Question

我正在尝试添加此索引：

CREATE NONCLUSTERED INDEX [HE_MissingIndex] 
ON [dbo].[HardwareEvents] ([PlaceId] ASC, [EventId] ASC, [UserTokenType])
INCLUDE ([Id], [EventTime], [UserToken], [Username], [UserId],
         [VisitorId], [UserLastname]) 
WHERE (EventId = 16 AND UserTokenType = 5) OR EventId = 58
          WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, 
                SORT_IN_TEMPDB = OFF, DROP_EXISTING = ON, ONLINE = OFF, 
                ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON) ON [PRIMARY]

不幸的是，我收到此错误消息：

第156条消息，第15级，状态1，第16行
关键字“或”附近的语法不正确。

对我来说有点奇怪。我已经查阅了相关的MSDN页面，我没有看到适合这里的任何约束。过滤器中的两列都存在于索引中。创建的索引在表达式中没有OR。我在这里想念什么？

Answer 1

过滤索引仅允许AND和IN谓词，因此您的问题出在WHERE子句中，不能使用OR。您可以通过创建两个索引来解决此问题：

CREATE NONCLUSTERED INDEX [HE_MissingIndex] ON [dbo].[HardwareEvents]
(
    [PlaceId] ASC,
    [EventId] ASC,
    [UserTokenType] ASC
)
INCLUDE (   [Id],
    [EventTime],
    [UserToken],
    [Username],
    [UserId],
    [VisitorId],
    [UserLastname]) 
    WHERE [EventId] = 16 and [UserTokenType] = 5
WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, SORT_IN_TEMPDB = OFF, DROP_EXISTING = ON, ONLINE = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON) ON [PRIMARY]


CREATE NONCLUSTERED INDEX [HE_MissingIndex_2] ON [dbo].[HardwareEvents]
(
    [PlaceId] ASC,
    [EventId] ASC,
    [UserTokenType] ASC
)
INCLUDE (   [Id],
    [EventTime],
    [UserToken],
    [Username],
    [UserId],
    [VisitorId],
    [UserLastname]) 
    WHERE [EventId] = 58
WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, SORT_IN_TEMPDB = OFF, DROP_EXISTING = ON, ONLINE = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON) ON [PRIMARY]

获取过滤索引创建时出现语法错误

1 个答案: