Here's a patch with the validation idea:
https://github.com/apache/druid/pull/15920
It adds validation for the most problematic case (mixing strings and arrays),
provides a way to override the validation, and makes the warning log on the
controller task when arrayIngestMode is 'mvd' more
I just learned that arrayIngestMode is not actually new, just
https://github.com/apache/druid/pull/15588 is. However this will still make
it more likely that people accidentally break their tables, so I am still
-0. Just, slightly less so. I still think it would be a good idea, for
Druid 29, to
Thanks for managing this release!
My vote is -0, let me explain why. I am concerned about usability issues
with the new arrayIngestMode feature. There are various issues when mixing
MVD strings and string arrays in the same column: as soon as arrays show up
in a column, various "classic
