Enrico Minack created SPARK-36319:
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Summary: 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
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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