vineetgarg02 commented on a change in pull request #1907: [CALCITE-3909]
RelMdMinRowCount doesn't take into account UNION DISTINCT
URL: https://github.com/apache/calcite/pull/1907#discussion_r406970508
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File path: core/src/test/java/org/apache/calcite/test/RelMetadataTest.java
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@@ -614,6 +614,13 @@ private void checkExchangeRowCount(RelNode rel, double
expected, double expected
checkRowCount(sql, EMP_SIZE + DEPT_SIZE, 0D, 140D);
}
+ @Test void testRowCountUnionDistinct() {
+ final String sql = "select x from (values 'a', 'b') as t(x)\n"
Review comment:
`select x from values ('a', 'a') UNION DISTINCT select x from values ('a',
'a')` should produce one row right?
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