public static boolean getIsVectorized(Configuration conf, MapWork mapWork) {
    return HiveConf.getBoolVar(conf, HiveConf.ConfVars.HIVE_VECTORIZATION_ENABLED) &&
        mapWork.getVectorMode();
  }
Returns true if a plan is both configured for vectorized execution
and the node is vectorized.

The plan may be configured for vectorization
but vectorization disallowed eg. for FetchOperator execution.
ql/src/java/org/apache/hadoop/hive/ql/exec/Utilities.java