid %(x)s', {'x': self.blog.eid})
+        self._check_blog_rset(rset)
+        rset = self.req.execute('Any X WHERE X eid "%s"' % self.blog.eid)
+        self._check_blog_rset(rset)
+
+    def test_1_eid_eid(self):
+        rset = self.req.execute('Any X,Y WHERE X eid %(x)s, Y eid %(y)s', {'x': self.blog.eid,
+                                                                           'y': self.article.eid})
+        self._check_rset_size(rset, 1, 2)
+        self.assertEquals(rset.description[0], ('Blog', 'Article'))
+        self.assertEquals(rset[0][0], self.blog.eid)
+        self.assertEquals(rset[0][1], self.article.eid)
+
+    def test_1_eid_with_is(self):
+        self.assertRaises(rql.TypeResolverException,
+                          self.req.execute, 'Any X WHERE X eid %(x)s, X is Article', {'x': self.blog.eid})
+        rset = self.req.execute('Any X WHERE X eid %(x)s, X is Blog', {'x': self.blog.eid})
+        self._check_blog_rset(rset)
+
+    def test_1_is(self):
+        rset = self.req.execute('Any X WHERE X is Blog')
+        self._check_blog_rset(rset)
+        blog2 = Blog(itemtype=u'personal', content=u'hop')
+        blog2.put()
+        rset = self.req.execute('Any X WHERE X is Blog')
+        self.assertEquals(len(rset), 2)
+        self.assertEquals(rset.description, [('Blog',), ('Blog',)])
+
+        
+    def test_2_attribute_selection_1(self):
+        rset = self.req.execute('Any X,D,C WHERE X is Blog, X diem D, X content C')
+        self._check_rset_size(rset, 1, 3)
+        self.assertEquals(rset[0], [self.blog.eid, today(), u'hop'])
+        self.assertEquals(rset.description[0], ('Blog', 'Date', 'String'))
+        self.assertIsInstance(rset[0][1], DateTimeType)
+        
+    def test_2_attribute_selection_2(self):
+        rset = self.req.execute('Any D,C WHERE X is Blog, X diem D, X content C')
+        self._check_rset_size(rset, 1, 2)
+        self.assertEquals(rset[0], [today(), u'hop'])
+        self.assertEquals(rset.description[0], ('Date', 'String'))
+        
+    def test_2_attribute_selection_binary(self):
+        rset = self.req.execute('Any D WHERE X is Blog, X data D')
+        self._check_rset_size(rset, 1, 1)
+        self.assertEquals(rset[0], [None])
+        self.assertEquals(rset.description[0], ('Bytes',))
+        self.blog['data'] = Binary('raw data')
+        self.blog.put()
+        rset = self.req.execute('Any D WHERE X is Blog, X data D')
+        self._check_rset_size(rset, 1, 1)
+        self.assertIsInstance(rset[0][0], Binary)
+        value = rset[0][0].getvalue()
+        self.assertIsInstance(value, str)
+        self.failIf(isinstance(value, Blob)) 
+        self.assertEquals(value, 'raw data')
+        self.assertEquals(rset.description[0], ('Bytes',))
+        
+    def test_2_attribute_selection_long_text(self):
+        self.blog['content'] = text = 'a'*501
+        self.blog.put()
+        rset = self.req.execute('Any C WHERE X is Blog, X content C')
+        self._check_rset_size(rset, 1, 1)
+        self.assertIsInstance(rset[0][0], unicode)
+        self.failIf(isinstance(rset[0][0], Text)) 
+        self.assertEquals(rset[0][0], text)
+        
+    def test_2_attribute_selection_transformation(self):
+        rset = self.req.execute('Any X,UPPER(C) WHERE X is Blog, X content C')
+        self._check_rset_size(rset, 1, 2)
+        self.assertEquals(rset[0], [self.blog.eid, u'HOP'])
+        self.assertEquals(rset.description[0], ('Blog', 'String',))
+
+
+    def test_3_attribute_restriction(self):
+        rset = self.req.execute('Any X WHERE X itemtype "personal"')
+        self._check_blog_rset(rset)
+        rset = self.req.execute('Any X WHERE X itemtype "business"')
+        self.assertEquals(len(rset), 0)
+        
+    def test_3_ambigous_attribute_restriction_1(self):
+        rset = self.req.execute('Any X WHERE X content "hello"')
+        self.assertEquals(len(rset), 0)
+        
+    def test_3_ambigous_attribute_restriction_2(self):
+        rset = self.req.execute('Any X WHERE X content "hop"')
+        self._check_blog_rset(rset)
+        
+    def test_3_ambigous_attribute_restriction_3(self):
+        article = Article(content=u'hop')
+        article.put()
+        rset = self.req.execute('Any X WHERE X content "hop"')
+        self._check_rset_size(rset, 2, 1)
+        self.assertUnorderedIterableEquals([r[0] for r in rset], [self.blog.eid, article.eid])
+        self.assertUnorderedIterableEquals([r[0] for r in rset.description], ['Blog', 'Article'])
+
+    def test_3_incoherant_attribute_restriction(self):
+        rset = self.req.execute('Any X WHERE X eid %(x)s, X content "hola"',
+                                {'x': self.blog.eid})
+        self.assertEquals(len(rset), 0)
+        
+    def test_3_multiple_attribute_restriction(self):
+        rset = self.req.execute('Any X WHERE X content "hop", X itemtype "personal"')
+        self._check_blog_rset(rset)
+        
+    def test_3_incoherant_multiple_attribute_restriction(self):
+        rset = self.req.execute('Any X WHERE X content "hip", X itemtype "personal"')
+        self.assertEquals(len(rset), 0)
+
+    def test_3_today_attribute_restriction(self):
+        rset = self.req.execute('Any X WHERE X diem < TODAY')
+        self.assertEquals(len(rset), 0)
+        rset = self.req.execute('Any X WHERE X diem <= TODAY')
+        self._check_blog_rset(rset)
+        rset = self.req.execute('Any X WHERE X diem > TODAY')
+        self.assertEquals(len(rset), 0)
+        rset = self.req.execute('Any X WHERE X diem >= TODAY')
+        self._check_blog_rset(rset)
+
+    def test_3_now_attribute_restriction(self):
+        rset = self.req.execute('Any X WHERE X diem < NOW')
+        self._check_blog_rset(rset)
+        rset = self.req.execute('Any X WHERE X diem <= NOW')
+        self._check_blog_rset(rset)
+        rset = self.req.execute('Any X WHERE X diem > NOW')
+        self.assertEquals(len(rset), 0)
+        rset = self.req.execute('Any X WHERE X diem >= NOW')
+        self.assertEquals(len(rset), 0)
+
+    def test_3_in_attribute_restriction(self):
+        self.skip('missing actual gae support, retry latter')
+        article2 = Article(content=u'hip')
+        rset = self.req.execute('Any X WHERE X content IN ("hop", "hip")')
+        self._check_rset_size(rset, 2, 1)
+        self.assertUnorderedIterableEquals([r[0] for r in rset], [self.blog.eid, article.eid])
+        self.assertUnorderedIterableEquals([r[0] for r in rset.description], ['Blog', 'Article'])
+
+    def test_3_like(self):
+        repo = self.config.repository()
+        versions = repo.get_versions()
+        self.assertEquals(versions.keys(), ['cubicweb'])
+    
+    def _setup_relation_description(self):
+        self.article2 = self.add_entity('Article', content=u'hop')
+        self.blog2 = self.add_entity('Blog', itemtype=u'personal', content=u'hip')
+        self.execute('SET X talks_about Y WHERE X eid %(x)s, Y eid %(y)s',
+                     {'x': self.blog2.eid, 'y': self.article2.eid})
+        self.blog3 = self.add_entity('Blog', itemtype=u'business', content=u'hep')
+        self.commit()
+        
+    def test_4_relation_restriction_1(self):
+        self._setup_relation_description()
+        rset = self.req.execute('Any X WHERE X talks_about Y')
+        self._check_rset_size(rset, 2, 1)
+        self.assertUnorderedIterableEquals([r[0] for r in rset],
+                             [self.blog.eid, self.blog2.eid])
+        self.assertUnorderedIterableEquals([r[0] for r in rset.description], ['Blog', 'Blog'])
+        
+    def test_4_relation_restriction_2(self):
+        self._setup_relation_description()
+        rset = self.req.execute('Any Y WHERE X talks_about Y')
+        self._check_rset_size(rset, 2, 1)
+        self.assertUnorderedIterableEquals([r[0] for r in rset],
+                             [self.article.eid, self.article2.eid])
+        self.assertUnorderedIterableEquals([r[0] for r in rset.description],
+                             ['Article', 'Article'])
+        
+    def test_4_relation_restriction_3(self):
+        self._setup_relation_description()
+        rset = self.req.execute('Any X,Y WHERE X talks_about Y')
+        self._check_rset_size(rset, 2, 2)
+        self.assertUnorderedIterableEquals([tuple(r) for r in rset],
+                             [(self.blog.eid, self.article.eid),
+                              (self.blog2.eid, self.article2.eid)])
+        self.assertUnorderedIterableEquals([tuple(r) for r in rset.description],
+                             [('Blog', 'Article'),
+                              ('Blog', 'Article')])
+        
+    def test_4_relation_restriction_4(self):
+        self._setup_relation_description()
+        rset = self.req.execute('Any X,Y WHERE X talks_about Y, X eid %(x)s',
+                                {'x': self.blog.eid})
+        self._check_rset_size(rset, 1, 2)
+        self.assertEquals(rset[0], [self.blog.eid, self.article.eid])
+        self.assertUnorderedIterableEquals(rset.description[0], ['Blog', 'Article'])
+        
+    def test_4_relation_restriction_5(self):
+        self._setup_relation_description()
+        rset = self.req.execute('Any X,Y WHERE X talks_about Y, Y eid %(x)s',
+                                {'x': self.article.eid})
+        self._check_rset_size(rset, 1, 2)
+        self.assertEquals(rset[0], [self.blog.eid, self.article.eid])
+        self.assertUnorderedIterableEquals(rset.description[0], ['Blog', 'Article'])
+        
+    def test_4_relation_subject_restriction(self):
+        self._setup_relation_description()
+        rset = self.req.execute('Any X,Y WHERE X talks_about Y, X content %(c)s',
+                                {'c': 'hop'})
+        self._check_rset_size(rset, 1, 2)
+        self.assertEquals(rset[0], [self.blog.eid, self.article.eid])
+        self.assertUnorderedIterableEquals(rset.description[0], ['Blog', 'Article'])
+        
+    def test_4_relation_object_restriction(self):
+        self._setup_relation_description()
+        rset = self.req.execute('Any X WHERE X is Blog, X talks_about Y, Y content %(c)s',
+                                {'c': 'very interesting'})
+        self._check_rset_size(rset, 1, 1)
+        self.assertEquals(rset[0], [self.blog.eid])
+        self.assertUnorderedIterableEquals(rset.description[0], ['Blog'])
+        
+    def test_4_relation_subject_object_restriction(self):
+        article2 = self.add_entity('Article', content=u'very interesting')
+        rset = self.req.execute('Any X,XC WHERE X is Blog, X content XC, X content %(xc)s, '
+                                'X talks_about Y, Y content %(c)s',
+                                {'xc': 'hop', 'c': 'very interesting'})
+        self._check_rset_size(rset, 1, 2)
+        self.assertEquals(rset[0], [self.blog.eid, self.blog.content])
+        self.assertUnorderedIterableEquals(rset.description[0], ['Blog', 'String'])
+        
+    def test_4_relation_subject_object_restriction_no_res(self):
+        article2 = self.add_entity('Article', content=u'very interesting')
+        rset = self.req.execute('Any X,XC WHERE X is Blog, X content XC, X content %(xc)s, '
+                                'X talks_about Y, Y content %(c)s',
+                                {'xc': 'hip', 'c': 'very interesting'})
+        self.assertEquals(len(rset), 0)
+        
+    def test_4_relation_subject_object_restriction_no_res_2(self):
+        rset = self.req.execute('Any X,XC WHERE X is Blog, X content XC, X content %(xc)s, '
+                                'X talks_about Y, Y content %(c)s',
+                                {'xc': 'hop', 'c': 'not interesting'})
+        self.assertEquals(len(rset), 0)
+        
+    def test_4_relation_restriction_7(self):
+        self._setup_relation_description()
+        rset = self.req.execute('Any XC,XD,YC WHERE X talks_about Y, Y eid %(x)s,'
+                                'X content XC, X diem XD, Y content YC',
+                                {'x': self.article.eid})
+        self._check_rset_size(rset, 1, 3)
+        self.assertEquals(rset[0], [self.blog.content, self.blog.diem, self.article.content])
+        self.assertUnorderedIterableEquals(rset.description[0], ['String', 'Date', 'String'])
+        
+    def test_4_relation_restriction_8(self):
+        self._setup_relation_description()
+        rset = self.req.execute('Any X,Y WHERE X cites Y, Y eid %(x)s', {'x': self.blog.eid})
+        self.assertEquals(len(rset), 0)
+
+    def test_4_relation_restriction_9(self):
+        article2 = self.add_entity('Article', content=u'hop')
+        self.req.execute('SET X talks_about Y WHERE X eid %(x)s, Y eid %(y)s',
+                         {'x': self.blog.eid, 'y': article2.eid})
+        rset = self.req.execute('Any X,Y WHERE X talks_about Y, X eid %(x)s, Y eid %(y)s',
+                                {'x': self.blog.eid, 'y': article2.eid})
+        self._check_rset_size(rset, 1, 2)
+        
+    def test_4_ambiguous_subject_relation(self):
+        ye = self.add_entity('YamsEntity')
+        self.req.execute('SET X ambiguous_relation Y WHERE X eid %(x)s, Y eid %(y)s',
+                         {'x': ye.eid, 'y': self.blog.eid})
+        self.req.execute('SET X ambiguous_relation Y WHERE X eid %(x)s, Y eid %(y)s',
+                         {'x': ye.eid, 'y': self.article.eid})
+        self.commit()
+        #ye = self.vreg.etype_class('YamsEntity ')(req, None)
+        #ye.to_gae_model()['s_ambiguous_relation'] = [self.blog.key(), self.article.key()]
+        #ye.put()
+        rset = self.req.execute('Any X WHERE Y ambiguous_relation X')
+        self._check_rset_size(rset, 2, 1)
+        self.assertUnorderedIterableEquals([r[0] for r in rset], [self.blog.eid, self.article.eid])
+        self.assertUnorderedIterableEquals([r[0] for r in rset.description], ['Blog', 'Article'])
+        rset = self.req.execute('Any X WHERE Y ambiguous_relation X, Y eid %(x)s', {'x': ye.eid})
+        self._check_rset_size(rset, 2, 1)
+        self.assertUnorderedIterableEquals([r[0] for r in rset], [self.blog.eid, self.article.eid])
+        self.assertUnorderedIterableEquals([r[0] for r in rset.description], ['Blog', 'Article'])
+        
+    def test_4_relation_selection(self):
+        req = self.request()
+        rset = req.execute('Any N WHERE G content N, U talks_about G, U eid %(u)s', {'u': self.blog.eid})
+        self._check_rset_size(rset, 1, 1)
+        self.assertEquals(rset[0][0], 'very interesting')
+
+
+    def test_5_orderby(self):
+        self._setup_relation_description()
+        rset = self.req.execute('Any X,XC ORDERBY XC WHERE X is Blog, X content XC')
+        self._check_rset_size(rset, 3, 2)
+        self.assertEquals(rset.rows,
+                          [[self.blog3.eid, 'hep'],
+                           [self.blog2.eid, 'hip'],
+                           [self.blog.eid, 'hop']])
+                           
+    def test_5_orderby_desc(self):
+        self._setup_relation_description()
+        rset = self.req.execute('Any X,XC ORDERBY XC DESC WHERE X is Blog, X content XC')
+        self._check_rset_size(rset, 3, 2)
+        self.assertEquals(rset.rows,
+                          [[self.blog.eid, 'hop'],
+                           [self.blog2.eid, 'hip'],
+                           [self.blog3.eid, 'hep']])
+
+    def test_5_orderby_several_terms(self):
+        self._setup_relation_description()
+        rset = self.req.execute('Any X,XC,XI ORDERBY XI,XC WHERE X is Blog, X content XC, X itemtype XI')
+        self._check_rset_size(rset, 3, 3)
+        self.assertEquals(rset.rows,
+                          [[self.blog3.eid, 'hep', 'business'],
+                           [self.blog2.eid, 'hip', 'personal'],
+                           [self.blog.eid, 'hop', 'personal']])
+
+    def test_5_orderby_several_terms_mixed_implicit(self):
+        self._setup_relation_description()
+        rset = self.req.execute('Any X,XC,XI ORDERBY XI,XC DESC WHERE X is Blog, X content XC, X itemtype XI')
+        self._check_rset_size(rset, 3, 3)
+        self.assertEquals(rset.rows,
+                          [[self.blog3.eid, 'hep', 'business'],
+                           [self.blog.eid, 'hop', 'personal'],
+                           [self.blog2.eid, 'hip', 'personal']])
+
+    def test_5_orderby_several_terms_explicit_order(self):
+        self._setup_relation_description()
+        rset = self.req.execute('Any X,XC,XI ORDERBY XI DESC,XC DESC WHERE X is Blog, X content XC, X itemtype XI')
+        self._check_rset_size(rset, 3, 3)
+        self.assertEquals(rset.rows,
+                          [[self.blog.eid, 'hop', 'personal'],
+                           [self.blog2.eid, 'hip', 'personal'],
+                           [self.blog3.eid, 'hep', 'business']])
+        
+    def test_5_orderby_several_terms_mixed_order(self):
+        self._setup_relation_description()
+        rset = self.req.execute('Any X,XC,XI ORDERBY XI ASC,XC DESC WHERE X is Blog, X content XC, X itemtype XI')
+        self._check_rset_size(rset, 3, 3)
+        self.assertEquals(rset.rows,
+                          [[self.blog3.eid, 'hep', 'business'],
+                           [self.blog.eid, 'hop', 'personal'],
+                           [self.blog2.eid, 'hip', 'personal']])
+
+
+    def test_5_orderby_lower(self):
+        blog2 = self.add_entity('Blog', itemtype=u'business', content=u'Hup')
+        rset = self.req.execute('Any X ORDERBY LOWER(XC) '
+                                'WHERE X is Blog, X content XC')
+        self._check_rset_size(rset, 2, 1)
+        self.assertEquals(rset.rows, [[self.blog.eid], [blog2.eid]])
+        rset = self.req.execute('Any X ORDERBY LOWER(XC) DESC'
+                                'WHERE X is Blog, X content XC')
+        self._check_rset_size(rset, 2, 1)
+        self.assertEquals(rset.rows, [[blog2.eid], [self.blog.eid]])
+
+    def test_5_orderby_stored_proc(self):
+        blog2 = self.add_entity('Blog', itemtype=u'business', content=u'hop')
+        rset = self.req.execute('Any X ORDERBY ITEMTYPE_SORT_VALUE(XIT) '
+                                'WHERE X is Blog, X itemtype XIT')
+        self._check_rset_size(rset, 2, 1)
+        self.assertEquals(rset.rows, [[blog2.eid], [self.blog.eid]])
+        rset = self.req.execute('Any X ORDERBY ITEMTYPE_SORT_VALUE(XIT) DESC'
+                                'WHERE X is Blog, X itemtype XIT')
+        self._check_rset_size(rset, 2, 1)
+        self.assertEquals(rset.rows, [[self.blog.eid], [blog2.eid]])
+                          
+        
+    def test_6_limit(self):
+        self._setup_relation_description()
+        rset = self.req.execute('Any X LIMIT 2 WHERE X is Blog')
+        self._check_rset_size(rset, 2, 1)
+        
+    def test_6_offset(self):
+        self._setup_relation_description()
+        rset = self.req.execute('Any XC ORDERBY XC DESC OFFSET 1 WHERE X is Blog, X content XC')
+        self._check_rset_size(rset, 2, 1)
+        self.assertEquals(rset.rows, [['hip'], ['hep']])
+        
+    def test_6_limit_and_orderby(self):
+        self._setup_relation_description()
+        rset = self.req.execute('Any XC ORDERBY XC LIMIT 2 WHERE X is Blog, X content XC')
+        self._check_rset_size(rset, 2, 1)
+        self.assertEquals(rset.rows, [['hep'], ['hip']])
+        
+    def test_6_limit_offset_and_orderby(self):
+        self._setup_relation_description()
+        rset = self.req.execute('Any XC ORDERBY XC LIMIT 2 OFFSET 0 WHERE X is Blog, X content XC')
+        self._check_rset_size(rset, 2, 1)
+        self.assertEquals(rset.rows, [['hep'], ['hip']])
+        rset = self.req.execute('Any XC ORDERBY XC LIMIT 2 OFFSET 1 WHERE X is Blog, X content XC')
+        self._check_rset_size(rset, 2, 1)
+        self.assertEquals(rset.rows, [['hip'], ['hop']])
+        rset = self.req.execute('Any XC ORDERBY XC LIMIT 2 OFFSET 2 WHERE X is Blog, X content XC')
+        self._check_rset_size(rset, 1, 1)
+        self.assertEquals(rset.rows, [['hop']])
+        rset = self.req.execute('Any XC ORDERBY XC LIMIT 2 OFFSET 3 WHERE X is Blog, X content XC')
+        self.failIf(rset)
+        
+
+    def test_7_simple_datetimecast(self):
+        self._setup_relation_description()
+        _today = today()
+        _tomorrow = _today + 1
+        rset = self.req.execute('Any X WHERE X is Blog, X creation_date >= "%s"'
+                                % _tomorrow.strftime('%Y-%m-%d'))
+        self.failUnless(len(rset) == 0)
+        rset = self.req.execute('Any X WHERE X is Blog, X creation_date >= "%s"'
+                                % _today.strftime('%Y-%m-%d'))
+        self._check_rset_size(rset, 3, 1)
+        rset = self.req.execute('Any X WHERE X is Blog, X creation_date <= "%s"'
+                                % _tomorrow.strftime('%Y-%m-%d'))
+        self._check_rset_size(rset, 3, 1)
+        
+    def test_7_identity_relation(self):
+        rset = self.req.execute('Any X WHERE X identity Y, X eid %(x)s, Y eid %(y)s',
+                                {'x': self.user.eid, 'y': self.user.eid})
+        self._check_rset_size(rset, 1, 1)
+        rset = self.req.execute('Any Y WHERE X identity Y, X eid %(x)s',
+                                {'x': self.user.eid})
+        self._check_rset_size(rset, 1, 1)
+        self.assertEquals(rset.rows, [[self.user.eid]])
+        blog2 = self.add_entity('Blog', itemtype=u'personal', content=u'hip')
+        rset = self.req.execute('Any X WHERE X identity Y, X eid %(x)s, Y eid %(y)s',
+                                {'x': self.blog.eid, 'y': blog2.eid})
+        self.failIf(rset)
+        
+    def test_8_not_relation_1(self):
+        rset = self.req.execute('Any X WHERE X identity U, NOT U in_group G, '
+                                'G name "guests", X eid %(x)s, U eid %(u)s',
+                                {'x': self.user.eid, 'u': self.user.eid})
+        self._check_rset_size(rset, 1, 1)
+        self.assertEquals(rset.rows, [[self.user.eid]])        
+
+    def test_8_not_relation_linked_subject(self):
+        rset = self.req.execute('Any X WHERE NOT X talks_about Y, Y eid %(y)s',
+                                {'y': self.article.eid})
+        self.failIf(rset)
+        blog2 = self.add_entity('Blog', content=u'hop', itemtype=u'personal')
+        self.commit()
+        rset = self.req.execute('Any X WHERE NOT X talks_about Y, Y eid %(y)s',
+                                {'y': self.article.eid})        
+        self._check_rset_size(rset, 1, 1)
+        self.assertEquals(rset.rows, [[blog2.eid]])
+
+    def test_8_not_relation_linked_object(self):
+        rset = self.req.execute('Any Y WHERE NOT X talks_about Y, X eid %(x)s',
+                                {'x': self.blog.eid})
+        self.failIf(rset)
+        article2 = self.add_entity('Article', content=u'hop')
+        self.commit()
+        rset = self.req.execute('Any Y WHERE NOT X talks_about Y, X eid %(x)s',
+                                {'x': self.blog.eid})
+        self._check_rset_size(rset, 1, 1)
+        self.assertEquals(rset.rows, [[article2.eid]])
+
+    def test_8_not_relation_linked_attr(self):
+        self.skip('not yet implemented')
+        # TODO: this should generated 
+        # Query(X)[s_talks_about] > "hop" || Query(X)[s_talks_about] < "hop"
+        article2 = self.add_entity('Article', content=u'hop')
+        self.req.execute('SET X talks_about Y WHERE X eid %(x)s, Y eid %(y)s',
+                         {'x': self.blog.eid, 'y': article2.eid})
+        self.commit()
+        rset = self.req.execute('Any X WHERE NOT X talks_about Y, Y content "hop"')
+        self._check_rset_size(rset, 1, 2)
+        self.assertEquals(rset.rows, [[self.blog.eid, self.article.eid]])
+
+    def test_8_not_relation_unlinked_subject(self):
+        blog2 = self.add_entity('Blog', content=u'hop', itemtype=u'personal')
+        self.commit()
+        rset = self.req.execute('Any X WHERE NOT X talks_about Y')
+        self._check_rset_size(rset, 1, 1)
+        self.assertEquals(rset.rows, [[blog2.eid]])
+
+    def test_8_not_relation_unlinked_object(self):
+        article2 = self.add_entity('Article', content=u'hop')
+        self.commit()
+        rset = self.req.execute('Any Y WHERE NOT X talks_about Y')
+        self._check_rset_size(rset, 1, 1)
+        self.assertEquals(rset.rows, [[article2.eid]])
+        
+    def test_8_not_relation_final_1(self):
+        rset = self.req.execute('Any G WHERE G is EGroup, NOT G name "guests"')
+        self._check_rset_size(rset, 2, 1)
+        self.assertUnorderedIterableEquals([g.name for g in rset.entities()],
+                                           ['users', 'managers'])        
+        
+    def test_8_not_relation_final_2(self):
+        rset = self.req.execute('Any GN WHERE G is EGroup, NOT G name "guests", G name GN')
+        self._check_rset_size(rset, 2, 1)
+        self.assertUnorderedIterableEquals([gn for gn, in rset.rows],
+                                           ['users', 'managers'])
+
+
+    def test_9_exists(self):
+        blog2 = self.add_entity('Article', content=u'hop')
+        article2 = self.add_entity('Article', content=u'hop')
+        self.req.execute('SET X talks_about Y WHERE X eid %(x)s, Y eid %(y)s',
+                         {'x': self.blog.eid, 'y': article2.eid})
+        self.commit()
+        rset = self.req.execute('Any X WHERE X is Blog, EXISTS(X talks_about Y)')
+        self._check_rset_size(rset, 1, 1)
+        self.assertEquals(rset.rows, [[self.blog.eid]])
+        
+        
+    def test_error_unknown_eid(self):
+        rset = self.req.execute('Any X WHERE X eid %(x)s', {'x': '1234'})
+        self.assertEquals(len(rset), 0)
+        self.blog.delete()
+        rset = self.req.execute('Any X WHERE X eid %(x)s', {'x': self.blog.eid})
+        self.assertEquals(len(rset), 0)
+
+    def test_nonregr_inlined_relation(self):
+        eid = self.execute('INSERT YamsEntity X: X inlined_relation Y WHERE Y eid %(y)s',
+                           {'y': self.blog.eid})[0][0]
+        self.commit()
+        rset = self.execute('Any X WHERE Y inlined_relation X, Y eid %(y)s', {'y': eid})
+        self._check_rset_size(rset, 1, 1)
+        self.assertEquals(rset[0][0], self.blog.eid)
+        
+if __name__ == '__main__':
+    unittest_main()