This is a custom NonCumulativeCost Handler just before transforming the logical plan to the physical plan. This way we can do things like cleaning the cache before computing the cost, implementing custom methods for cost estimation of Calcite's logical nodes without overriding them,...
This is done only for the PTransform path. Later it should also be done for JDBC path.

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Post-Commit Tests Status (on master branch)

Lang	SDK	Apex	Dataflow	Flink	Gearpump	Samza	Spark
Go		---	---		---	---
Java
Python		---			---	---

Pre-Commit Tests Status (on master branch)

---	Java	Python	Go	Website
Non-portable
Portable	---		---	---

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