yanlin-Lynn commented on a change in pull request #1451: [CALCITE-3334]
Refinement for Substitution-Based MV Matching
URL: https://github.com/apache/calcite/pull/1451#discussion_r324966619
##########
File path: core/src/main/java/org/apache/calcite/plan/SubstitutionVisitor.java
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@@ -1223,6 +1258,517 @@ public UnifyResult apply(UnifyRuleCall call) {
}
}
+ /**
+ * A {@link SubstitutionVisitor.UnifyRule} that matches a
+ * {@link MutableScan} to a {@link MutableCalc} which has a {@link
MutableScan} child.
+ */
+ private static class ScanToCalcUnifyRule extends AbstractUnifyRule {
+
+ public static final ScanToCalcUnifyRule INSTANCE = new
ScanToCalcUnifyRule();
+
+ private ScanToCalcUnifyRule() {
+ super(
+ any(MutableScan.class),
+ operand(MutableCalc.class,
+ any(MutableScan.class)),
+ 0);
Review comment:
intent problem here.
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