ST_mdistance-PolarDB(PolarDB)-阿里云帮助中心

Returns an array of Euclidean distances between two trajectory objects, computed at each shared time point.

Syntax

float[] ST_mdistance(trajectory traj1, trajectory traj2);

Parameter	Description
`traj1`	The first trajectory object.
`traj2`	The second trajectory object.

The returned distances are not standardized.

SELECT ST_mDistance(
  (SELECT traj FROM traj_table WHERE id = 1),
  (SELECT traj FROM traj_table WHERE id = 2)
);