[Python-Dev] bsddb

[Jesus Cea]

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Oleg Broytmann wrote:
>    Once I upgraded Python on a Windows computer... I think it was 2.2 to
> 2.3 upgrade - and all my bsddb databases stopped working. I cannot call
> this "improvement". I didn't have db_upgarde on that computer (or I didn't
> know about it). Does PyBSDDB have db_upgrade in the distribution? Does
> Python distribution have db_upgrade?

I can't comment about bsddb status before my maintenance era (since
March or so). But current release:

http://www.jcea.es/programacion/pybsddb_doc/db.html#upgrade

"""
[jcea at tesalia Modules]$ grep -i upgrade *
_bsddb.c:DB_upgrade(DBObject* self, PyObject* args)
_bsddb.c:    if (!PyArg_ParseTuple(args,"s|i:upgrade", &filename, &flags))
_bsddb.c:    err = self->db->upgrade(self->db, filename, flags);
_bsddb.c:    MAKE_ENTRY(nupgrade);
_bsddb.c:    {"upgrade",         (PyCFunction)DB_upgrade,
METH_VARARGS},
_bsddb.c:    ADD_INT(d, DB_UPGRADE);
_bsddb.c:    ADD_INT(d, DB_LOCK_UPGRADE);
_bsddb.c:    ADD_INT(d, DB_LOCK_UPGRADE_WRITE);
_bsddb.c:    ADD_INT(d, DB_LOCK_UPGRADE);
"""

>> Following your reasoning, Python should be
>> keep in 1.0 era, for compatibility sake.
> 
>    Python? No. But persistent data structures? Yes! How many different
> pickle data formats there were since Python 1.0? What is the oldest
> pickle format modern Python can read? (Just using pickle as an example.)

Modern bsddb can read relic bsddb data; just do a "db_upgrade".

>>> -- SQLite implements a subset of SQL - a powerful query language;
>> Yes, a declarative language completely unrelated to Python.
> 
>    Sometimes being unrelated to Python is advantage.

No argument here. My brain just work that way :).

- --
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