POLL_OK has been changed from 3 to 0 to let the user specify a short loop
just as "if not curs.poll()" instead of having to check for write and read
separately. For an example of this, see examples/notify.py.
Drop the async kwarg from cursor.execute(), cursors created by
asynchronous connections will be asynchronous by default, ones created
by synchronous connections will be synchronous.
Mind that this might break third party subclasses of
psycopg2.extensions.cursor, if they try to chain to the superclass in
their execute() implementation and are passing the async kwarg. The
example cursors in psycopg2.extras have been fixed no to do that.
After calling psycopg2.connect(dsn, async=True) you can poll the
connection that will tell you whether its file descriptor should be
waited on to become writable or readable or that the connection
attempt has succeeded.
Edited commit by Jan to not expose internal state in extensions.py.
You hereby have my blessing to go ahead and license all my contributions to
the psycopg2 project, including lib/errorcodes.py to LGPL3(+).
-- Johan Dahlin
over some tests for serialisation and deadlock errors,
demonstrating that TransactionRollbackError is generated.
(QueryCancelationTests): add a test to show that
QueryCanceledError is raised on statement timeouts.
* psycopg2da/adapter.py (_handle_psycopg_exception): rather than
checking exception messages, check for TransactionRollbackError.
* psycopg/pqpath.c (exception_from_sqlstate): return
TransactionRollbackError for 40xxx errors, and QueryCanceledError
for 57014 errors.
(pq_raise): If we are using an old server, use
TransactionRollbackError if the error message contains "could not
serialize" or "deadlock detected".
* psycopg/psycopgmodule.c (_psyco_connect_fill_exc): remove
function, since we no longer need to store pointers to the
exceptions in the connection. This also fixes a reference leak.
(psyco_connect): remove _psyco_connect_fill_exc() function call.
* psycopg/connection.h (connectionObject): remove exception
members from struct.
* psycopg/connection_type.c (connectionObject_getsets): modify the
exception attributes on the connection object from members to
getsets. This reduces the size of the struct.
* lib/extensions.py: import the two new extensions.
* psycopg/psycopgmodule.c (exctable): add new QueryCanceledError
and TransactionRollbackError exceptions.
