kfaraz commented on a change in pull request #12182:
URL: https://github.com/apache/druid/pull/12182#discussion_r789379331
##########
File path: sql/src/test/java/org/apache/druid/sql/calcite/CalciteQueryTest.java
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@@ -2143,6 +2143,93 @@ public void testHavingOnExactCountDistinct() throws
Exception
);
}
+ @Test
+ public void testExactCountDistinctWithFilter() throws Exception
+ {
+
+ final String sqlQuery = "SELECT COUNT(DISTINCT foo.dim1) FILTER(WHERE
foo.cnt = 1), SUM(foo.cnt) FROM druid.foo";
+ // When useApproximateCountDistinct=true and
useGroupingSetForExactDistinct=false, planning fails due
+ // to a bug in the Calcite's rule (AggregateExpandDistinctAggregatesRule)
+ try {
+ testQuery(
+ PLANNER_CONFIG_NO_HLL, // Enable exact count distinct
Review comment:
Even though it is the default behaviour, I think it would be better to
use `withOverrides` here too for symmetry with the positive test case or if the
default changes later.
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