[SPARK-35230][SQL] Move custom metric classes to proper package #32348
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What changes were proposed in this pull request?
This patch moves DS v2 custom metric classes to
org.apache.spark.sql.connector.metricpackage. MovingCustomAvgMetricandCustomSumMetricto above package and make them as public java abstract class too.Why are the changes needed?
CustomAvgMetricandCustomSumMetricshould be public APIs for developers to extend. As there are a few metric classes, we should put them together in one package.Does this PR introduce any user-facing change?
No, dev only and they are not released yet.
How was this patch tested?
Unit tests.