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https://issues.apache.org/jira/browse/SPARK-36319?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17388269#comment-17388269
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Apache Spark commented on SPARK-36319:
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User 'EnricoMi' has created a pull request for this issue:
https://github.com/apache/spark/pull/33545
> Have Observation return Map instead of Row
> ------------------------------------------
>
> Key: SPARK-36319
> URL: https://issues.apache.org/jira/browse/SPARK-36319
> Project: Spark
> Issue Type: Improvement
> Components: Java API, PySpark, SQL
> Affects Versions: 3.3.0
> Reporter: Enrico Minack
> Priority: Major
>
> As [~gurwls223] pointed out, the {{Observation}} API (Scala, Java, PySpark)
> could return a {{Map}} / {{Dict}}. It currently returns {{Row}} simply
> because the metrics are (internal to {{Observation}}) retrieved from the
> listener as rows. Since that is hidden from the user by the {{Observation}}
> API, there is no need to return {{Row}}.
> If there is some value in the original {{Row}}, both could be provided via
> {{getAsRow}} and {{getAsMap}}.
> The {{Observation}} API has been added to Spark in unreleased 3.3.0, so it
> should not be a blocker to remove the {{Row}} return type in 3.3.0 again.
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