execContext.setJc(jc);
// create map and fetch operators
MapWork mrwork = (MapWork) cache.retrieve(PLAN_KEY);
if (mrwork == null) {
mrwork = Utilities.getMapWork(job);
cache.cache(PLAN_KEY, mrwork);
} else {
Utilities.setMapWork(job, mrwork);
}
if (mrwork.getVectorMode()) {
mo = new VectorMapOperator();