Tan Wei comments

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                                            Tan Wei

ImportError: torch.utils.ffi is deprecated. Please use cpp extensions instead.

Try to change the version of pytorch.It may help you. Good luck!

Migrate the `cross join -> inner join optimization` from the planner to the optimizer

hi, @xudong963 I'm interested in trying this, may I try this?

Migrate the `cross join -> inner join optimization` from the planner to the optimizer

sorry, I have been busy with some other stuff these times and forgot it... @sadilet feel free to take it!

Physical plan visitors

When #61 is finished, we can implement a display visitor to display the physical plan.

Refactor expression module structure.

Excited to see it !

Pretty Print Display Logical Plan

Amazing work, let me cc : D

Aggregate Func

We need to output the group by value when doing projection @GanZiheng

Future: MPP!

@ywqzzy hi, very excited to see u interested in it! And maybe u can contact me with WeChat: `tanweime`. For MPP design, this is maybe a big change for current...