Github user fhueske commented on a diff in the pull request:
https://github.com/apache/flink/pull/3791#discussion_r114199929
--- Diff:
flink-libraries/flink-table/src/main/scala/org/apache/flink/table/plan/rules/dataSet/DataSetCorrelateRule.scala
---
@@ -60,10 +60,14 @@ class DataSetCorrelateRule
case rel: RelSubset =>
convertToCorrelate(rel.getRelList.get(0), condition)
- case calc: FlinkLogicalCalc =>
+ case calc: FlinkLogicalCalc => {
--- End diff --
We should (later?) add optimization rules to prevent that expressions are
pushed below the join towards the table function (and are pushed above the join
if they are already below the join).
For now we should just ensure that we do not compute incorrect results.
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