Akshat-Jain commented on code in PR #16682:
URL: https://github.com/apache/druid/pull/16682#discussion_r1680956671
##########
extensions-core/datasketches/src/main/java/org/apache/druid/query/aggregation/datasketches/hll/sql/HllSketchBaseSqlAggregator.java:
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@@ -180,6 +183,16 @@ public Aggregation toDruidAggregation(
}
}
+ if (aggregatorFactory == null) {
+ plannerContext.setPlanningError(
+ "Using APPROX_COUNT_DISTINCT() or enabling approximation with
COUNT(DISTINCT) is not supported for"
+ + " %s column. You can disable approximation, use COUNT(DISTINCT %s)
and rerun the query.",
Review Comment:
Done
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