dongjoon-hyun commented on a change in pull request #31476:
URL: https://github.com/apache/spark/pull/31476#discussion_r570574172
##########
File path:
sql/catalyst/src/main/java/org/apache/spark/sql/connector/read/PartitionReader.java
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@@ -48,4 +49,12 @@
* Return the current record. This method should return same value until
`next` is called.
*/
T get();
+
+ /**
+ * Returns an array of custom metrics. By default it returns empty array.
+ */
+ default CustomMetric[] getCustomMetrics() {
Review comment:
Also, can we split this as a trait, too?
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