refactor: refactor query engine #1137
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It's strange that even though I retried CI, it still skipped the unit test. |
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@Rachelint This PR looks good to me. Let's merge it after the ci is fixed. |
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Rationale
Close #1136
Part of #1112
The query engine impl now is too messy, you can #1136 . Worse, it can't support physical plan's remote execution, which is necessary for #1112.
In this pr, I refactor it for solving problems mentioned above.
Detailed Changes
physical planandphysical planner's trait definition and impl.physical plan's creation and execution.Test Plan
Test by exist tests.