切换数据分区时出现"无相同索引"错误

Question

我正在尝试设置一个数据仓库应用程序,以便我的公司使用分区数据导入表.我试图删除旧数据并为新数据腾出空间.这是我收到此错误消息的地方:

Msg 4947, Level 16, State 1, Line 1 ALTER TABLE SWITCH statement failed. There is no identical index in source table 'AssetServer.dbo.IISLog061122' for the index 'IDX_IISLogPartitioned_IP' in target table 'AssetServer.dbo.IISLogPartitioned' . 

以下是它需要复制的索引的定义

/******对象:索引[IDX_IISLogPartitioned_IP]脚本日期:07/01/2009 10:44:45******/

CREATE NONCLUSTERED INDEX [IDX_IISLogPartitioned_IP] ON [dbo].[IISLogPartitioned] ( 
[c-ip] ASC 
)WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, SORT_IN_TEMPDB = OFF, IGNORE_DUP_KEY = OFF, DROP_EXISTING = OFF, ONLINE = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON) 

在下面你会看到我在存储过程中创建了一个相同的索引.我已经验证它已成功创建,但alter table语句失败并显示上述消息.存储过程的主循环归结为:

ALTER PARTITION FUNCTION fnIISLogRequestTime() SPLIT RANGE ('20090612 01:59:59:000');

CREATE TABLE [dbo].[IISLog061201]     
    ([RequestTime] [datetime] NULL,     
     [weekday] [int] NOT NULL,     
     [cs-method] [varchar](50) NOT NULL,     
     [cs-uri-stem] [varchar](255) NOT NULL,     
     [cs-uri-query] [varchar](2048) NULL,     
     [c-ip] [varchar](50) NOT NULL,     
     [cs(Referer)] [varchar](2048) NULL,     
     [cs-host] [varchar](255) NULL,     
     [sc-status] [int] NOT NULL,     
     [sc-substatus] [int] NULL,     
     [sc-bytes] [int] NULL,     
     [cs-bytes] [int] NULL,     
     [time-taken] [int] NULL,     
     [insertiontime] [datetime] NOT NULL,     
     [TimeSinceLast] [int] NULL,     
     [VIP] [varchar](50) NULL) ON [PRIMARY];      



CREATE NONCLUSTERED INDEX [IDX_IISLogPartitioned_IP] ON [dbo].[IISLog061201](
    [c-ip] ASC
) WITH (
    PAD_INDEX  = OFF, STATISTICS_NORECOMPUTE  = OFF, 
    SORT_IN_TEMPDB = OFF, IGNORE_DUP_KEY = OFF, 
    DROP_EXISTING = OFF, ONLINE = OFF, 
    ALLOW_ROW_LOCKS  = ON, ALLOW_PAGE_LOCKS  = ON);


ALTER TABLE [dbo].[IISLog061201] SWITCH TO IISLogPartitioned PARTITION 7

如何摆脱此错误消息？

Answer 1

您收到错误的原因是因为这两个索引实际上并不相同.分区表上的索引在其定义中包含分区列,即使您的代码没有明确说明它.(这是一个幕后的事情.)

如果要在分区表时进行分区切换,则索引需要显式引用分区列.更改您提供的索引包括RequestTime(假设这是分区列).您可以将其作为索引列或仅包含列.下面我去包括.

CREATE NONCLUSTERED INDEX [IDX_IISLogPartitioned_IP] ON [dbo].[IISLog061201](
[c-ip] ASC) INCLUDE ( RequestTime ) WITH (
PAD_INDEX  = OFF, STATISTICS_NORECOMPUTE  = OFF, 
SORT_IN_TEMPDB = OFF, IGNORE_DUP_KEY = OFF, 
DROP_EXISTING = OFF, ONLINE = OFF, 
ALLOW_ROW_LOCKS  = ON, ALLOW_PAGE_LOCKS  = ON);

现在它应该工作.