xuzifu666 commented on code in PR #5052:
URL: https://github.com/apache/calcite/pull/5052#discussion_r3523962674
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core/src/main/java/org/apache/calcite/sql/validate/SqlValidatorImpl.java:
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@@ -5935,8 +5927,18 @@ private SqlNode rewriteOuterAggregate(SqlNode
originalQuery,
validateQuery(newQuery, parentScope, unknownType);
final SqlNode scalarSubQuery =
SqlStdOperatorTable.SCALAR_QUERY.createCall(newQuery.getParserPosition(),
newQuery);
- return SqlStdOperatorTable.MULTIPLY.createCall(
- aggCall.getParserPosition(), aggCall, scalarSubQuery);
+ // Rewrite to CASE WHEN (SELECT 1 FROM ... LIMIT 1) IS NOT NULL THEN <agg>
END.
+ // This is type-agnostic (unlike multiplication, which only works for
Review Comment:
Sorry for the unnecessary content in this change. I have removed that part.
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