github-actions[bot] commented on code in PR #68579:
URL: https://github.com/apache/doris/pull/68579#discussion_r4226149534


##########
fe/fe-core/src/main/java/org/apache/doris/nereids/trees/expressions/functions/agg/OrthogonalBitmapExprCalculate.java:
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@@ -64,6 +64,14 @@ private 
OrthogonalBitmapExprCalculate(AggregateFunctionParams functionParams) {
         super(functionParams);
     }
 
+    @Override
+    public void checkLegalityBeforeTypeCoercion() {
+        if (!getArgument(2).isConstant()) {
+            throw new AnalysisException("The third argument of " + getName()

Review Comment:
   [P2] Reject a NULL bitmap formula before aggregation. `cast(NULL AS 
varchar)` is a constant and now passes this gate (and the `_count` variant), 
but BE's nullable aggregate wrapper skips every row before `init_add_key` can 
initialize or validate the formula. On a nonempty input, `_count` consequently 
returns 0 and the bitmap variant returns an empty bitmap instead of reporting 
the invalid required formula. Reject a NULL formula in both variants before the 
nullable wrapper can silently convert it into an empty aggregate.



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