Fix the tests

python/crankshaft/crankshaft/poc/xyz.py

@@ -2,5 +2,5 @@ import plpy
 
 def xyz():
     plpy.notice('XYZ...')
-    r = plpy.execute("SELECT * FROM table")
-    return r[0]['x']
+    r = plpy.execute("select * from pg_class where relname='pg_class'")
+    return r[0]['reltype']

python/crankshaft/test/test_poc.py

@@ -18,6 +18,6 @@ class TestPoc(unittest.TestCase):
         plpy._reset()
 
     def test_should_have_xyz(self):
-        plpy._define_result('select\s+\*\s+from\s+table', [{'x': 111}])
+        plpy._define_result('select.*from\s+pg_class', [{'reltype': 111}])
         assert crankshaft.poc.xyz() == 111
         assert plpy.notices[0] == 'XYZ...'