Rewrite LogicalPlan::head_output_expr to use TreeNode API
#10027
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It turns out this does something more complicated than I realized. Parking for now |
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Which issue does this PR close?
Part of #8913
Rationale for this change
LogicalPlan::head_output_exprhas its own tree traversal routine which is redundant with the TreeNode API added in #8913What changes are included in this PR?
Rewrite
LogicalPlan::head_output_exprto use the tree node APIAre these changes tested?
Existing CI
Are there any user-facing changes?
No