ST_ISSIMPLE

ST_IsSimple(g)

Returns 1 if the geometry value g is simple according to the ISO SQL/MM
Part 3: Spatial standard. ST_IsSimple() returns 0 if the argument is
not simple.

The descriptions of the instantiable geometric classes given under
https://dev.mysql.com/doc/refman/8.0/en/opengis-geometry-model.html
include the specific conditions that cause class instances to be
classified as not simple.

ST_IsSimple() handles its arguments as described in the introduction to
this section, with this exception:

o If the geometry has a geographic SRS with a longitude or latitude
that is out of range, an error occurs:

o If a longitude argument is not in the range (?180, 180], an
ER_GEOMETRY_PARAM_LONGITUDE_OUT_OF_RANGE
(https://dev.mysql.com/doc/mysql-errors/8.0/en/server-error-referen
ce.html#error_er_geometry_param_longitude_out_of_range) error
occurs (ER_LONGITUDE_OUT_OF_RANGE
(https://dev.mysql.com/doc/mysql-errors/8.0/en/server-error-referen
ce.html#error_er_longitude_out_of_range) prior to MySQL 8.0.12).

o If a latitude argument is not in the range [?90, 90], an
ER_GEOMETRY_PARAM_LATITUDE_OUT_OF_RANGE
(https://dev.mysql.com/doc/mysql-errors/8.0/en/server-error-referen
ce.html#error_er_geometry_param_latitude_out_of_range) error occurs
(ER_LATITUDE_OUT_OF_RANGE
(https://dev.mysql.com/doc/mysql-errors/8.0/en/server-error-referen
ce.html#error_er_latitude_out_of_range) prior to MySQL 8.0.12).

Ranges shown are in degrees. The exact range limits deviate slightly
due to floating-point arithmetic.

URL: https://dev.mysql.com/doc/refman/8.0/en/gis-general-property-functions.html