zinking commented on a change in pull request #2422:
URL: https://github.com/apache/calcite/pull/2422#discussion_r646241581
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File path: core/src/main/java/org/apache/calcite/sql/SqlOverOperator.java
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@@ -78,6 +78,12 @@ public SqlOverOperator() {
throw validator.newValidationError(aggCall, RESOURCE.overNonAggregate());
}
final SqlNode window = call.operand(1);
+ SqlLiteral qualifier = aggCall.getFunctionQuantifier();
+ if (qualifier != null && qualifier.toString().equals("DISTINCT")
Review comment:
I believe there should be some symbol defined DISTINCT, and if you
reverse the equals operation you could save the `null` comparison
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