Log message for revision 40426:
  Recreate the BTrees.Length.Length instance on a clear, like UnIndex-based
  indexes do; this way one can simply re-catalog a site upgraded from a Zope 2.7
  instance.
  

Changed:
  U   Zope/trunk/lib/python/Products/PluginIndexes/DateIndex/DateIndex.py

-=-
Modified: Zope/trunk/lib/python/Products/PluginIndexes/DateIndex/DateIndex.py
===================================================================
--- Zope/trunk/lib/python/Products/PluginIndexes/DateIndex/DateIndex.py 
2005-11-30 07:01:03 UTC (rev 40425)
+++ Zope/trunk/lib/python/Products/PluginIndexes/DateIndex/DateIndex.py 
2005-11-30 11:26:29 UTC (rev 40426)
@@ -20,6 +20,7 @@
 from datetime import tzinfo, timedelta
 from types import StringType, FloatType, IntType
 
+import BTrees.Length
 from BTrees.IIBTree import IISet, union, intersection, multiunion
 from BTrees.IOBTree import IOBTree
 from BTrees.OIBTree import OIBTree
@@ -111,7 +112,7 @@
         """ Complete reset """
         self._index = IOBTree()
         self._unindex = OIBTree()
-        self._length.set(0)
+        self._length = BTrees.Length.Length()
 
     def index_object( self, documentId, obj, threshold=None ):
         """index an object, normalizing the indexed value to an integer

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