YuvalItzchakov commented on pull request #15307:
URL: https://github.com/apache/flink/pull/15307#issuecomment-812995554
@fsk119 I've added a test to check computed column pushdown and it's
failing. The optimized plan that is being generated is:
```
FlinkLogicalCalc(select=[event_time, price, quantity, cost])
+- FlinkLogicalCalc(select=[event_time, price, quantity, cost],
where=[>(cost, 20)])
+- FlinkLogicalCalc(select=[Reinterpret(event_time) AS event_time, price,
quantity, *(price, quantity) AS cost])
+- FlinkLogicalTableSourceScan(table=[[default_catalog,
default_database, WithWatermark, watermark=[$0]]], fields=[event_time, price,
quantity])
```
It seems that First a `LogicalCalc` is being created with the computed
columns and only then an additional `LogicalCalc` with the filter. I'm assuming
this is a bug?
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