Hi,
I am looking for a way to propagate a column all the way from the source to
the sink, without the knowledge of whoever is applying transformations on
the tables.

I looked into SupportsReadingMetadata, and saw that it is able to "tag"
tables with metadata. I was wondering, does this tag flow between the
different projections and joins the table goes through? If not, what could
be alternatives to achieve flowing some column A between all table
transformations such that I can provide some "metadata" context that is
coming in from the source itself?
-- 
Best Regards,
Yuval Itzchakov.

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