NobiGo commented on code in PR #4691:
URL: https://github.com/apache/calcite/pull/4691#discussion_r2634384445
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core/src/main/java/org/apache/calcite/sql2rel/RelFieldTrimmer.java:
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@@ -673,7 +673,7 @@ public TrimResult trimFields(
// Build new filter with trimmed input and condition.
relBuilder.push(newInput)
- .filter(filter.getVariablesSet(), newConditionExpr);
+ .filter(correlationIds, newConditionExpr);
Review Comment:
Because during the SqlToRelConverter process, some correlation variables
from subqueries cannot be fully extracted due to scope limitations, I am
considering merging the correlation variables already present in the RelNode
with those newly extracted from subqueries. WDYT？
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