Syntax
------

ST_IsSimple(g)
IsSimple(g)

Description
-----------

Returns true if the given Geometry has no anomalous geometric points, false if
it does, or NULL if given a NULL value.

ST_IsSimple() and IsSimple() are synonyms.

Examples
--------

A POINT is always simple.

SET @g = 'Point(1 2)';

SELECT ST_ISSIMPLE(GEOMFROMTEXT(@g));
+-------------------------------+
| ST_ISSIMPLE(GEOMFROMTEXT(@g)) |
+-------------------------------+
|                             1 |
+-------------------------------+

URL: https://mariadb.com/kb/en/st_issimple/