MySQL 5.7 Reference Manual Including MySQL NDB Cluster 7.5 and NDB Cluster 7.6
        A Point consists of X and Y coordinates,
        which may be obtained using the following functions:
      
            Returns the X-coordinate value for the
            Point object p
            as a double-precision number.
          
mysql> SELECT ST_X(Point(56.7, 53.34));
+--------------------------+
| ST_X(Point(56.7, 53.34)) |
+--------------------------+
|                     56.7 |
+--------------------------+
            Returns the Y-coordinate value for the
            Point object p
            as a double-precision number.
          
mysql> SELECT ST_Y(Point(56.7, 53.34));
+--------------------------+
| ST_Y(Point(56.7, 53.34)) |
+--------------------------+
|                    53.34 |
+--------------------------+
            ST_X() and
            X() are synonyms. For more
            information, see the description of
            ST_X().
          
            X() is deprecated; expect it
            to be removed in a future MySQL release. Use
            ST_X() instead.
          
            ST_Y() and
            Y() are synonyms. For more
            information, see the description of
            ST_Y().
          
            Y() is deprecated; expect it
            to be removed in a future MySQL release. Use
            ST_Y() instead.