jacques-n commented on a change in pull request #2653:
URL: https://github.com/apache/calcite/pull/2653#discussion_r775619205
##########
File path: core/src/test/java/org/apache/calcite/test/RelMetadataTest.java
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@@ -3686,4 +4157,71 @@ Sql assertRowsUnique(boolean[] ignoreNulls,
Matcher<Boolean> matcher,
}
}
+
+ /**
+ * A configuration that describes how metadata should be configured.
+ */
+ public static class MetadataConfig {
+
+ private final String name;
+ private final Function<RelMetadataProvider, MetadataHandlerProvider>
converter;
+ private final Supplier<RelMetadataProvider> defaultProviderSupplier;
+ private final boolean isCaching;
Review comment:
I've just added a test to verify no cycles in both impls.
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