Search code examples
countertalend

Talend increment counter

I'm making a ETL in Talend that add data in a table.

The table is for a old system and the primary key is not auto-incremental. So I have to get the maximum id plus one every time that I insert a value in the table.

I'm trying to use a var in the Expression Builder:

  • first I save the max and set in a context variable

  • then in the Expression Builder:

    Context.Max += 1

The problem is that every time I get the same id, I need to save the sum.

Solution

  • Finally I found what was looking for:

    Numeric.sequence("var2", Context.Max, 1)

    This increment by 1 the Context.Max and save it in "var2".