dbplus_getunique Get an id number unique to a relation intdbplus_getunique resourcerelation intuniqueid &warn.experimental.func; dbplus_getunique will obtain a number guaranteed to be unique for the given relation and will pass it back in the variable given as uniqueid. The function will return zero (aka. DBPLUS_ERR_NOERR) on success or a db++ error code on failure. See dbplus_errcode or the introduction to this chapter for more information on db++ error codes.