jamesstarr commented on a change in pull request #2378:
URL: https://github.com/apache/calcite/pull/2378#discussion_r742494848
##########
File path:
core/src/main/java/org/apache/calcite/rel/metadata/RelMetadataQueryBase.java
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@@ -62,49 +62,56 @@
* </ol>
*/
public class RelMetadataQueryBase {
+
//~ Instance fields --------------------------------------------------------
/** Set of active metadata queries, and cache of previous results. */
- public final Table<RelNode, Object, Object> map = HashBasedTable.create();
+ @Deprecated // to be removed before 2.0
+ public final Table<RelNode, Object, Object> map;
- public final @Nullable JaninoRelMetadataProvider metadataProvider;
+ @API(status = API.Status.INTERNAL)
+ public final MetadataCache cache;
+ protected final MetadataHandlerProvider metadataHandlerProvider;
+
+ @Deprecated // to be removed before 2.0
+ public final @Nullable JaninoRelMetadataProvider metadataProvider =
THREAD_PROVIDERS.get();
//~ Static fields/initializers ---------------------------------------------
+ @Deprecated // to be removed before 2.0
public static final ThreadLocal<@Nullable JaninoRelMetadataProvider>
THREAD_PROVIDERS =
new ThreadLocal<>();
- //~ Constructors -----------------------------------------------------------
-
Review comment:
I am doubtful any one inherited directly from RelMetadataQueryBase.
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