Cool! Thanks for sharing.
From: Stephen Sprague [mailto:sprag...@gmail.com]
Sent: Wednesday, January 08, 2014 5:12 AM
To: user@hive.apache.org
Subject: Re: working with HIVE VARIALBE: Pls suggest
wow. that's pretty clever! a+ for ingenuity! :)
As a side bar I tend to use shell variables more often than not using this
idiom.
#!/bin/bash
id=blah
hive <<SQL
select foo from bar where id='$id';
quit;
SQL
and if you wanted the output in a *shell* variable then:
#!/bin/bash
id=blah
var=$(hive <<SQL
select foo from bar where id='$id';
quit;
SQL
)
of course for one liners like the above you might as well use -e though. eg.
var=$(hive -e 'select foo from bar where id='$id') but for longer stuff the
"here doc" makes for better reading.
something to keep in mind anyway.
On Mon, Jan 6, 2014 at 6:48 PM, Sun, Rui
<rui....@intel.com<mailto:rui....@intel.com>> wrote:
Directly saving the query result into a variable is not supported now. You may
consider saving the result into an intermediate table or file to be used by
subsequent queries.
If you indeed want a variable, here is some trick you may try:
Hive -e "insert overwrite local directory '/tmp/result' select max(salary) from
Hive_employe_table"
Hive -e -hiveconf MY_VAR =`cat /tmp/result/000000_0`
From: yogesh dhari [mailto:yogeshh...@gmail.com<mailto:yogeshh...@gmail.com>]
Sent: Tuesday, January 07, 2014 2:25 AM
To: user@hive.apache.org<mailto:user@hive.apache.org>
Subject: Re: working with HIVE VARIALBE: Pls suggest
Thanks all for your help..
I think was not so much clear about what I was trying to do...
I was just trying to create a variable in Hive like in RDBMS, and want to
store the result of a query into that variable.
lets say,
I have declared a variable MY_VAR
I want to store the result of hive query "select max(salary) from
Hive_employe_table" ;
into MY_VAR
Is it possible in Hive ? if yes then how to achieve..
Thanks a lot in advance.
Pls suggest or to work around it
Thanks & Regards
Yogesh
On Mon, Jan 6, 2014 at 12:36 PM, lxw <lxw1...@qq.com<mailto:lxw1...@qq.com>>
wrote:
maybe you can see:
https://cwiki.apache.org/confluence/plugins/viewsource/viewpagesrc.action?pageId=30754722
------------------ Original ------------------
From: "yogesh dhari";<yogeshh...@gmail.com<mailto:yogeshh...@gmail.com>>;
Date: Fri, Jan 3, 2014 01:13 AM
To: "user"<user@hive.apache.org<mailto:user@hive.apache.org>>;
Subject: working with HIVE VARIALBE: Pls suggest
Hello Hive Champs,
I have a case statement, where I need to check the date passed through
parameter,
If date is 1st date of the month then keep it as it as
else
set the parameter date to 1st date of the month.
and then later opretation are being performed on that date into hive quries,
I have wrote this Hive QL
select case when as_of_dt = ${hivevar:as_of_dt} then ${hivevar:as_of_dt} else
date_sub(${hivevar:as_of_dt} , (day(${hivevar:as_of_dt} )) -1 ) end as as_of_dt
from TABLE group by as_of_dt ;
O/P of this query is, lets say = 2012-08-01
I want to store the value of this Query into a variable.
like
MY_VARIABLE = (select case when as_of_dt = ${hivevar:as_of_dt} then
${hivevar:as_of_dt} else date_sub(${hivevar:as_of_dt} ,
(day(${hivevar:as_of_dt} )) -1 ) end as as_of_dt from TABLE group by as_of_dt; )
How to achieve that.
Pls suggest,
Thanks in advance
