You can use this function to check whether the data of a trajectory object is stored in Object Storage Service (OSS).

Syntax

bool ST_IsExternal(trajectory traj);

Parameters

Parameter Description
traj The trajectory object.

Description

If the data of the specified trajectory object is stored in OSS, the function returns true. Otherwise, this function returns false.

Examples

select ST_IsExternal(traj) from trajs;
 st_isexternal 
---------------
 t
 t
 t
 f
 t
(5 rows)