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Diffstat (limited to 'doc/src/connection.rst')
| -rw-r--r-- | doc/src/connection.rst | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/doc/src/connection.rst b/doc/src/connection.rst index 624fcba..22241fe 100644 --- a/doc/src/connection.rst +++ b/doc/src/connection.rst @@ -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. |