-Re: why I get Table not found 'dual'
Edward Capriolo 2012-10-18, 16:12
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.
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:
> 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.
> 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?