如何在Hive表中更新？

Question

I have a table in Hive I want update the value in one column. I know Hive will not support row level update. There any other way achieve this?

If so pls share the query with me.

Thanks Venkat

Answer 1

hive supports insert,update and delete from hive0.14 or

otherwise use case statements to achieve your update

for example if col3 needs to be udpated

Insert overwrite table tablename
select col1,col2,
case when condition then value else value end as col3 
from tablename

Answer 2

As of Hive version 0.14.0: INSERT VALUES, UPDATE, and DELETE are now available with full ACID support

UPDATE Syntax:

UPDATE tablename SET column = value [, column = value ...] [WHERE expression]