danny0405 commented on a change in pull request #2126:
URL: https://github.com/apache/calcite/pull/2126#discussion_r481000660
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File path:
core/src/main/java/org/apache/calcite/rel/metadata/RelMdUniqueKeys.java
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@@ -256,6 +259,35 @@ private RelMdUniqueKeys() {}
return ImmutableSet.of();
}
+ /**
+ * Any unique key of any input of Intersect is a unique key of the Intersect.
+ */
Review comment:
`is a` => `is an`
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