topic Re: how to set dynamic column in talend in Talend Studio

how to set dynamic column in talend

Varsha3 — Wed, 16 Sep 2015 06:02:00 GMT

Hi,
I am newbie using talend,
I want to get cleared in dynamic column concept.I had read many posts on dynamic schema but I still I am confused.
Pls anyone help me in understanding this concept.
Fore example,
id;name;status
1;dev;wk
2;diya;wk
3;priya;nwk
4;shiva;wk
5;guna;nwk

id;name;age
1;dev;23
2;diya;24
3;priya;23
4;shiva;21
5;guna;25

id;age;status
1;23;wk
2;24;wk
3;23;nwk
4;21;wk
5;25;nwk

but my output should have id,name,status,age as constant schema.
Any suggestions.......thanks in advance..

Thanks
AKRISH

Re: how to set dynamic column in talend

Anonymous — Wed, 16 Sep 2015 07:49:22 GMT

Hi AKRISH,

Talend Dynamic Schema feature allows you to design schema with an unknown column structure (unknown name and number of columns).
Please have a look at KB article about: TalendHelpCenter:How to process changing data structure?
Note:

The dynamic schema functionality is only available in Talend enterprise subscription version not open source.

Best regards
Sabrina

Re: how to set dynamic column in talend

Varsha3 — Wed, 16 Sep 2015 08:39:57 GMT

Hi Sabrina,
Thanks Sabrina for your instant reply....
I had already gone through the same link provided by you in another post but still I couldn't get into the concept and implement on my job described above.
I tried with tfilelist,tfileinputdelimited, tmap (or) tjavarow,tlogrow components with context variables but it throws error.
Could you pls explain me the procedure to solve this job.

Thanks
Akrish

Re: how to set dynamic column in talend

Anonymous — Wed, 16 Sep 2015 10:04:00 GMT

You don't need the Dynamic Schema functionality to do what you want to do. So if you are using Open Studio, it is still possible. I have written a tutorial (with an example job) on how to achieve this here.

Re: how to set dynamic column in talend

Varsha3 — Wed, 16 Sep 2015 10:54:22 GMT

Hi Rilhia solutions,
Thanks for your suggestion...
My Output should be
id;name;status;age
1;dev;wk;null
2;diya;wk;null
3;priya;nwk;null
4;shiva;wk;null
5;guna;nwk;null
id;name;status ;age
1;dev;null ;23
2;diya;null ;24
3;priya;null ;23
4;shiva;null ;21
5;guna;null ;25

id;name;status;age
1;null;wk;23
2;null;wk;24
3;null;nwk;23
4;null;wk;21
5;null;nwk;25

Thanks
Akrish

Re: how to set dynamic column in talend

Anonymous — Wed, 16 Sep 2015 11:43:35 GMT

This will work. If you know the expected column headings and they appear at the top of each file, this solution will work. Obviously it will need to be slightly reworked to suit your data.