[zope2-tracker] [Bug 143917] Re: Memory leak in Shared.DC.ZRDB.Results.SQLAlias

[Tres Seaver]

The attached module has a Results class which provides a much stripped-down
form of the one in Shared.DC.ZRDB.Results.  In particular:

 - It doesn't alias column names (the source of the memory leak).

 - It provides much more efficient mapping of a row index into a
   dictionary keyed by column name.

It loses a bunch of seldom used features of the original class (methods not
implemented).

To deal with the weird calling convention Shared.DC.ZRDB.DA uses to create
results, it contains a factory function, 'makeZRDBResults', which expects
to be passed a single tuple, (items, data).

You should be able to monkey-patch this factory in via something like::

  import Shared.DC.ZRDB.Connection
  Shared.DC.ZRDB.Connection.Results = makeZRDBResults
  import Shared.DC.ZRDB.DA
  Shared.DC.ZRDB.DA.Results = makeZRDBResults


** Attachment added: "simple_rdb_results.py"
   http://launchpadlibrarian.net/38537913/simple_rdb_results.py

-- 
Memory leak in Shared.DC.ZRDB.Results.SQLAlias
https://bugs.launchpad.net/bugs/143917
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