[HACKERS] How to form a self-defined TupleTableSlot

[Chaoyong.Wang]

Hi, guys.

 

Here is my task situation:

I have a TupleTableSlot, with its own TupleDesc. Now I want to extract
several attributes to form a new TupleTableSlot, how can I define my own
TupleDesc and the ProjectionInfo?

 

Best.