This function is
EXPERIMENTAL. The behaviour of this function, the
name of this function, and anything else documented about this
function may change without notice in a future release of PHP.
Use this function at your own risk.
Get the SDO_DAS_ChangeSummary for an SDO_DAS_DataObject,
or NULL if it does not have one.
Parameters
None.
Return Values
Returns the SDO_DAS_ChangeSummary for an SDO_DAS_DataObject,
or NULL if it does not have one.
