julianhyde commented on code in PR #3837:
URL: https://github.com/apache/calcite/pull/3837#discussion_r1667091232
##########
core/src/main/java/org/apache/calcite/rel/metadata/BuiltInMetadata.java:
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@@ -837,7 +840,59 @@ interface Handler extends MetadataHandler<Memory> {
@Override default MetadataDef<Memory> getDef() {
return DEF;
}
+ }
+ }
+
+ /** Metadata about whether a column is a measure and, if so, what is the
+ * expression to evaluate that measure in the current context. */
+ public interface Measure extends Metadata {
+ MetadataDef<Measure> DEF =
+ MetadataDef.of(Measure.class, Measure.Handler.class,
+ BuiltInMethod.MEASURE_EXPAND.method,
+ BuiltInMethod.IS_MEASURE.method);
+
+ /** Returns whether a given column is a measure. */
Review Comment:
Added javadoc
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