Avoid selection of duplicate columns.

[tomek82]

This is a counterpart to #1865

In cases where the child of a MappedCollection maps the id or key column the select clause will have duplicate entries and thus generate the ResultSet warning in RowDocumentResultSetExtractor.

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[tomek82]

Apologies, I did not notice this has been changed since I've started working on this issue. Does not seem to reproduce on latest main. Perhaps this could be considered for 3.5.x?

[schauder]

#1865 is closed. If there still is a problem we first need a new issue with a reproducer.

[tomek82]

Is the unit test in the PR not enough? I can provide a sample project that shows this behavior if needed. It's still an issue on 3.5.3.

[schauder]

I can provide a sample project that shows this behavior if needed.

Please do so.

[schauder]

That's merged into 3.5.x and 3.4.x.

Thanks for your support.