Page History

...

For example: for more efficient execution, we introduce a new rule that pushes a filter through an operator O. Since the filter columns are not required by O anymore, the schema would change. However, a completely different plan might be chosen in the end due to improvements in the cost estimation in a new Flink version. In short: It is difficult to ensure savepoint compatibility in such a dynamic topology creation process.

Terminology

...

For clarification, we distinguish between the following terms:

...