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Posted to issues@spark.apache.org by "Apache Spark (Jira)" <ji...@apache.org> on 2022/08/16 23:27:00 UTC

[jira] [Assigned] (SPARK-40109) New SQL function: get()

     [ https://issues.apache.org/jira/browse/SPARK-40109?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Apache Spark reassigned SPARK-40109:
------------------------------------

    Assignee: Apache Spark  (was: Gengliang Wang)

> New SQL function: get()
> -----------------------
>
>                 Key: SPARK-40109
>                 URL: https://issues.apache.org/jira/browse/SPARK-40109
>             Project: Spark
>          Issue Type: Sub-task
>          Components: SQL
>    Affects Versions: 3.4.0
>            Reporter: Gengliang Wang
>            Assignee: Apache Spark
>            Priority: Major
>
> Currently, when accessing array element with invalid index under ANSI SQL mode, the error is like:
> {quote}[INVALID_ARRAY_INDEX] The index -1 is out of bounds. The array has 3 elements. Use `try_element_at` and increase the array index by 1(the starting array index is 1 for `try_element_at`) to tolerate accessing element at invalid index and return NULL instead. If necessary set "spark.sql.ansi.enabled" to "false" to bypass this error.
> {quote}
> The provided solution is complicated. I suggest introducing a new method get() which always returns null on an invalid array index. This is from [https://docs.snowflake.com/en/sql-reference/functions/get.html.]
> Since Spark's map access always returns null, let's don't support map type in the get method for now.



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