Github user gatorsmile commented on the issue: https://github.com/apache/spark/pull/21537 This is bad. The design needs to be carefully reviewed before implementing it. Basically, we breaks the basic principles of software engineering. It is very strange to write the design doc after introducing such a fundamental API change. I think we need more expertise in the existing compiler internal experts. That is why I proposed to let @kiszk to lead this. We are not inventing anything new in our codegen framework.
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