SQL Server 行构造函数或 ST_MakeLine(pt1,pt2) 版本？

Question

PostGIS 提供了一个名为ST_MakeLine(pt1,pt2). 它非常适合构建线条。MySQL 对LineString(pt1,pt2). 什么叫 SQL Server 模拟，它需要两个点并构造一个 LineString？

我查了一下LineString，但没有看到提到它。

这是一个关于 dbfiddle 的测试用例。

样本数据，

CREATE TABLE #tmp (
  pt1 geometry,
  pt2 geometry,
);

INSERT INTO #tmp(pt1,pt2) VALUES
  (geometry::Point(1,1,4326), geometry::Point(2,2,4326)),
  (geometry::Point(2,2,4326), geometry::Point(5,5,4326)),
  (geometry::Point(3,3,4326), geometry::Point(4,4,4326)),
  (geometry::Point(4,4,4326), geometry::Point(3,3,4326)),
  (geometry::Point(5,5,4326), geometry::Point(4,4,4326));

询问

SELECT pt1, pt2
  'My Line' AS line -- what goes here
FROM #tmp;

我希望“My Line”成为LineString.

pt1         pt2         line
POINT (1 1) POINT (2 2) My Line
POINT (2 2) POINT (5 5) My Line
POINT (3 3) POINT (4 4) My Line
POINT (4 4) POINT (3 3) My Line
POINT (5 5) POINT (4 4) My Line

Answer 1

尝试ShortestLineTo()：

SELECT
  pt1.ToString(),
  pt2.ToString(),
  pt1.ShortestLineTo(pt2).ToString() AS line -- what goes here
FROM #tmp;

退货

POINT (1 1)   POINT (2 2)   LINESTRING (1 1, 2 2)
POINT (2 2)   POINT (5 5)   LINESTRING (2 2, 5 5)
POINT (3 3)   POINT (4 4)   LINESTRING (3 3, 4 4)
POINT (4 4)   POINT (3 3)   LINESTRING (4 4, 3 3)
POINT (5 5)   POINT (4 4)   LINESTRING (5 5, 4 4)