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ST_GEOMETRYFROMWKB,ST_GEOMFROMWKB

描述

将一个标准图形 WKB(Well-known binary)转化为对应的内存的几何形式

语法

ST_GeometryFromWKB( <wkb>)

参数

参数说明
<wkb>图形的内存形式

返回值

WKB 的对应的几何存储形式

举例

select ST_AsText(ST_GeometryFromWKB(ST_AsBinary(ST_Point(24.7, 56.7))));
+------------------------------------------------------------------+
| st_astext(st_geometryfromwkb(st_asbinary(st_point(24.7, 56.7)))) |
+------------------------------------------------------------------+
| POINT (24.7 56.7) |
+------------------------------------------------------------------+
select ST_AsText(ST_GeomFromWKB(ST_AsBinary(ST_Point(24.7, 56.7))));
+--------------------------------------------------------------+
| st_astext(st_geomfromwkb(st_asbinary(st_point(24.7, 56.7)))) |
+--------------------------------------------------------------+
| POINT (24.7 56.7) |
+--------------------------------------------------------------+
select ST_AsText(ST_GeometryFromWKB(ST_AsBinary(ST_GeometryFromText("LINESTRING (1 1, 2 2)"))));
+------------------------------------------------------------------------------------------+
| st_astext(st_geometryfromwkb(st_asbinary(st_geometryfromtext('LINESTRING (1 1, 2 2)')))) |
+------------------------------------------------------------------------------------------+
| LINESTRING (1 1, 2 2) |
+------------------------------------------------------------------------------------------+
select ST_AsText(ST_GeometryFromWKB(ST_AsBinary(ST_Polygon("POLYGON ((114.104486 22.547119,114.093758 22.547753,114.096504 22.532057,114.104229 22.539826,114.106203 22.542680,114.104486 22.547119))"))));
+-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| st_astext(st_geometryfromwkb(st_asbinary(st_polygon('POLYGON ((114.104486 22.547119,114.093758 22.547753,114.096504 22.532057,114.104229 22.539826,114.106203 22.542680,114.104486 22.547119))')))) |
+-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| POLYGON ((114.104486 22.547119, 114.093758 22.547753, 114.096504 22.532057, 114.104229 22.539826, 114.106203 22.54268, 114.104486 22.547119)) |
+-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
select ST_AsText(ST_GeomFromWKB(ST_AsBinary(ST_Polygon("POLYGON ((114.104486 22.547119,114.093758 22.547753,114.096504 22.532057,114.104229 22.539826,114.106203 22.542680,114.104486 22.547119))"))));
+-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| st_astext(st_geomfromwkb(st_asbinary(st_polygon('POLYGON ((114.104486 22.547119,114.093758 22.547753,114.096504 22.532057,114.104229 22.539826,114.106203 22.542680,114.104486 22.547119))')))) |
+-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| POLYGON ((114.104486 22.547119, 114.093758 22.547753, 114.096504 22.532057, 114.104229 22.539826, 114.106203 22.54268, 114.104486 22.547119)) |
+-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+