[
https://issues.apache.org/jira/browse/SPARK-40033?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17577842#comment-17577842
]
Apache Spark commented on SPARK-40033:
--------------------------------------
User 'ulysses-you' has created a pull request for this issue:
https://github.com/apache/spark/pull/37463
> Nested schema pruning support through element_at
> ------------------------------------------------
>
> Key: SPARK-40033
> URL: https://issues.apache.org/jira/browse/SPARK-40033
> Project: Spark
> Issue Type: Improvement
> Components: SQL
> Affects Versions: 3.4.0
> Reporter: XiDuo You
> Priority: Major
>
> The semantics of element_at is similar with GetArrayItem and GetMapValue, so
> we can support do nested schema pruning if the inside data type is struct.
> For example:
> For a column schema: `c: array<struct<s1: int, s2: string>>`
> With the query: `SELECT element_at(c, 1).s1`
> The final pruned schema should be `c: array<struct<s1: int>>`
--
This message was sent by Atlassian Jira
(v8.20.10#820010)
---------------------------------------------------------------------
To unsubscribe, e-mail: issues-unsubscr...@spark.apache.org
For additional commands, e-mail: issues-h...@spark.apache.org
