Checks whether the data of a trajectory object is stored in Object Storage Service (OSS).
Warning
This function is not supported in later versions. Use Cold data tiered storage instead.
Syntax
bool ST_IsExternal(trajectory traj);Parameters
| Parameter | Description |
|---|---|
| traj | The trajectory object. |
Return value
Returns t if the data of the specified trajectory object is stored in OSS. Otherwise, returns f.
Examples
SELECT ST_IsExternal(traj) FROM trajs;
st_isexternal
---------------
t
t
t
f
t
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