FYI,
Latest hive 0.14/parquet will have column renaming support.
Jianshi
On Wed, Dec 10, 2014 at 3:37 AM, Michael Armbrust
wrote:
> You might also try out the recently added support for views.
>
> On Mon, Dec 8, 2014 at 9:31 PM, Jianshi Huang
> wrote:
>
>> Ah... I see. Thanks for pointing it
You might also try out the recently added support for views.
On Mon, Dec 8, 2014 at 9:31 PM, Jianshi Huang
wrote:
> Ah... I see. Thanks for pointing it out.
>
> Then it means we cannot mount external table using customized column
> names. hmm...
>
> Then the only option left is to use a subquery
Ah... I see. Thanks for pointing it out.
Then it means we cannot mount external table using customized column names.
hmm...
Then the only option left is to use a subquery to add a bunch of column
alias. I'll try it later.
Thanks,
Jianshi
On Tue, Dec 9, 2014 at 3:34 AM, Michael Armbrust
wrote:
This is by hive's design. From the Hive documentation:
The column change command will only modify Hive's metadata, and will not
> modify data. Users should make sure the actual data layout of the
> table/partition conforms with the metadata definition.
On Sat, Dec 6, 2014 at 8:28 PM, Jianshi H
Ok, found another possible bug in Hive.
My current solution is to use ALTER TABLE CHANGE to rename the column names.
The problem is after renaming the column names, the value of the columns
became all NULL.
Before renaming:
scala> sql("select `sorted::cre_ts` from pmt limit 1").collect
res12: Ar
