vlsi commented on a change in pull request #2623:
URL: https://github.com/apache/calcite/pull/2623#discussion_r761880046
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File path: core/src/main/java/org/apache/calcite/rel/logical/LogicalProject.java
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@@ -35,52 +37,63 @@
import org.apache.calcite.util.Util;
import com.google.common.collect.ImmutableList;
+import com.google.common.collect.ImmutableSet;
import org.checkerframework.checker.nullness.qual.Nullable;
import java.util.List;
+import java.util.Objects;
+import java.util.Set;
/**
* Sub-class of {@link org.apache.calcite.rel.core.Project} not
* targeted at any particular engine or calling convention.
*/
public final class LogicalProject extends Project {
+ private final ImmutableSet<CorrelationId> variablesSet;
Review comment:
Oh, it looks like
https://github.com/apache/calcite/commit/505a9064b96a6c8399735fc2fa4d0ac9d5f3ed87
and https://issues.apache.org/jira/browse/CALCITE-1045 are relevant.
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