NobiGo commented on code in PR #4226:
URL: https://github.com/apache/calcite/pull/4226#discussion_r1981139451
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core/src/main/java/org/apache/calcite/rel/rules/FilterProjectTransposeRule.java:
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@@ -213,7 +213,8 @@ protected FilterProjectTransposeRule(
public interface Config extends RelRule.Config {
Config DEFAULT = ImmutableFilterProjectTransposeRule.Config.of()
.withOperandFor(Filter.class,
- f -> !RexUtil.containsCorrelation(f.getCondition()),
+ f -> !RexUtil.containsCorrelation(f.getCondition())
+ && !RexUtil.SubQueryFinder.containsSubQuery(f),
Review Comment:
@asolimando @zabetak Based on the above discussion, I have enhanced
RexUtil.containsCorrelation. If the test goes well, I will update the PR again.
Maybe we can only push down the non-correlated sub-queries.
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