Github user StephanEwen commented on the pull request:
https://github.com/apache/flink/pull/1214#issuecomment-146898360
When we grab the Optimizer Plan from interactive programs, we also have a
similar problem - we would in theory need to execute the whole program. What we
do instead is to grab the program part that constitutes the first portion (up
to the first job submission to the JobManager)
I agree with you, maybe we can do something like that. Failing all
interactive programs (in the sense of programs with a `main` function rather
than implementing the `Program` interface) is too much of a restriction.
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