Ed's solution is clearly superior(!), if, your admin team will install it. In some cases, your admin may not wish to do so. In such cases, the below 'self-service' method will work. :-)
---
Mark E. Sunderlin
Solutions Architect |AOL Core Data Technologies
P: 703-265-6935 |C: 540-327-6222 | AIM: MESunderlin
22000 AOL Way | Dulles, VA | 20166
-----Original Message-----
From: Edward Capriolo [mailto:[EMAIL PROTECTED]]
Sent: Thursday, October 18, 2012 12:13 PM
To: [EMAIL PROTECTED]
Subject: Re: why I get Table not found 'dual'
That way works but if someone accidentally adds a second row or deletes the first row dual stops working right.
This was why I wrote dual input format. It always works right regardless if the table has data.
Edward
On Thu, Oct 18, 2012 at 12:09 PM, Sunderlin, Mark <[EMAIL PROTECTED]> wrote:
> I creates a single column, single row table called 'dual'
>
>
> 1. Create a text file on HDFS, call it a.txt with just the letter 'a' (or any single character in it)
> 2. Create the single column table, dual: 'create table dual (x, string);'
> 3. Load the text file into dual: load data local inpath '... /a.txt' overwrite into table dual; (replace '...' with the path to the HDFS directory you created a.txt in)
> 4. Enjoy using it just like you do in Oracle: select parse_url('
http://autos.aol.com/gallery/best-trucks-fuel-economy/', 'HOST') from dual
>
> A quick AOL search and I see this guy did pretty much the same:
>
>
http://bigdatadw.blogspot.com/2012/02/dual-table-in-hive.html>
> ---
> Mark E. Sunderlin
> Solutions Architect |AOL Core Data Technologies
> P: 703-265-6935 |C: 540-327-6222 | AIM: MESunderlin
> 22000 AOL Way | Dulles, VA | 20166
>
> -----Original Message-----
> From: Kaufman Ng [mailto:[EMAIL PROTECTED]]
> Sent: Thursday, October 18, 2012 9:45 AM
> To: [EMAIL PROTECTED]
> Cc: fellowtree
> Subject: Re: why i get Table not found 'dual'
>
> The 'dual' table is a feature in Oracle only I believe.
>
> There's an open Jira for this. You can try Edward Capriolo's project (described in the jira) which allows you to use dual.
>
https://issues.apache.org/jira/browse/HIVE-1558>
> On Thu, Oct 18, 2012 at 2:29 AM, MiaoMiao <[EMAIL PROTECTED]> wrote:
>> Do you even have a table name 'dual' or not?
>>
>> On Thu, Oct 18, 2012 at 2:24 PM, fellowtree <[EMAIL PROTECTED]> wrote:
>>> hi all:
>>> some one said hive support sql like select if(1=2,100,200)
>>> from dual; however i always get Table not found 'dual' . my hive is
>>> 0.9.0 and what is the reason?
>>>
>>> ________________________________
>>> fellowtree
