Akshat-Jain commented on code in PR #16682:
URL: https://github.com/apache/druid/pull/16682#discussion_r1668631373
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extensions-core/datasketches/src/test/java/org/apache/druid/query/aggregation/datasketches/hll/sql/HllSketchSqlAggregatorTest.java:
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@@ -508,6 +524,33 @@ public void testApproxCountDistinctHllSketchIsRounded()
);
}
+ @Test
+ public void testApproxCountDistinctOnUnsupportedComplexColumn()
+ {
+ try {
+ testQuery("SELECT COUNT(distinct double_first_added) FROM
druid.wikipedia_first_last", ImmutableList.of(), ImmutableList.of());
+ Assert.fail("query planning should fail");
+ }
+ catch (DruidException e) {
+ Assert.assertEquals("Query could not be planned. A possible reason is
[Using APPROX_COUNT_DISTINCT() or enabling approximation "
Review Comment:
Yep
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