Make MySQL regexes generic across MySQL drivers

Note that mysqlconnector raises InternalError whereas mysqldb raises
OperationalError when a deadlock is found.  The reported error codes and
messages are identical, however.

Change-Id: Iac9167e0777e0bf4361bcf6a8722923cce052b90

oslo/db/sqlalchemy/exc_filters.py

@@ -57,7 +57,8 @@ def filters(dbname, exception_type, regex):
 # psycopg2.extensions.TransactionRollbackError(OperationalError),
 # as well as sqlalchemy.exc.DBAPIError, as SQLAlchemy will reraise it
 # as this until issue #3075 is fixed.
-@filters("mysql", sqla_exc.OperationalError, r"^.*\(1213, 'Deadlock.*")
+@filters("mysql", sqla_exc.OperationalError, r"^.*\b1213\b.*Deadlock found.*")
+@filters("mysql", sqla_exc.InternalError, r"^.*\b1213\b.*Deadlock found.*")
 @filters("postgresql", sqla_exc.OperationalError, r"^.*deadlock detected.*")
 @filters("postgresql", sqla_exc.DBAPIError, r"^.*deadlock detected.*")
 @filters("ibm_db_sa", sqla_exc.DBAPIError, r"^.*SQL0911N.*")
@@ -67,10 +68,14 @@ def _deadlock_error(operational_error, match, engine_name, is_disconnect):
     NOTE(comstud): In current versions of DB backends, Deadlock violation
     messages follow the structure:
 
-    mysql:
+    mysql+mysqldb:
     (OperationalError) (1213, 'Deadlock found when trying to get lock; try '
                          'restarting transaction') <query_str> <query_args>
 
+    mysql+mysqlconnector:
+    (InternalError) 1213 (40001): Deadlock found when trying to get lock; try
+                         restarting transaction
+
     postgresql:
     (TransactionRollbackError) deadlock detected <deadlock_details>
 
@@ -174,7 +179,7 @@ def _db2_dupe_key_error(integrity_error, match, engine_name, is_disconnect):
     raise exception.DBDuplicateEntry([], integrity_error)
 
 
-@filters("mysql", sqla_exc.DBAPIError, r".*\(1146")
+@filters("mysql", sqla_exc.DBAPIError, r".*\b1146\b")
 def _raise_mysql_table_doesnt_exist_asis(
         error, match, engine_name, is_disconnect):
     """Raise MySQL error 1146 as is, so that it does not conflict with

tests/sqlalchemy/test_exc_filters.py

@@ -41,6 +41,9 @@ class TestsExceptionFilter(test_base.DbTestCase):
     class InterfaceError(Error):
         pass
 
+    class InternalError(Error):
+        pass
+
     class IntegrityError(Error):
         pass
 
@@ -287,7 +290,7 @@ class TestDeadlock(TestsExceptionFilter):
             str(matched)
         )
 
-    def test_mysql_deadlock(self):
+    def test_mysql_mysqldb_deadlock(self):
         self._run_deadlock_detect_test(
             "mysql",
             "(1213, 'Deadlock found when trying "
@@ -295,6 +298,14 @@ class TestDeadlock(TestsExceptionFilter):
             "transaction')"
         )
 
+    def test_mysql_mysqlconnector_deadlock(self):
+        self._run_deadlock_detect_test(
+            "mysql",
+            "1213 (40001): Deadlock found when trying to get lock; try "
+            "restarting transaction",
+            orig_exception_cls=self.InternalError
+        )
+
     def test_mysql_not_deadlock(self):
         self._not_deadlock_test(
             "mysql",