xzj7019 commented on code in PR #39450:
URL: https://github.com/apache/doris/pull/39450#discussion_r1719482908
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fe/fe-core/src/main/java/org/apache/doris/nereids/jobs/executor/Rewriter.java:
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@@ -422,7 +422,10 @@ public class Rewriter extends AbstractBatchJobExecutor {
topic("eliminate",
// SORT_PRUNING should be applied after mergeLimit
custom(RuleType.ELIMINATE_SORT, EliminateSort::new),
- bottomUp(new EliminateEmptyRelation())
+ bottomUp(new EliminateEmptyRelation()),
+ topDown(new PushProjectIntoUnion()),
Review Comment:
why here?
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