davidradl commented on PR #26514:
URL: https://github.com/apache/flink/pull/26514#issuecomment-2835102889
@morazow If I am understanding this correctly, the filtered pushed down
joins cause the Volcano planner to uniquely identify
each look up join.
I wonder what happens if one of the lookup joins supports filter push down
but the other doesn't? Does the <PUSHED-DOWN-FILTERS> include the name of the
source as well as the filter? It would be good to have tests for when both
sources support filter pushdown, neither do and only 1 does.
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