kgyrtkirk commented on code in PR #15045:
URL: https://github.com/apache/druid/pull/15045#discussion_r1339793520
##########
sql/src/main/java/org/apache/druid/sql/calcite/aggregation/builtin/SumSqlAggregator.java:
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@@ -35,11 +36,17 @@
public class SumSqlAggregator extends SimpleSqlAggregator
{
+ /**
+ * Workaround to avoid unconditional rewrite of SUM into COUNT+SUM0.
Review Comment:
I might have been misleading: Druid is able to plan and execute the
rewritten `COUNT` / `SUM0` things; but because `SUM0` is essentially a plain
`SUM` there is no good reason to do that.
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