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Posted to issues@spark.apache.org by "Apache Spark (JIRA)" <ji...@apache.org> on 2019/05/14 10:11:00 UTC
[jira] [Assigned] (SPARK-27701) Extend NestedColumnAliasing to more
nested field cases
[ https://issues.apache.org/jira/browse/SPARK-27701?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Apache Spark reassigned SPARK-27701:
------------------------------------
Assignee: (was: Apache Spark)
> Extend NestedColumnAliasing to more nested field cases
> ------------------------------------------------------
>
> Key: SPARK-27701
> URL: https://issues.apache.org/jira/browse/SPARK-27701
> Project: Spark
> Issue Type: Improvement
> Components: SQL
> Affects Versions: 3.0.0
> Reporter: Liang-Chi Hsieh
> Priority: Major
>
> {{NestedColumnAliasing}} rule covers {{GetStructField}} only, currently. It means that some nested field extraction expressions aren't pruned. For example, if only accessing a nested field in an array of struct, this column isn't pruned. This patch extends the rule to cover such cases.
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