7
我運行以下:由於此查詢中定義的提示,查詢處理器無法生成查詢計劃。請重新提交查詢,並且不使用SET FORCEPLAN
DECLARE @g geography;
declare @point nvarchar(50) =''
declare @i int =0,
@lat decimal(8,6) =0.0,
@long decimal(8,6) =0.0,
@start datetime = getdate()
set @lat =(select (0.9 -Rand()*1.8)*100)
set @long =(select (0.9 -Rand()*1.8)*100)
set @point = (select 'POINT('+CONVERT(varchar(10), @lat)+ ' '
+CONVERT(varchar(10), @long)+')')
SET @g = geography::STGeomFromText(@point, 4326);
SELECT TOP 1000
@lat,
@long,
@g.STDistance(st.[coord]) AS [DistanceFromPoint (in meters)]
, st.[coord]
, st.id
FROM Temp st with(index([SpatialIndex_1]))
這個查詢,因爲它不使用空間指數表現不佳,所以我加了with(index([SpatialIndex_1]))
給力了。
地理指標看起來如下:
CREATE SPATIAL INDEX [SpatialIndex_1] ON [dbo].Temp
(
[coord]
)USING GEOGRAPHY_GRID
WITH (GRIDS =(LEVEL_1 = LOW,LEVEL_2 = MEDIUM,LEVEL_3 = LOW,LEVEL_4 = LOW),
CELLS_PER_OBJECT = 16, PAD_INDEX = OFF,
STATISTICS_NORECOMPUTE = OFF, SORT_IN_TEMPDB = OFF, DROP_EXISTING = OFF,
ONLINE = OFF, ALLOW_ROW_LOCKS = OFF, ALLOW_PAGE_LOCKS = ON, FILLFACTOR = 95)
ON [PRIMARY]
現在,它給我的錯誤信息
消息8622,級別16,狀態1,第15行,查詢處理器未能 產生,因爲查詢計劃在此查詢中定義的提示。 重新提交查詢,但沒有指定任何提示,也沒有使用SET FORCEPLAN。
我可以閱讀和理解,它告訴我刪除提示,問題是爲什麼它在編譯成功,但在運行時失敗?我的索引有問題嗎?
我需要更改SQL以開始使用空間索引?
生成一些數據,你可以使用下面的腳本。
CREATE TABLE dbo.Temp
(
Id int NOT NULL IDENTITY (1, 1),
Coord geography NOT NULL
) ON [PRIMARY]
TEXTIMAGE_ON [PRIMARY]
GO
ALTER TABLE dbo.Temp ADD CONSTRAINT
PK_Temp PRIMARY KEY CLUSTERED
(
Id
)
WITH(STATISTICS_NORECOMPUTE = OFF, IGNORE_DUP_KEY = OFF,
ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON)
ON [PRIMARY]
GO
declare @i int =0
declare @lat decimal(8,6) =0.0
declare @long decimal(8,6) =0.0
while (@i < 47000)
begin
set @lat =(select (0.9 -Rand()*1.8)*100)
set @long =(select (0.9 -Rand()*1.8)*100)
insert into Temp
select geography::Point(@lat, @long,4326)
set @i [email protected]+1
end
go
CREATE SPATIAL INDEX [SpatialIndex_1] ON [dbo].Temp
(
[coord]
)USING GEOGRAPHY_GRID
WITH (GRIDS =(LEVEL_1 = LOW,LEVEL_2 = MEDIUM,LEVEL_3 = LOW,LEVEL_4 = LOW),
CELLS_PER_OBJECT = 16, PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF,
SORT_IN_TEMPDB = OFF, DROP_EXISTING = OFF, ONLINE = OFF,
ALLOW_ROW_LOCKS = OFF, ALLOW_PAGE_LOCKS = ON, FILLFACTOR = 95)
ON [PRIMARY]
GO
我正在訂購(只想要最近的TOP x),但沒有在那裏有STDistance()的where子句;爲我清理它。謝啦。 – radpin