zzwqqq commented on code in PR #5350:
URL: https://github.com/apache/calcite/pull/5350#discussion_r4345678785
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core/src/main/java/org/apache/calcite/sql2rel/SqlToRelConverter.java:
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@@ -301,6 +301,12 @@ public class SqlToRelConverter {
private final Map<CorrelationId, DeferredLookup> mapCorrelToDeferred =
new HashMap<>();
+ /**
+ * Maps an inner join whose ON condition has expanded sub-queries to the
+ * cross join of its inputs.
+ */
+ private final Map<RelNode, RelNode> mapJoinToCrossJoin = new HashMap<>();
Review Comment:
Could we derive the field offsets from the scope's namespaces, as
getCorrelationUse does, instead of adding mapJoinToCrossJoin?
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