Tom Lane wrote:
No, I guess I confused you by talking about the executor representation
at the same time.  This is really unrelated to the executor.  The join
tree I'm thinking of here is the data structure that dangles off
Query.jointree --- it's a representation of the query's FROM clause,
and (at present) can contain RangeTblRef, FromExpr, and JoinExpr nodes.
See the last hundred or so lines of primnodes.h for some details.
The jointree is used by the planner to compute the plan node tree that
the executor will run, but it's not the same thing.

Ah, that helps. Thanks for the explanation. I'll start digging in again...



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