Thanks Dudu.. So I make changes to use Union All.
So i hope there is no bultin- udf for doing this functionality
On 4/5/2016 2:08 PM, Markovitz, Dudu wrote:
Hi
Please make sure you are use “union all” and not “union”.
“union all” just spools one query result after the other.
“union” eliminates duplicated rows, therefore works much harder.
Dudu
*From:*mahender bigdata [mailto:mahender.bigd...@outlook.com]
*Sent:* Tuesday, April 05, 2016 11:50 PM
*To:* user@hive.apache.org
*Subject:* Re: Best way of Unpivoting of hiva table data. Any Analytic
function for unpivoting
Hi Adrew,
Sorry for delay in response. currently I'm using Select with Union :-)
. I would like to know is there any Built-in Hive UDF available for
unpivoting .
On 3/30/2016 2:23 PM, Andrew Sears wrote:
From mytable
Select id, 'mycol' as name, col1 as value
Union
Select id, 'mycol2' as name, col2 as value
Something like this might work for you?
Cheers,
Andrew
On Mon, Mar 28, 2016 at 7:53 PM, Ryan Harris
<ryan.har...@zionsbancorp.com
<mailto:ryan.har...@zionsbancorp.com>> wrote:
collect_list(col) will give you an array with all of the data
from that column
However, the scalability of this approach will have limits.
-----Original Message-----
From: mahender bigdata [mailto:mahender.bigd...@outlook.com]
Sent: Monday, March 28, 2016 5:47 PM
To: user@hive.apache.org <mailto:user@hive.apache.org>
Subject: Best way of Unpivoting of hiva table data. Any
Analytic function for unpivoting
Hi,
Has any one implemented Unpivoting of Hive external table
data. We would
like Convert Columns into Multiple Rows. We have external
table, which
holds almost 2 GB of Data. is there best and quicker way of
Converting
columns into Row. Any Analytic functions available in Hive to
do Unpivoting.
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