RE: Skip partition tuple routing with constant partition key

From: houzj.fnst@fujitsu.com <houzj.fnst@fujitsu.com>
> I think this patch can solve the performance degradation of key expression after
> applying the [Save the last partition] patch.
> Besides, this could be a separate patch which can improve some more cases.
> Thoughts ?

Thank you for proposing an impressive improvement so quickly!  Yes, I'm in the mood for adopting Amit-san's patch as a
basebecause it's compact and readable, and plus add this patch of yours to complement the partition key function case.
 

But ...

* Applying your patch alone produced a compilation error.  I'm sorry I mistakenly deleted the compile log, but it said
somethinglike "There's a redeclaration of PartKeyContext in partcache.h; the original definition is in partdef.h"
 

* Hmm, this may be too much to expect, but I wonder if we can make the patch more compact...


Regards
Takayuki Tsunakawa