englefly commented on code in PR #64330:
URL: https://github.com/apache/doris/pull/64330#discussion_r3388345927
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fe/fe-core/src/main/java/org/apache/doris/nereids/rules/rewrite/PullUpProjectExprUnderTopN.java:
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@@ -244,6 +244,13 @@ private static void collectFromNode(Plan node, PullUpInfo
info, Set<ExprId> bloc
for (NamedExpression ne : project.getProjects()) {
if (canPullUp(ne) && !blockedExprIds.contains(ne.getExprId()))
{
info.addPulledUpExpr(project, ne);
+ } else if (ne instanceof Alias && ne.child(0) instanceof Slot)
{
+ // Chain: this intermediate project renames a slot that may
+ // come from a pulled-up expression deeper in the tree.
+ // Register Slot(alias.toSlot()) → child Slot so that
+ // getPullUpReplaceExpression can resolve the chain later.
+ context.pullUpExprReplaceMap.putIfAbsent(ne.toSlot(),
ne.child(0));
+ blockedExprIds.add(((Slot) ne.child(0)).getExprId());
Review Comment:
我不认为这个是问题
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