zstan commented on code in PR #13389:
URL: https://github.com/apache/ignite/pull/13389#discussion_r4359934733
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modules/calcite/src/main/java/org/apache/ignite/internal/processors/query/calcite/metadata/IgniteMdPercentageOriginalRows.java:
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Review Comment:
done
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modules/calcite/src/main/java/org/apache/ignite/internal/processors/query/calcite/metadata/IgniteMdColumnOrigins.java:
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@@ -303,6 +322,38 @@ private <T> void getOperands(RexNode rn, Class<T> cls,
Set<T> res) {
}
}
+ /**
+ * Provides column origins for a subset.
+ *
+ * <p>Origins are resolved through the original (logical) expression of
the set rather than through the current best
+ * plan: the best expression changes during optimization, and metadata
depending on it makes row count estimates
Review Comment:
done
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