创建过滤索引时出现语法错误

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]

很遗憾，我收到以下错误消息：

消息 156，第 15 级，状态 1，第 16 行
关键字“或”附近的语法不正确。

这对我来说有点奇怪。我已经查阅了相关的 MSDN 页面，我没有看到任何适合这里的约束。过滤器中的两列都存在于索引中。创建索引时，表达式中没有 OR。我在这里错过了什么？

Answer 1

过滤索引只允许AND 和IN 谓词，因此您的问题在于您的WHERE 子句——您不能使用OR。你可以通过创建两个索引来解决这个问题：

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]