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Refuse connection with server with protocol version 2.

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This cuts off server whose version is older than 7.4. But enables us to
remove large portions of code rarely used and tested (e.g. p2 copy) and
will allow us to drop the query we do at each connection to establish
the client encoding and the datestyle.
This commit is contained in:
Daniele Varrazzo 2010-11-16 00:42:23 +00:00
parent 58079c6c91
commit 73265e7ece
4 changed files with 17 additions and 1 deletions
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4
ChangeLog
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@ -1,3 +1,7 @@
2010-11-16 Daniele Varrazzo <daniele.varrazzo@gmail.com>
* psycopg/connection_int.c: abort connection to protocol 2 server.
2010-11-11 Daniele Varrazzo <daniele.varrazzo@gmail.com>
* lib/extras.py: build the namedtuple only once per execution, not once

2
NEWS-2.3
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@ -13,6 +13,8 @@ psycopg 2.3 aims to expose some new features introduced in PostgreSQL 9.0.
* Other features and changes:
- Dropped support for protocol 2: Psycopg 2.3 can only connect to PostgreSQL
servers with version at least 7.4.
- `mogrify()` now supports unicode queries.
- subclasses of a type that can be adapted are adapted as the superclass.
- `errorcodes` knows a couple of new codes introduced in PostgreSQL 9.0.

4
doc/src/connection.rst
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@ -428,7 +428,9 @@ The ``connection`` class
.. attribute:: protocol_version
A read-only integer representing frontend/backend protocol being used.
It can be 2 or 3.
Currently Psycopg supports only protocol 3, which allows connection
to PostgreSQL server from version 7.4. Psycopg versions previous than
2.3 support both protocols 2 and 3.
.. seealso:: libpq docs for `PQprotocolVersion()`__ for details.

8
psycopg/connection_int.c
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@ -295,6 +295,10 @@ conn_setup(connectionObject *self, PGconn *pgconn)
self->equote = conn_get_standard_conforming_strings(pgconn);
self->server_version = conn_get_server_version(pgconn);
self->protocol = conn_get_protocol_version(self->pgconn);
if (3 != self->protocol) {
PyErr_SetString(InterfaceError, "only protocol 3 supported");
return -1;
}
Py_BEGIN_ALLOW_THREADS;
pthread_mutex_lock(&self->lock);
@ -636,6 +640,10 @@ _conn_poll_setup_async(connectionObject *self)
self->equote = conn_get_standard_conforming_strings(self->pgconn);
self->protocol = conn_get_protocol_version(self->pgconn);
self->server_version = conn_get_server_version(self->pgconn);
if (3 != self->protocol) {
PyErr_SetString(InterfaceError, "only protocol 3 supported");
break;
}
/* asynchronous connections always use isolation level 0, the user is
* expected to manage the transactions himself, by sending