220                 def cursor(self, txn=None) :  argument
221                     return cursor_py3k(self._db.cursor(txn=txn))
223                 def has_key(self, key, txn=None) :  argument
225                             txn=txn)
227                 def put(self, key, value, flags=0, txn=None) :  argument
231                     return self._db.put(key, value, flags=flags, txn=txn)
233                 def put_bytes(self, key, value, txn=None) :  argument
235                     return self._db.put(key, value, txn=txn)
237                 def get(self, key, txn=None, flags=0) :  argument
239                     v = self._db.get(key, txn=txn, flags=flags)
244                 def get_bytes(self, key, txn=None, flags=0) :  argument
246                     return self._db.get(key, txn=txn, flags=flags)
248                 def delete(self, key, txn=None) :  argument
250                     return self._db.delete(key, txn=txn)
260         txn = self.env.txn_begin()
262             if not getattr(self.db, "has_key")(_table_names_key, txn):
264                         (_table_names_key, pickle.dumps([], 1), txn=txn)
267             txn.abort()
270             txn.commit()
316         txn = None
332             txn = self.env.txn_begin()
335                     pickle.dumps(columns, 1), txn=txn)
339                 self.db.get) (_table_names_key, txn=txn, flags=db.DB_RMW))
342             self.db.delete(_table_names_key, txn=txn)
344                     pickle.dumps(tablelist, 1), txn=txn)
346             txn.commit()
347             txn = None
349             if txn:
350                 txn.abort()
398             txn = None
401                 txn = self.env.txn_begin()
406                         self.db.get)(columnlist_key, txn=txn, flags=db.DB_RMW))
423                     self.db.delete(columnlist_key, txn=txn)
426                                 txn=txn)
428                 txn.commit()
429                 txn = None
433                 if txn:
434                     txn.abort()
453     def __new_rowid(self, table, txn) :  argument
470                 self.db.put(_rowid_key(table, newid), None, txn=txn,
485         txn = None
498             txn = self.env.txn_begin()
499             rowid = self.__new_rowid(table, txn=txn)
504                 self.db.put(_data_key(table, column, rowid), dataitem, txn=txn)
506             txn.commit()
507             txn = None
515             if txn:
516                 txn.abort()
542                 txn = None
545                         txn = self.env.txn_begin()
550                                 txn=txn)
553                                 txn=txn)
562                                 dataitem, txn=txn)
563                         txn.commit()
564                         txn = None
568                     if txn:
569                         txn.abort()
593                 txn = None
595                     txn = self.env.txn_begin()
600                                            txn=txn)
606                         self.db.delete(_rowid_key(table, rowid), txn=txn)
610                     txn.commit()
611                     txn = None
613                     if txn:
614                         txn.abort()
785         txn = None
787             txn = self.env.txn_begin()
790             self.db.delete(_columns_key(table), txn=txn)
792             cur = self.db.cursor(txn)
823                     txn=txn, flags=db.DB_RMW))
830             self.db.delete(_table_names_key, txn=txn)
832                     pickle.dumps(tablelist, 1), txn=txn)
834             txn.commit()
835             txn = None
841             if txn:
842                 txn.abort()