[更新]我想下面的索引定义并收到以下错误消息:Azure的SQL Server空间指数误差不能创建...因为列计算
Cannot create primary xml, selective xml or spatial index 'SI_Property' on table 'BTSOne.dbo.Properties', column 'Point', because the column is computed.
这是有道理的,但现在我回来了到一个方。
我试图这样做的原因是什么?由于查询超时。我为所有其他查询设置了索引,除了空间查询之外,它们是执行查询的主要类型。
我有点困惑在哪些列上创建空间索引。我担心,因为有些记录缺少影响点列(索引列)的经度和纬度值(默认为零)。起初我以为我可以在点栏上创建索引,但阅读关于此问题的文章表明我使用了多列。我读得越多,我就变得越迷惑。此外,还有正确设置网格的问题。经验法则似乎将它们设置为高。
这些都是相关的表列:
[Latitude] [float] NULL CONSTRAINT [DF_Properties_Latitude] DEFAULT ((0)),
[Longitude] [float] NULL CONSTRAINT [DF_Properties_Longitude] DEFAULT ((0)),
[Point] AS ([geography]::Point([Latitude],[Longitude],[SRID])),
[SRID] [int] NULL CONSTRAINT [DF_Properties_SRID] DEFAULT ((4326)),
这是存储过程的相关部分:
DECLARE @SearchPoint as geography,
@Region nvarchar(80)
SET @SearchPoint = geography::Point(@Latitude, @Longitude, 4326)
DECLARE @tempTable dbo.WorkingProperties
SELECT [PropertyId] AS "Id", ISNULL([InnCode],'NA') AS "InnCode", [UseName] AS "OfficeName", [Addr1] As "Address", [City]
, [Zip] AS "PostalCode", [CountryCode], [Brand], [BrandCode] ,[Latitude], [Longitude],
([Point].STDistance(@SearchPoint)/1000) AS "Distance",
NULL AS "ProjectType",'Properties' As "Source", [GlobalRMArea]
FROM [BTSOne].[dbo].[Properties]
WHERE [Point].STDistance(@SearchPoint) <= (@intRadiusKm * 1000)
AND OpenStatus = 'Open'
ORDER BY "Distance"
这是我会怎样创建索引:
CREATE SPATIAL INDEX [SI_Property] ON [BTSOne].[dbo].[Properties]
(
[Point]
)USING GEOGRAPHY_GRID
WITH (GRIDS =(LEVEL_1 = HIGH,LEVEL_2 = HIGH,LEVEL_3 = HIGH,LEVEL_4 = HIGH),
CELLS_PER_OBJECT = 16, PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, SORT_IN_TEMPDB = OFF, DROP_EXISTING = OFF, ONLINE = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON) ON [PRIMARY]
GO
我正在一个非常有限的访问环境中工作,所以我没有太多的尝试和错误的奢侈品nd我没有直接访问sql服务器实例,所以我不想忍受我的重试限制:-)。
谢谢!
谢谢@Jon_Bellamy! – 2015-04-06 20:45:47
Doh,这没有奏效。更新后的问题:-) – 2015-04-07 03:11:51
@WillLopez好的,但您的选择在这一点上非常明显。要么表现不佳,要么保留计算列,要么不计算,并享受空间索引的好处。你如何输入数据到表中?最好的解决方案是编辑插入来处理Point列的计算 - 而不是将其作为计算列。 – 2015-04-07 06:27:42