Initial Fork from https://bitbucket.org/raphaelmutschler/calibreserver/

lib/sqlalchemy/dialects/informix/informixdb.py

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+# informix/informixdb.py
+# Copyright (C) 2005-2013 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:: informix+informixdb
+    :name: informixdb
+    :dbapi: informixdb
+    :connectstring: informix+informixdb://user:password@host/dbname
+    :url: http://informixdb.sourceforge.net/
+
+"""
+
+import re
+
+from sqlalchemy.dialects.informix.base import InformixDialect
+from sqlalchemy.engine import default
+
+VERSION_RE = re.compile(r'(\d+)\.(\d+)(.+\d+)')
+
+
+class InformixExecutionContext_informixdb(default.DefaultExecutionContext):
+
+    def post_exec(self):
+        if self.isinsert:
+            self._lastrowid = self.cursor.sqlerrd[1]
+
+    def get_lastrowid(self):
+        return self._lastrowid
+
+
+class InformixDialect_informixdb(InformixDialect):
+    driver = 'informixdb'
+    execution_ctx_cls = InformixExecutionContext_informixdb
+
+    @classmethod
+    def dbapi(cls):
+        return __import__('informixdb')
+
+    def create_connect_args(self, url):
+        if url.host:
+            dsn = '%s@%s' % (url.database, url.host)
+        else:
+            dsn = url.database
+
+        if url.username:
+            opt = {'user': url.username, 'password': url.password}
+        else:
+            opt = {}
+
+        return ([dsn], opt)
+
+    def _get_server_version_info(self, connection):
+        # http://informixdb.sourceforge.net/manual.html#inspecting-version-numbers
+        v = VERSION_RE.split(connection.connection.dbms_version)
+        return (int(v[1]), int(v[2]), v[3])
+
+    def is_disconnect(self, e, connection, cursor):
+        if isinstance(e, self.dbapi.OperationalError):
+            return 'closed the connection' in str(e) \
+                    or 'connection not open' in str(e)
+        else:
+            return False
+
+
+dialect = InformixDialect_informixdb