Aaaaaaron commented on a change in pull request #2225:
URL: https://github.com/apache/calcite/pull/2225#discussion_r509842976
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File path:
core/src/main/java/org/apache/calcite/rel/rules/AggregateCaseToFilterRule.java
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@@ -227,8 +227,11 @@ protected AggregateCaseToFilterRule(RelBuilderFactory
relBuilderFactory,
RelCollations.EMPTY, aggregateCall.getType(),
aggregateCall.getName());
} else if (kind == SqlKind.SUM // Case B
- && isIntLiteral(arg1) && RexLiteral.intValue(arg1) == 1
- && isIntLiteral(arg2) && RexLiteral.intValue(arg2) == 0) {
+ && isIntLiteral(arg1)
+ && RexLiteral.intValue(arg1) == 1
Review comment:
> Do we need to check arg1 against null literal to avoid NPE for the
following case?
>
> sum(case when deptno = 40 then null end) as count_d40
There's no NPE, UT is added.
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