語法

float8 S?T_nearestApproachDistance(trajectory traj,  trajectory traj2);
float8 S?T_nearestApproachDistance(trajectory traj,  trajectory traj2, tsrange range);
float8 S?T_nearestApproachDistance(trajectory traj,  trajectory traj2, timestamp t1, timestamp t2);

參數

示例

Select ST_nearestApproachDistance((Select traj from traj_table where id=1), (Select traj from traj_table where id=2), '2010-1-1 13:00:00', '2010-1-1 14:00:00');