Checks 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. |
Return values
Returns t if the trajectory object's data is stored in OSS. Returns f otherwise.
Examples
SELECT ST_IsExternal(traj) FROM trajs;
st_isexternal
---------------
t
t
t
f
t
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