NobiGo commented on code in PR #4099:
URL: https://github.com/apache/calcite/pull/4099#discussion_r1891147957
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core/src/main/java/org/apache/calcite/rel/metadata/RelMetadataQuery.java:
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@@ -305,6 +305,26 @@ public static RelMetadataQuery instance() {
}
}
+ /**
+ * Returns whether the return rows of a given relational expression are
empty.
Review Comment:
Let's see if there are any other opinions
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