public static void setColumnNameList(JobConf jobConf, Operator op, boolean excludeVCs) {
    RowSchema rowSchema = op.getSchema();
    setColumnNameList(jobConf, rowSchema, excludeVCs);
  }
Construct a list of full partition spec from Dynamic Partition Context and the directory names
corresponding to these dynamic partitions.
ql/src/java/org/apache/hadoop/hive/ql/exec/Utilities.java