ST_PointFromGeoHash(geohash_str, srid)

Returns a POINT value containing the decoded geohash value, given a
geohash string value.

The X and Y coordinates of the point are the longitude in the range
[−180, 180] and the latitude in the range [−90, 90], respectively.

If any argument is NULL, the return value is NULL. If any argument is
invalid, an error occurs.

The srid argument is an unsigned 32-bit integer.

The remarks in the description of ST_LatFromGeoHash() regarding the
maximum number of characters processed from the geohash_str argument
also apply to ST_PointFromGeoHash().

URL: https://dev.mysql.com/doc/refman/5.7/en/spatial-geohash-functions.html

