ILuffZhe commented on code in PR #4088:
URL: https://github.com/apache/calcite/pull/4088#discussion_r1898162782
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core/src/test/java/org/apache/calcite/test/RelMetadataTest.java:
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@@ -1193,6 +1193,27 @@ private void
checkColumnUniquenessForFilterWithConstantColumns(String sql) {
.assertThatUniqueKeysAre(bitSetOf());
}
+ /** Test case for
+ * <a
href="https://issues.apache.org/jira/browse/CALCITE-6727";>[CALCITE-6727]
+ * Column uniqueness constrain should only apply to inner join</a>. */
+ @Test void testColumnUniquenessForLeftJoinOnLimit1() {
+ final String sql = ""
+ + "select A.empno as a_empno,\n"
+ + " A.ename as a_ename,\n"
+ + " B.empno as b_empno,\n"
+ + " B.ename as b_ename\n"
Review Comment:
Sorry for asking this, should `b_empno` be unique if this case is `right
join`?
If yes, do you mind adding a test?
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