old_contents: from django.db.utils import ProgrammingError
  from django.core.management.base import BaseCommand
  
  
  class Command(BaseCommand):  # pragma: no cover
      """We USED to have djcelery installed but it was an ancient version.
      And we never used it. Because those tables lingering, we can't execute
      `./manage.py syncdb` and `./manage.py migrate`
  
      There's no harm in deleting these tables because the worst thing
      that can happen is that we lose some pending jobs.
      However, at the time of writing we don't have a message queue working.
      """
      def handle(self, *args, **options):
          from django.db import connection
          cursor = connection.cursor()
          try:
              cursor.execute("""
              DROP TABLE  djcelery_taskstate;
              DROP TABLE  djcelery_workerstate;
              DROP TABLE  djcelery_periodictasks;
              DROP TABLE  djcelery_periodictask;
              DROP TABLE  djcelery_intervalschedule;
              DROP TABLE  djcelery_crontabschedule;
  
              DELETE FROM south_migrationhistory WHERE app_name = 'djcelery';
              DELETE FROM south_migrationhistory WHERE app_name = 'django';
              """)
              connection.commit()
          except ProgrammingError as exception:
              print "Unable delete old celery tabes"
              print exception
  
new_contents: from django.db.utils import ProgrammingError
  from django.core.management.base import BaseCommand
  
  
  class Command(BaseCommand):  # pragma: no cover
      """We USED to have djcelery installed but it was an ancient version.
      And we never used it. Because those tables lingering, we can't execute
      `./manage.py syncdb` and `./manage.py migrate`
  
      There's no harm in deleting these tables because the worst thing
      that can happen is that we lose some pending jobs.
      However, at the time of writing we don't have a message queue working.
      """
      def handle(self, *args, **options):
          from django.db import connection
          cursor = connection.cursor()
          try:
              cursor.execute("""
              DROP TABLE  celery_taskmeta;
              DROP TABLE  celery_tasksetmeta;
              DROP TABLE  djcelery_taskstate;
              DROP TABLE  djcelery_workerstate;
              DROP TABLE  djcelery_periodictasks;
              DROP TABLE  djcelery_periodictask;
              DROP TABLE  djcelery_intervalschedule;
              DROP TABLE  djcelery_crontabschedule;
  
              DELETE FROM south_migrationhistory WHERE app_name = 'djcelery';
              """)
              connection.commit()
          except ProgrammingError as exception:
              print "Unable delete old celery tabes"
              print exception
  
          cursor = connection.cursor()
          try:
              cursor.execute("""
              DROP TABLE  djkombu_message;
              DROP TABLE  djkombu_queue;
  
              DELETE FROM south_migrationhistory WHERE app_name = 'django';
              """)
              connection.commit()
          except ProgrammingError as exception:
              print "Unable delete old djkombu tabes"
              print exception
  
subject: delete all local djcelery tables