boolean isSkewedCol(String alias, QB qb, String colName) {
    return qb.getSkewedColumnNames(alias).stream()
        .anyMatch(skewedCol -> skewedCol.equalsIgnoreCase(colName));
  }
if the column is a skewed column, use ColumnInfo accordingly
ql/src/java/org/apache/hadoop/hive/ql/parse/SemanticAnalyzer.java