[Chris Withers]
>>> ZCatalog still contains a commit(1) at around line 589 of ZCatalog.py,
>>> which is causing the familiar 'Savepoints unsupported' error for us :-(
>>> Would there be any problem changing this to a savepoint(optimistic=True)
>>> on the 2.8 branch and trunk?

[Tim Peters]
>> There shouldn't be any problem -- go for it.  I see that the 2.8
>> branch already uses transaction.savepoint() here, but should probably
>> use transaction.savepoint(optimistic=True) instead.

> Done.

Looks good.  Thanks!

>> In the other direction, I see that zope/app/file/file.py still
>> contains two subtxn commits on 2.8 branch, but not anymore on the
>> trunk.  That should also be changed on 2.8 branch.

> Hmm, that smells Zope 3-ish to me, and my Zope checkout links that in by
> svn:externals, so I'll leave that for someone more Zope 3-savy...

Ah, yes.  That should go away by magic then if/when someone stitches
in a newer version of whichever Zope3 2.8 branch is using.  Or not
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