Hi,
I've implemented a SSIS 2017 package having a merge transformation and an aggregate transformation.
In the aggregate transformation I've specified a group by operation for a DT_WSTR code and a count distinct for the same code.
In the merge join transformation as join Keys I've specified the code from the aggregate transformation, on the right side, and the equivalent code on the left side: for a specified value for the matching code no values are returned from the right side (aggregate transformation). I've queried the corresponding source table and I can see that the two codes match rightly.
How can I solve this issue? Can I use an aggregate transformation before a merge transformation? Is there a bug? Thanks
Obviously, I've ordered the two sources for the merge join transformation.