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From Manisha Gayathri <mani...@wso2.com>
Subject Re: Possibility of defining the Output directory programmatically
Date Mon, 23 Jul 2012 09:57:33 GMT
Thanks Vinod.

I tried concatenating variables. But that is also not possible as I see.
set pqr = concat(foo,bar);
set file_name= home/user/Desktop

Then the file_name I am getting is *NOT*  home/user/Desktop/foo_bar
But what I am getting is, /home/user/Desktop/concat(foo,bar)



On Mon, Jul 23, 2012 at 3:04 PM, Vinod Singh <vinod@vinodsingh.com> wrote:

> We generate variables dynamically and then create a final script file by
> concatenating variables (SET commands) and Hive queries. Then final script
> is executed. Probably you can adopt something similar approach.
>
> Thanks,
> Vinod
>
> 2012/7/23 Manisha Gayathri <manisha@wso2.com>
>
>> Thanks again Vinod.
>>
>> Will try to find a way to pass the directory URLs from outside then.
>> And it would be grateful if you can direct me to any guide or
>> documentation that describes how to pass values from outside of Hive.
>>
>> Thanks
>> Manisha
>>
>>
>> On Mon, Jul 23, 2012 at 2:08 PM, Vinod Singh <vinod@vinodsingh.com>wrote:
>>
>>> SET commands are handled differently and UDFs can't be invoked there.
>>> IMO you need to pass the directory location value from outside of Hive.
>>> That is how we do.
>>>
>>> Thanks,
>>> Vinod
>>>
>>> 2012/7/23 Manisha Gayathri <manisha@wso2.com>
>>>
>>>> Hi Vinod,
>>>>
>>>> Thanks for the prompt reply.
>>>> Understood your point and sorry for not providing the complete code
>>>> segment earlier.
>>>>
>>>> I have the getFilePath function which should return a URL like this.
>>>>
>>>> home/user/Desktop/logDir/logs/log_0_testServer_2012_07_22
>>>>
>>>> The defined function works perfectly if I put *getFilePath(
>>>> "0","testServer" ) *into the *select* statement.
>>>>
>>>> But I want to get that particular URL as the *local directory name*.
>>>> (The requirement is such that this should not be hard-coded in the hive
>>>> query. Rather should be generated in the custom UDF. )
>>>>
>>>> So can I do something like I v shown below?
>>>>
>>>> *set file_name= getFilePath( "0","testServer" );    *//Define a
>>>> parameter.* *
>>>> *.................*
>>>> *..............*
>>>> *INSERT OVERWRITE LOCAL DIRECTORY 'file:///${hiveconf:file_name}'
>>>>                *//Assign the above parameter as the file URL
>>>>
>>>> I tried this way. But the directory name is returned as
>>>>
>>>> file:/getFilePath( "0" , "testServer" )
>>>>
>>>> Does that mean I cannot use UDF to define the local directory name? Or
>>>> am I doing anything wrong in here?
>>>>
>>>> Thanks
>>>> Manisha
>>>>
>>>> On Mon, Jul 23, 2012 at 1:47 PM, Vinod Singh <vinod@vinodsingh.com>wrote:
>>>>
>>>>> The output path in this query is already parameterized-
>>>>>
>>>>> *INSERT OVERWRITE LOCAL DIRECTORY 'file:///${hiveconf:file_name}'*
>>>>>
>>>>> Though UDF is not going to be invoked here.
>>>>>
>>>>> Thanks,
>>>>> Vinod
>>>>>
>>>>>
>>>>> 2012/7/23 Manisha Gayathri <manisha@wso2.com>
>>>>>
>>>>>> Hi
>>>>>>
>>>>>> Is there any possibility of defining the output directory of a hive
>>>>>> query using a Hive UDF?
>>>>>>
>>>>>> In my UDF, I am passing 2 parameters (as follows) and this generates
>>>>>> a file-system URL
>>>>>> *getFilePath( "0","testServer" );*
>>>>>>
>>>>>> Can I use the above getFilePath( "0","testServer" ) value, as the
>>>>>> Local Directory location as follows?
>>>>>> *INSERT OVERWRITE LOCAL DIRECTORY 'file:///${hiveconf:file_name}'*
>>>>>>
>>>>>> If above is not the correct way, could you please show me how to
do
>>>>>> it?
>>>>>> Your help is much appreciated!
>>>>>>
>>>>>> Thanks
>>>>>>
>>>>>> ~Regards
>>>>>> *Manisha Eleperuma*
>>>>>> Software Engineer
>>>>>>
>>>>>> *
>>>>>> *
>>>>>>
>>>>>>
>>>>>
>>>>
>>>>
>>>> --
>>>> ~Regards
>>>> *Manisha Eleperuma*
>>>> Software Engineer
>>>>
>>>>
>>>>
>>>
>>
>>
>> --
>> ~Regards
>> *Manisha Eleperuma*
>> Software Engineer
>>
>> *
>> *
>>
>>
>


-- 
~Regards
*Manisha Eleperuma*
Software Engineer
WSO2, Inc.: http://wso2.com
lean.enterprise.middleware

*mobile:  +94 71 8279777*
*
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