Eric Ridge wrote:
> Is the tuplestore basically just an array of ItemPointer-s? In mean,
> it's not a copy of each entire row, is it?
Yup, it is copied:
src/backend/utils/sort/tuplestore.c:tuplestore_puttuple()
8<--------------------------------------------------------
/*
* Accept one tuple and append it to the tuplestore.
*
* Note that the input tuple is always copied; the caller need not save
* it.
8<--------------------------------------------------------
Joe
