Upddate RowExpression to Warn if a simple field is aliased to an existing field

[ibraunegrego]

Related to: #15458

Upddate RowExpression to Warn if a simple field is aliased to an existing field

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• :white_check_mark: ibraunegrego (530e0a093cbf770185a6bf46bc84bf8a90e59157)

[ibraunegrego]

Hi, can you give me a feedback about this pull request, please?

[stale[bot]]

This pull request has been automatically marked as stale because it has not had recent activity. If you'd still like this PR merged, please comment on the task, make sure you've addressed reviewer comments, and rebase on the latest master. Thank you for your contributions!

[prestoprobot]

@kaikalur Friendly ping. Please review this PR. Thank you!