SELECT "snore_notification"."id", "snore_notification"."acknowledged",
"snore_notification"."active", "snore_notification"."classname",
"snore_notification"."elementclass", "snore_notification"."elementname",
"snore_notification"."event", "snore_notification"."eventtext",
"snore_notification"."firstnotified", "snore_notification"."lastnotified",
"snore_notification"."lastcleared", "snore_notification"."lastchanged",
"snore_notification"."inserttime", "snore_notification"."instance",
"snore_notification"."impact", "snore_notification"."isroot",
"snore_notification"."isproblem", "snore_notification"."name",
"snore_notification"."notificationtype", "snore_notification"."owner",
"snore_notification"."severity", "snore_notification"."sourcedomain",
"snore_notification"."troubleticketid", "snore_notification"."userdefined1",
"snore_notification"."userdefined2", "snore_notification"."userdefined3",
"snore_notification"."userdefined4", "snore_notification"."userdefined5",
"snore_notification"."userdefined6", "snore_notification"."userdefined7",
"snore_notification"."userdefined8", "snore_notification"."userdefined9",
"snore_notification"."userdefined10", "snore_notification"."instancedisplayname",
"snore_notification"."counts" FROM "snore_notification" WHERE
("snore_notification"."firstnotified" BETWEEN 2011-01-03 00:00:00 and 2011-01-03
23:59:59 AND ("snore_notification"."instance"::text LIKE %OPEN% OR
"snore_notification"."elementname" = OPEN OR
"snore_notification"."troubleticketid"::text LIKE %OPEN% OR
"snore_notification"."userdefined2" = OPEN ))';
生成此查询的代码是
Notification.objects.filter(Q(firstnotified__range=(beginstring, endstring)),Q(instance__contains=i)|Q(elementname=i)|Q(troubleticketid__contains=i)|Q(userdefined2=i))
我正在连接到不喜欢:: text cast的Vertica数据库。有没有办法禁用它？
答案 0 :(得分：1)
如果您实现扩展PostgreSQL后端的数据库后端，则可以更改它。
::text类中的lookup_cast方法中对DatabaseOperations进行了硬编码。
来源：http://code.djangoproject.com/browser/django/trunk/django/db/backends/postgresql/operations.py#L60