julianhyde commented on code in PR #4495:
URL: https://github.com/apache/calcite/pull/4495#discussion_r2264072502
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core/src/main/java/org/apache/calcite/sql/type/ReturnTypes.java:
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@@ -227,7 +227,8 @@ public static SqlCall stripSeparator(SqlCall call) {
@Override public RelDataType
inferReturnType(SqlOperatorBinding opBinding) {
final RelDataType type = super.inferReturnType(opBinding);
- if (opBinding.getGroupCount() == 0 || opBinding.hasFilter()) {
+ if (opBinding.allowChangeNullable()
Review Comment:
The existing `groupCount` attribute is used for this purpose. I think you
can reuse that attribute.
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