mihaibudiu commented on code in PR #4115:
URL: https://github.com/apache/calcite/pull/4115#discussion_r1898677234
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core/src/test/java/org/apache/calcite/rel/metadata/RelMdUtilTest.java:
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@@ -110,4 +117,39 @@ final RelMetadataFixture sql(String sql) {
});
}
+ /** Test case for
+ * <a
href="https://issues.apache.org/jira/browse/CALCITE-6749";>[CALCITE-6749]
+ * RelMdUtil#setAggChildKeys may return an incorrect result</a>. */
+ @Test void testSetAggChildKeys() {
Review Comment:
Frankly, this is hard to review.
I saw the discussion in the JIRA, but it's not obvious at all that "9" is
the right answer.
I wonder whether having the full plan here would actually be easier - at
least in a comment.
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