Name
ST_Reverse — Return the geometry with vertex order reversed.
Synopsis
geometry ST_Reverse(geometry g1);
説明
どのジオメトリでも使用可能です。頂点の順序を逆にします。
例
SELECT ST_AsText(the_geom) as line, ST_AsText(ST_Reverse(the_geom)) As reverseline
FROM
(SELECT ST_MakeLine(ST_MakePoint(1,2),
ST_MakePoint(1,10)) As the_geom) as foo;
-- 結果
line | reverseline
---------------------+----------------------
LINESTRING(1 2,1 10) | LINESTRING(1 10,1 2)