Hadoop Hive Avro回忆刚刚写好的字段

我正在使用配置单元并试图写入一个表，我想知道是否可以调用我刚刚写入的字段，以便创建另一个字段变量

Case When Substr(Upper(Trim(MBRCHR)),-3) rlike '[8-9][0-9][A-E]'
    Then
        Substr(Upper(trim(regexp_replace(MBRCHR,'[^0-9]',''))),1,Length(Upper(Trim(regexp_replace(MBRCHR,'[^0-9]',''))))-2)
    Else
        Upper(trim(regexp_replace(MBRCHR,'[^0-9]+','')))
    End as MBR_DRVD,
Case when Length(MBR_DRVD) between 7 and 9
    Then ***** use this to derive the new field.

我试着这样写，但是因为MBR_DRVD不在我填充当前表的表中，所以它出错了

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如果您有任何建议，我们将不胜感激。

不可能直接执行，您可以使用类似

select ....
Case when Length(MBR_DRVD) between 7 and 9
        Then ***** use this to derive the new field.
from (
select 
Case When Substr(Upper(Trim(MBRCHR)),-3) rlike '[8-9][0-9][A-E]'
    Then
        Substr(Upper(trim(regexp_replace(MBRCHR,'[^0-9]',''))),1,Length(Upper(Trim(regexp_replace(MBRCHR,'[^0-9]',''))))-2)
    Else
        Upper(trim(regexp_replace(MBRCHR,'[^0-9]+','')))
    End as MBR_DRVD,
...
from yourtable
) t;