mchades commented on code in PR #7610:
URL: https://github.com/apache/gravitino/pull/7610#discussion_r2259462593
##########
api/src/main/java/org/apache/gravitino/rel/expressions/NamedReference.java:
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@@ -105,4 +116,46 @@ public String toString() {
return String.join(".", fieldName);
}
}
+
+ /** A {@link NamedReference} that references a metadata field. */
+ final class MetadataField implements NamedReference {
+ /**
+ * The name of the metadata field that contains the partition name. This
is used to reference
+ * the partition name in metadata fields.
+ */
+ public static final String PARTITION_NAME_FIELD = "partition_name";
Review Comment:
suggest using `public static final MetadataField PARTITION_NAME_FIELD =xxx`,
so that users can use it directly
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