checking if point is in polygon giving null values - mysql

Question

there are many post relating to this matter but most are old and there seem to be many different way of doing it.
I am trying to see if point exists inside a polygon however it is giving null value even though it is point on polygon.
here is my code.
select ST_contains(ST_geomfromtext('
Polygon((127.090656 37.517137,
127.092416 37.512525,
127.098445 37.513836,
127.095227 37.518346))'), Point(127.090656, 37.517137));
Thanks in advance.

Answer 1

In Mysql you need to close the polygon therefore I must add first point at the end of polygon again.
select ST_contains(ST_geomfromtext('
Polygon((**127.090656 37.517137**,
127.092416 37.512525,
127.098445 37.513836,
127.095227 37.518346,
**127.090656 37.517137**))'), Point(127.090656, 37.517137));
which now fixes my problem
and for cleaniness
I can set polygon as
SET #location_1 = ST_geomfromtext('
Polygon((**127.090656 37.517137**,
127.092416 37.512525,
127.098445 37.513836,
127.095227 37.518346,
**127.090656 37.517137**))');
select ST_contains( #location_1, Point(127.090656, 37.517137));
which to me is much cleaner. But maybe it require more memory for #location_1 in db (I'm not sure)?