Remove use of volatile attribute.

Code calling this method in this class already cache their own result,
and it is not part of the API (so it should not be directly accessed).

git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@37183 20353a03-c40f-0410-a6d1-a30d3c3de9de

product/ZSQLCatalog/SQLCatalog.py

@@ -814,10 +814,6 @@ class Catalog(Folder,
       # Add a dummy item so that SQLCatalog will not use existing uids again.
       self.insertMaxUid()
 
-    # Remove the cache of catalog schema.
-    if hasattr(self, '_v_catalog_schema_dict') :
-      del self._v_catalog_schema_dict
-
     self._clearSecurityCache()
 
   def insertMaxUid(self):
@@ -909,28 +905,19 @@ class Catalog(Folder,
     return self.sql_search_result_keys
 
   def _getCatalogSchema(self, table=None):
-    # XXX: Using a volatile as a cache makes it impossible to flush
-    # consistently on all connections containing the volatile. Another
-    # caching scheme must be used here.
-    catalog_schema_dict = getattr(aq_base(self), '_v_catalog_schema_dict', {})
-
-    if table not in catalog_schema_dict:
-      result_list = []
-      try:
-        method_name = self.sql_catalog_schema
-        method = getattr(self, method_name)
-        search_result = method(table=table)
-        for c in search_result:
-          result_list.append(c.Field)
-      except ConflictError:
-        raise
-      except:
-        LOG('SQLCatalog', WARNING, '_getCatalogSchema failed with the method %s' % method_name, error=sys.exc_info())
-        pass
-      catalog_schema_dict[table] = tuple(result_list)
-      self._v_catalog_schema_dict= catalog_schema_dict
-
-    return catalog_schema_dict[table]
+    result_list = []
+    try:
+      method_name = self.sql_catalog_schema
+      method = getattr(self, method_name)
+      search_result = method(table=table)
+      for c in search_result:
+        result_list.append(c.Field)
+    except ConflictError:
+      raise
+    except:
+      LOG('SQLCatalog', WARNING, '_getCatalogSchema failed with the method %s' % method_name, error=sys.exc_info())
+      pass
+    return tuple(result_list)
 
   @caching_instance_method(id='SQLCatalog.getColumnIds',
                            cache_factory='erp5_content_long')