morrySnow commented on code in PR #15240:
URL: https://github.com/apache/doris/pull/15240#discussion_r1058913444
##########
fe/fe-core/src/main/java/org/apache/doris/nereids/rules/analysis/BindSlotReference.java:
##########
@@ -373,13 +374,45 @@ private Plan bindSortWithAggregateFunction(
LogicalSort<? extends Plan> sort, Aggregate<? extends Plan>
aggregate, CascadesContext ctx) {
// We should deduplicate the slots, otherwise the binding process will
fail due to the
// ambiguous slots exist.
- Set<Slot> boundSlots = Stream.concat(Stream.of(aggregate),
aggregate.children().stream())
- .flatMap(plan -> plan.getOutput().stream())
- .collect(Collectors.toSet());
+ //Set<Slot> boundSlots = Stream.concat(Stream.of(aggregate),
aggregate.children().stream())
+ // .flatMap(plan -> plan.getOutput().stream())
+ // .collect(Collectors.toSet());
+ //List<OrderKey> sortItemList = sort.getOrderKeys()
+ // .stream()
+ // .map(orderKey -> {
+ // Expression item = new SlotBinder(toScope(new
ArrayList<>(boundSlots)), sort, ctx)
+ // .bind(orderKey.getExpr());
+ // return new OrderKey(item, orderKey.isAsc(),
orderKey.isNullFirst());
+ // }).collect(Collectors.toList());
+ //return new LogicalSort<>(sortItemList, sort.child());
Review Comment:
remove useless comments
##########
fe/fe-core/src/main/java/org/apache/doris/nereids/rules/analysis/BindSlotReference.java:
##########
@@ -373,13 +374,45 @@ private Plan bindSortWithAggregateFunction(
LogicalSort<? extends Plan> sort, Aggregate<? extends Plan>
aggregate, CascadesContext ctx) {
// We should deduplicate the slots, otherwise the binding process will
fail due to the
// ambiguous slots exist.
- Set<Slot> boundSlots = Stream.concat(Stream.of(aggregate),
aggregate.children().stream())
- .flatMap(plan -> plan.getOutput().stream())
- .collect(Collectors.toSet());
+ //Set<Slot> boundSlots = Stream.concat(Stream.of(aggregate),
aggregate.children().stream())
+ // .flatMap(plan -> plan.getOutput().stream())
+ // .collect(Collectors.toSet());
+ //List<OrderKey> sortItemList = sort.getOrderKeys()
+ // .stream()
+ // .map(orderKey -> {
+ // Expression item = new SlotBinder(toScope(new
ArrayList<>(boundSlots)), sort, ctx)
+ // .bind(orderKey.getExpr());
+ // return new OrderKey(item, orderKey.isAsc(),
orderKey.isNullFirst());
+ // }).collect(Collectors.toList());
+ //return new LogicalSort<>(sortItemList, sort.child());
+ //try bound order key with agg output, if failed, try to bound with
output of agg.child
+ //example:
+ // select
+ // col1 * -1 as col1 # inner_col1 * -1 as alias_col1
+ // from
+ // (
+ // select 1 as col1
+ // union
+ // select -2 as col1
+ // ) t
+ // group by col1
+ // order by col1; # order by order_col1
+ // bind order_col1 with alias_col1, then, bind it with inner_col1
+ List<Slot> boundSlots = Lists.newArrayList();
+ Set<String> slotNames = new HashSet<>();
+
+ Stream.concat(Stream.of(aggregate), aggregate.children().stream())
+ .flatMap(plan -> plan.getOutput().stream()).forEach(slot -> {
+ if (!slotNames.contains(slot.getName())) {
+ slotNames.add(slot.getName());
+ boundSlots.add(slot);
+ }
+ });
Review Comment:
we should not rely on the item order in stream api. instead, the better way
is bind two round using difference scopes. the first round use aggregate output
and the second round use aggregate's child if still has unbound slot in
orderkeys
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