public boolean isSameColumnForRR(ColumnInfo other) {
    return checkEquals(tabAlias, other.tabAlias)
        && checkEquals(alias, other.alias)
        && checkEquals(internalName, other.internalName)
        && checkEquals(getType(), other.getType());
  }
@param isSkewedCol the isSkewedCol to set
ql/src/java/org/apache/hadoop/hive/ql/exec/ColumnInfo.java