Assigning a database value to a context variable in Talend

Question

In my database table, I have 2 columns containing username and userId. Now I want to send this data to an XML file such that a new XML file is created per user based on the username. In order to do so, I am trying to set a value from my database table to the context variable. My job looks something like following:

tAccessDatabase_1 ---> tFileOutputXML_1

But its not working out. Can someone suggest me a solution?

Answer 1

You can try following the below steps:

1. Select a distinct username from the database table.

2. Now, to iterate on each of the usernames add a tFlowToIterate component.

3. By using an iterate link, connect a tJava component.

4. Then you can assign the username to context variable by using tJava component. Then type: context.username=row1.username.

5. Now, connect the tJava component to a table component by using 'OnComponentOk' trigger to select data from the table based on the where condition: username='"+context variable+"'.

6. Finally, you can write data into a file. Provide the filename as: "<path>\"+context.username.

Hope this helps.

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Thanks.

Answer 2

Hi,
You can do one thing -
1) In tDBinput_1 use below query -
select KeyValue AS DBKeyValue
from KeyTable
where KeyName='MaxIdValue'

2) Put DBKeyValue in the schema of tDBInput.

3) Add Context variable in context section. Consider context name is : MaxKeyValue
3) After that use tJavaRow and use below code -
context.MaxKeyValue = input_row.DBKeyValue
Don't forget to add this context variable in the context section.

Best Regards,
Siddharth Poddar

poddarsiddharth1990@gmail.com