Find RowNumber in Talend - talend

Question

How to find row number in Talend Open Studio 6.3?I want to insert rows in a order like
Row 1 to Row 10 in File1
Row 11 to Row 20 in File2
Row 21 to Row30 to File3
And then again from Row 31 to file1
How to achive that?I have generated a sequence column.now how to proceed?is it can be done using tsamplerow?
Suppose the Sourcefile is like this:-
EMPNO,EMPNAME,DEPTNO
10,A,1
11,B,2
12,C,3
13,D,4
14,E,1
15,F,1
16,G,2
17,H,3
18,I,4
19,J,2
20,K,3
21,L,1
22,M,2

Answer 1

You can get the current row number by defining an increment value in talend job using Numeric.sequence("s1",1,1).
Note: I have used OP's sample data and divided rows per file as 3. But in OP's scenario it is 10 rows
Below is the sample job which I tried out,
I am generating a sequence number to know the current row number like below
After getting the current row value, I have an another variable which will be incremented for every 3 rows (in my example) like below (in OP's example, it is for every 10 rows.)
This is the expression I am doing on SequenceRow context variable.
context.SequenceRow = (input_row.SequenceNumber > context.RowRangePerFile && input_row.SequenceNumber % context.RowRangePerFile == 1) ? context.SequenceRow+1 : context.SequenceRow;
Finally I am filtering the rows in tMap_2 based on the SequenceRow value, like below,
For out1, the filter condition is (out2.SequenceRow > context.TotalNoOfFiles && out2.SequenceRow % context.TotalNoOfFiles == 1) || out2.SequenceRow == 1
For out3, the filter condition is (out2.SequenceRow > context.TotalNoOfFiles && out2.SequenceRow % context.TotalNoOfFiles == 2) || out2.SequenceRow == 2
For out4, the filter condition is (out2.SequenceRow > context.TotalNoOfFiles && out2.SequenceRow % context.TotalNoOfFiles == 0) || out2.SequenceRow == 3
I have taken your sample data that you have provided in your question,
EMPNO,EMPNAME,DEPTNO
10,A,1
11,B,2
12,C,3
13,D,4
14,E,1
15,F,1
16,G,2
17,H,3
18,I,4
19,J,2
20,K,3
21,L,1
22,M,2
and I am writing every 3 rows in each file and the output I got is
Hope this may help you.