Question

description

Syntax

GEOMETRY ST_Polygon(VARCHAR wkt)

将一个WKT（Well Known Text）转化为对应的多边形内存形式

example

mysql> SELECT ST_AsText(ST_Polygon("POLYGON ((0 0, 10 0, 10 10, 0 10, 0 0))"));
+------------------------------------------------------------------+
| st_astext(st_polygon('POLYGON ((0 0, 10 0, 10 10, 0 10, 0 0))')) |
+------------------------------------------------------------------+
| POLYGON ((0 0, 10 0, 10 10, 0 10, 0 0))                          |
+------------------------------------------------------------------+

keyword

ST_POLYGON,ST_POLYFROMTEXT,ST_POLYGONFROMTEXT,ST,POLYGON,POLYFROMTEXT,POLYGONFROMTEXT