[Biopython-dev] [Bug 2849] PyGresql PostgreSQL driver support for BioSQL is broken

[bugzilla-daemon at portal.open-bio.org]

http://bugzilla.open-bio.org/show_bug.cgi?id=2849





------- Comment #5 from cymon.cox at gmail.com  2009-06-04 15:15 EST -------
(In reply to comment #3)
> (In reply to comment #2)
> > (In reply to comment #1)
> > > We don't really need the auto commit statement in the unit test, what
> > > happens on your machine if you remove it?
> > 
> > I think we do need it for psycopg/psycopg2, as the comment says, postgresql
> > cannot drop a database inside a transaction:
> > 
> > INTERNAL ERROR: DROP DATABASE cannot run inside a transaction block
> > 
> > C.
> 
> Did you try it anyway?
> 
> http://www.postgresql.org/docs/7.0/interactive/sql-dropdatabase.html
> http://www.postgresql.org/docs/8.3/interactive/sql-dropdatabase.html
> 
> This says "DROP DATABASE cannot be executed inside a transaction block.", which
> is fine - we don't want a transaction for this as we won't ever roll this back.

Psycopg defaults to a "read committed" isolation level that psycopg wraps in a
translation block. So, I think the only way not to be in a translation block is
to autocommit.

C.


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