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    ApsaraDB RDS:ST_IsExternal

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    ApsaraDB RDS:ST_IsExternal

    Last Updated:Mar 28, 2026

    Checks whether the data of a trajectory object is stored in Object Storage Service (OSS).

    Syntax

    bool ST_IsExternal(trajectory traj);

    Parameters

    ParameterDescription
    trajThe 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
(5 rows)