from django.db import migrations class Migration(migrations.Migration): dependencies = [ ('zerver', '0094_realm_filter_url_validator'), ] operations = [ migrations.RunSQL( ''' CREATE INDEX IF NOT EXISTS zerver_usermessage_unread_message_id ON zerver_usermessage (user_profile_id, message_id) WHERE (flags & 1) = 0; ''', reverse_sql='DROP INDEX zerver_usermessage_unread_message_id;' ), ]