Fixed #22321 -- Wrapped exceptions in _set_autocommit.

Refs #21202.

django/db/backends/mysql/base.py

@@ -488,6 +488,7 @@ class DatabaseWrapper(BaseDatabaseWrapper):
             pass
 
     def _set_autocommit(self, autocommit):
+        with self.wrap_database_errors:
             self.connection.autocommit(autocommit)
 
     def disable_constraint_checking(self):

django/db/backends/oracle/base.py

@@ -687,6 +687,7 @@ class DatabaseWrapper(BaseDatabaseWrapper):
         pass
 
     def _set_autocommit(self, autocommit):
+        with self.wrap_database_errors:
             self.connection.autocommit = autocommit
 
     def check_constraints(self, table_names=None):

django/db/backends/postgresql_psycopg2/base.py

@@ -189,6 +189,7 @@ class DatabaseWrapper(BaseDatabaseWrapper):
             self.connection.set_isolation_level(isolation_level)
 
     def _set_autocommit(self, autocommit):
+        with self.wrap_database_errors:
             if self.psycopg2_version >= (2, 4, 2):
                 self.connection.autocommit = autocommit
             else:

django/db/backends/sqlite3/base.py

@@ -411,6 +411,7 @@ class DatabaseWrapper(BaseDatabaseWrapper):
             level = ''
         # 'isolation_level' is a misleading API.
         # SQLite always runs at the SERIALIZABLE isolation level.
+        with self.wrap_database_errors:
             self.connection.isolation_level = level
 
     def check_constraints(self, table_names=None):