ST_Polygon,ST_PolyFromText,ST_PolygonFromText
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)) |
+------------------------------------------------------------------+keywords
ST_POLYGON,ST_POLYFROMTEXT,ST_POLYGONFROMTEXT,ST,POLYGON,POLYFROMTEXT,POLYGONFROMTEXT