SELECT 
   CASE WHEN scl."Response" IS NOT NULL THEN xmltype(scl."Response") else null end as Response,
  sc."DataSourceId",
  sc."CreationTime",
  RespNR.ProcessDecision

FROM 
    svc."CallLog" scl,
    svc."Call" sc,
    XMLTable('$doc/Blablabla/Body/RecordNR'
            PASSING XMLTYPE(scl."Response") as "doc"
            COLUMNS 
                ProcessDecision           VARCHAR2(255)        PATH 'S1_Process_Decision/@v'
            ) RespNR
  where 
     scl."S1CallLogID" = sc."S1CallLogID"(+) 
AND   sc."DataSourceId" IN
(
  11111111
);