Hi all,
I have found an old thread [1] where there was a question about SQL joins
on nested fields.

The conclusion was that (quote):


*"temporal table join doesn't support join on a nested join.In blink
planner, a temporal table join will be translated into lookup joinwhich
will use the equality condition fields as the lookup keys."*

The thread is from 2020 and I was wondering if there is any plan/ticket
about adding support for nested fields to lookup join/temporal join

I've checked this use case on Flink 1.15.2 and it seems still not supported.

[1] https://lists.apache.org/thread/o3fc5lrqf6dbkl9pm0rp2mqyt7mcnsv3

Best Regards,
Krzysztof Chmielewski
SQL join on nested field

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