Remove jython code, remove all jython / pypy symbols

Removed all dialect code related to support for Jython and zxJDBC. Jython
has not been supported by SQLAlchemy for many years and it is not expected
that the current zxJDBC code is at all functional; for the moment it just
takes up space and adds confusion by showing up in documentation. At the
moment, it appears that Jython has achieved Python 2.7 support in its
releases but not Python 3.   If Jython were to be supported again, the form
it should take is against the Python 3 version of Jython, and the various
zxJDBC stubs for various backends should be implemented as a third party
dialect.

Additionally modernized logic that distinguishes between "cpython"
and "pypy" to instead look at platform.python_distribution() which
reliably tells us if we are cPython or not; all booleans which
previously checked for pypy and sometimes jython are now converted
to be "not cpython", this impacts the test suite for tests that are
cPython centric.

Fixes: #5094
Change-Id: I226cb55827f997daf6b4f4a755c18e7f4eb8d9ad

3 files changed, 0 insertions, 52 deletions

diff --git a/lib/sqlalchemy/dialects/postgresql/__init__.py b/lib/sqlalchemy/dialects/postgresql/__init__.py
index 80875916a..06d22872a 100644
--- a/lib/sqlalchemy/dialects/postgresql/__init__.py
+++ b/lib/sqlalchemy/dialects/postgresql/__init__.py
@@ -11,7 +11,6 @@ from . import psycopg2  # noqa
 from . import psycopg2cffi  # noqa
 from . import pygresql  # noqa
 from . import pypostgresql  # noqa
-from . import zxjdbc  # noqa
 from .array import All
 from .array import Any
 from .array import ARRAY
diff --git a/lib/sqlalchemy/dialects/postgresql/base.py b/lib/sqlalchemy/dialects/postgresql/base.py
index 0f08d1f40..cbc750066 100644
--- a/lib/sqlalchemy/dialects/postgresql/base.py
+++ b/lib/sqlalchemy/dialects/postgresql/base.py
@@ -1156,9 +1156,6 @@ class INTERVAL(sqltypes.NativeForEmulated, sqltypes._AbstractInterval):
 
     """PostgreSQL INTERVAL type.
 
-    The INTERVAL type may not be supported on all DBAPIs.
-    It is known to work on psycopg2 and not pg8000 or zxjdbc.
-
     """
 
     __visit_name__ = "INTERVAL"
diff --git a/lib/sqlalchemy/dialects/postgresql/zxjdbc.py b/lib/sqlalchemy/dialects/postgresql/zxjdbc.py
deleted file mode 100644
index 6ca7fcf98..000000000
--- a/lib/sqlalchemy/dialects/postgresql/zxjdbc.py
+++ /dev/null
@@ -1,48 +0,0 @@
-# postgresql/zxjdbc.py
-# Copyright (C) 2005-2020 the SQLAlchemy authors and contributors
-# <see AUTHORS file>
-#
-# This module is part of SQLAlchemy and is released under
-# the MIT License: http://www.opensource.org/licenses/mit-license.php
-
-"""
-.. dialect:: postgresql+zxjdbc
-    :name: zxJDBC for Jython
-    :dbapi: zxjdbc
-    :connectstring: postgresql+zxjdbc://scott:tiger@localhost/db
-    :driverurl: http://jdbc.postgresql.org/
-
-
-"""
-from .base import PGDialect
-from .base import PGExecutionContext
-from ...connectors.zxJDBC import ZxJDBCConnector
-
-
-class PGExecutionContext_zxjdbc(PGExecutionContext):
-    def create_cursor(self):
-        cursor = self._dbapi_connection.cursor()
-        cursor.datahandler = self.dialect.DataHandler(cursor.datahandler)
-        return cursor
-
-
-class PGDialect_zxjdbc(ZxJDBCConnector, PGDialect):
-    jdbc_db_name = "postgresql"
-    jdbc_driver_name = "org.postgresql.Driver"
-
-    execution_ctx_cls = PGExecutionContext_zxjdbc
-
-    supports_native_decimal = True
-
-    def __init__(self, *args, **kwargs):
-        super(PGDialect_zxjdbc, self).__init__(*args, **kwargs)
-        from com.ziclix.python.sql.handler import PostgresqlDataHandler
-
-        self.DataHandler = PostgresqlDataHandler
-
-    def _get_server_version_info(self, connection):
-        parts = connection.connection.dbversion.split(".")
-        return tuple(int(x) for x in parts)
-
-
-dialect = PGDialect_zxjdbc