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Diffstat (limited to 'src/backend/optimizer/plan/createplan.c')
| -rw-r--r-- | src/backend/optimizer/plan/createplan.c | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/src/backend/optimizer/plan/createplan.c b/src/backend/optimizer/plan/createplan.c index 93c56c657ce..979c3c212fd 100644 --- a/src/backend/optimizer/plan/createplan.c +++ b/src/backend/optimizer/plan/createplan.c @@ -1134,10 +1134,10 @@ create_append_plan(PlannerInfo *root, AppendPath *best_path) } /* - * XXX ideally, if there's just one child, we'd not bother to generate an - * Append node but just return the single child. At the moment this does - * not work because the varno of the child scan plan won't match the - * parent-rel Vars it'll be asked to emit. + * And build the Append plan. Note that if there's just one child, the + * Append is pretty useless; but we wait till setrefs.c to get rid of it. + * Doing so here doesn't work because the varno of the child scan plan + * won't match the parent-rel Vars it'll be asked to emit. */ plan = make_append(subplans, best_path->first_partial_path, |