libenchao commented on code in PR #3057:
URL: https://github.com/apache/calcite/pull/3057#discussion_r1113822481
##########
core/src/main/java/org/apache/calcite/rel/rel2sql/SqlImplementor.java:
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@@ -1809,6 +1816,13 @@ private boolean needNewSubQuery(
return true;
}
+ if (rel instanceof Project
+ && clauses.contains(Clause.ORDER_BY)
+ && dialect.getConformance().isSortByOrdinal()) {
+ // Cannot merge a Project that contains sort by ordinal under it.
+ return hasSortByOrdinal();
+ }
Review Comment:
Since we agreed that the slow tests failure is not caused by this PR, we'd
better handle this in CALCITE-5537.
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