3

我有一个包含数据类型列Shape的表geometry。

这是中的数据Shape：

POLYGON ((565542.98375 2127263.4997410, 565538.48450 2127261.3187302, 565541.96658 2127254.1162, 565546.465835 2127256.297297, 565542.9837 2127263.49974102))
POLYGON ((565547.281621307 2127097.9410014, 565549.457915 2127093.43948425, 565553.577449391 2127084.9189882, 565568.882475 2127092.31709055, 565562.586805441 2127105.3404182, 565547.2816807 2127097.94105044))

等等....

我需要输出为

ID | X               | Y 
---+-----------------+-----------------
1  | 565542.98375    | 2127263.4997410
1  | 565538.48450    | 2127261.3187302 
1  | 565541.96658    | 2127254.1162 
1  | 565546.465835   | 2127256.297297 
1  | 565542.9837     | 2127263.49974102 
2  | 565547.281627   | 2127097.9410014 
2  | 565549.457915   | 2127093.43948425 
2  | 565553.5774391  | 2127084.9189882

等等表格格式

4

4 回答 4

3

如果您首先创建一个 Numbers 表，其中包含从上到下的连续整数，1并且行数至少与您将要处理的最大点数一样多，那么这很简单。

SELECT S.id,
       X = S.GeomCol1.STPointN(N.number).STX,
       Y = S.GeomCol1.STPointN(N.number).STY
FROM   SpatialTable S
JOIN   Numbers N
ON     N.number <= S.GeomCol1.STNumPoints()

下面是创建和填充 Numbers 表的代码。

CREATE TABLE dbo.Numbers(Number INT PRIMARY KEY);

WITH E1(N) AS 
(
    SELECT 1 UNION ALL SELECT 1 UNION ALL SELECT 1 UNION ALL 
    SELECT 1 UNION ALL SELECT 1 UNION ALL SELECT 1 UNION ALL 
    SELECT 1 UNION ALL SELECT 1 UNION ALL SELECT 1 UNION ALL SELECT 1
)                                       -- 1*10^1 or 10 rows
, E2(N) AS (SELECT 1 FROM E1 a, E1 b)   -- 1*10^2 or 100 rows
, E4(N) AS (SELECT 1 FROM E2 a, E2 b)   -- 1*10^4 or 10,000 rows
, E8(N) AS (SELECT 1 FROM E4 a, E4 b)   -- 1*10^8 or 100,000,000 rows
, Nums AS (SELECT TOP (10000000) ROW_NUMBER() OVER (ORDER BY (SELECT NULL)) AS N FROM E8)
INSERT INTO dbo.Numbers
SELECT N
FROM Nums
于 2018-12-29T14:47:00.720 回答
2

这是一个适用于 2012 的选项。请注意，我们维护序列 ( RetSeq)

例子

SELECT A.ID
      ,B.RetSeq
      ,X = left(C.RetVal,charindex(' ',C.RetVal)-1)
      ,Y = substring(C.RetVal,charindex(' ',C.RetVal)+1,50)
 FROM  YourTable A
 Cross Apply (
        Select RetSeq = row_number() over (Order By 1/0)
              ,RetVal = B2.i.value('(./text())[1]', 'varchar(100)')
        From  (Select x = Cast('<x>' + replace(A.Shape.STAsText(),',','</x><x>')+'</x>' as xml)) as B1
        Cross Apply x.nodes('x') AS B2(i)
       ) B
  Cross Apply ( values (ltrim(rtrim(replace(replace(replace(B.RetVal,'POLYGON',''),'(',''),')','')))) ) C(RetVal)

退货

ID  RetSeq  X                   Y
1   1       565542.98375        2127263.499741
1   2       565538.4845         2127261.3187302
1   3       565541.96658        2127254.1162
1   4       565546.465835       2127256.297297
1   5       565542.98375        2127263.499741
2   1       565547.281621307    2127097.9410014
2   2       565549.457915       2127093.43948425
2   3       565553.577449391    2127084.9189882
2   4       565568.882475       2127092.31709055
2   5       565562.586805441    2127105.3404182
2   6       565547.281621307    2127097.9410014

编辑

Martin Smith 的解决方案确实应该是ACCEPTED的答案。如果您无法创建数字表，则可以使用临时计数表。

例子

Select A.ID 
      ,Seq = B.N
      ,X   = Shape.STPointN(N).STX
      ,Y   = Shape.STPointN(N).STY
 From  YourTable A
 Cross Apply (Select Top (Shape.STNumPoints()) N=Row_Number() Over (Order By 1/0) From master..spt_values n1, master..spt_values n2 ) B

要求编辑

;with cte as (
SELECT A.ID
      ,B.RetSeq
      ,X = left(C.RetVal,charindex(' ',C.RetVal)-1)
      ,Y = substring(C.RetVal,charindex(' ',C.RetVal)+1,50)
      ,Cnt = max(B.RetSeq) over (Partition by A.ID)
 FROM  YourTable A
 Cross Apply (
        Select RetSeq = row_number() over (Order By 1/0)
              ,RetVal = B2.i.value('(./text())[1]', 'varchar(100)')
        From  (Select x = Cast('<x>' + replace(A.Shape.STAsText(),',','</x><x>')+'</x>' as xml)) as B1
        Cross Apply x.nodes('x') AS B2(i)
       ) B
  Cross Apply ( values (ltrim(rtrim(replace(replace(replace(B.RetVal,'POLYGON',''),'(',''),')','')))) ) C(RetVal) 
) 
Select *
 From  cte
 Where RetSeq<Cnt
 Order By ID,RetSeq

或 ... 注意 TOP 中的负 1

Select A.ID 
      ,Seq = B.N
      ,X   = Shape.STPointN(N).STX
      ,Y   = Shape.STPointN(N).STY
 From  YourTable A
 Cross Apply (Select Top (Shape.STNumPoints() - 1) N=Row_Number() Over (Order By 1/0) From master..spt_values n1, master..spt_values n2 ) B
于 2018-12-29T14:19:54.637 回答
1

解析字符串的幼稚方法（SQL Server 2017）：

CREATE TABLE SpatialTable   
    ( id int IDENTITY (1,1),  
    GeomCol1 geometry );

INSERT INTO SpatialTable
SELECT geometry::STGeomFromText(
'POLYGON ((565542.98375 2127263.4997410, 565538.48450 2127261.3187302, 565541.96658 2127254.1162, 565546.465835 2127256.297297, 565542.98375 2127263.4997410))',0)
UNION ALL
SELECT geometry::STGeomFromText('POLYGON ((565547.281621307 2127097.9410014, 565549.457915 2127093.43948425, 565553.577449391 2127084.9189882, 565568.882475 2127092.31709055, 565562.586805441 2127105.3404182, 565547.281621307 2127097.9410014))',0);

询问：

SELECT ID, s1.rn, s3.x, s3.y, GeomCol1
FROM SpatialTable s
CROSS APPLY (SELECT value, ROW_NUMBER() OVER(ORDER BY 1/0) AS rn 
             FROM STRING_SPLIT(s.GeomCol1.STAsText() ,','))  s1
CROSS APPLY (SELECT TRIM(TRANSLATE(value, 'POLYGON()', '         '))) s2(r)
CROSS APPLY (SELECT TRY_CAST(LEFT(s2.r, CHARINDEX(' ',s2.r)) AS DECIMAL(18,6)),
             TRY_CAST(RIGHT(s2.r,LEN(s2.r)-CHARINDEX(' ',s2.r)) AS DECIMAL(18,6))
            ) s3(x,y);

db<>小提琴演示

于 2018-12-29T13:35:39.180 回答
1

您可以使用 CROSS APPLY 中的几何方法来获取这些值。
然后从点中获取 X 和 Y。

在下面的示例中，数字来自 spt_values，但这只是获取包含范围内数字的 Tally 表的方法之一。 

WITH NUMS AS 
(
  SELECT DISTINCT number as n 
  FROM master..[spt_values]
  WHERE number between 1 and 128 
)
SELECT ID, GeoPoint.STX AS X, GeoPoint.STY AS Y
FROM Shapes s
CROSS APPLY 
( 
  SELECT n as PointN, Shape.STPointN(n) AS GeoPoint
  FROM NUMS 
  WHERE n BETWEEN 1 AND Shape.STNumPoints()
) ca;

在这里测试db<>fiddle

于 2018-12-29T14:48:40.327 回答