ST_AsBinary

ST_AsBinary

Syntax

VARCHAR ST_AsBinary(GEOMETRY geo)

Description

将一个几何图形转化为一个标准 WKB（Well-known binary）的表示形式。

目前支持对几何图形是：Point, LineString, Polygon。

example

mysql> select ST_AsBinary(st_point(24.7, 56.7));
+----------------------------------------------+
| st_asbinary(st_point(24.7, 56.7))            |
+----------------------------------------------+
| \x01010000003333333333b338409a99999999594c40 |
+----------------------------------------------+
1 row in set (0.01 sec)

mysql> select ST_AsBinary(ST_GeometryFromText("LINESTRING (1 1, 2 2)"));
+--------------------------------------------------------------------------------------+
| st_asbinary(st_geometryfromtext('LINESTRING (1 1, 2 2)'))                            |
+--------------------------------------------------------------------------------------+
| \x010200000002000000000000000000f03f000000000000f03f00000000000000400000000000000040 |
+--------------------------------------------------------------------------------------+
1 row in set (0.04 sec)

mysql> select 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_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))'))                                                         |
+------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| \x01030000000100000006000000f3380ce6af865c402d05a4fd0f8c364041ef8d2100865c403049658a398c3640b9fb1c1f2d865c409d9b36e334883640de921cb0ab865c40cf876709328a36402cefaa07cc865c407b319413ed8a3640f3380ce6af865c402d05a4fd0f8c3640 |
+------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
1 row in set (0.02 sec)

keywords

ST_ASBINARY,ST,ASBINARY