Savepoint or subtransaction support

Hi,

I'd like to use savepoints or subtransactions. Now PyPgSQL does not seem 
to support them.

Searching through the archives brought up a bug [1] and a feature 
request at [2] for savepoint support. Another guy run into the same 
problem as I did, but his solution seems dubious, see [3].

What's PyPgSQL's state concerning subtransactions or savepoints? What 
does the Python DB-API say about them? What do other (i.e. MySQL 
interfaces) do?

Regards

Markus


[1]: Bug:
https://sourceforge.net/tracker/index.php?func=detail&aid=1409818&group_id=16528&atid=116528

[2]: Feature Request:
https://sourceforge.net/tracker/index.php?func=detail&aid=1503756&group_id=16528&atid=366528

[3]: Don't use transactions
https://sourceforge.net/tracker/index.php?func=detail&aid=1524586&group_id=16528&atid=116528

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