Github user hequn8128 commented on the issue:
https://github.com/apache/flink/pull/5347
Hi, @fhueske @twalthr ,
To solve the problem, we need to make the `estimateRowCount` in
`CommonCalc` more accurate. I will update the pr tomorrow. Anyway, cost model
can't solve the problem deterministically. The cost is just an estimate, so
multi-cals will exist under some circumstances.
As for correlate, to make sure unsupported exception won't be thrown, i
will double check whether multi calcs are exist, and merge the calcs if need
to.
What do you think ? Thanks, Hequn.
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