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https://issues.apache.org/jira/browse/CALCITE-7246?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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ASF GitHub Bot updated CALCITE-7246:
------------------------------------
Labels: pull-request-available (was: )
> UNNEST in spark should convert to EXPLODE/POSEXPLODE
> -----------------------------------------------------
>
> Key: CALCITE-7246
> URL: https://issues.apache.org/jira/browse/CALCITE-7246
> Project: Calcite
> Issue Type: Bug
> Reporter: xiaochen.zhou
> Priority: Minor
> Labels: pull-request-available
> Attachments: image-2025-10-26-01-05-29-569.png,
> image-2025-10-26-01-08-04-245.png, image-2025-10-26-01-08-27-611.png
>
>
> The `{{{}unnest`{}}} function is not supported in Spark. When converting to
> the Spark dialect, it needs to be replaced with the `{{{}explode`{}}} or
> `{{{}posexplode`{}}} function to achieve the same semantics.
>
> [https://spark.apache.org/docs/latest/sql-ref-functions-builtin.html#collection-functions]
> !image-2025-10-26-01-08-04-245.png|width=554,height=84!
> !image-2025-10-26-01-08-27-611.png|width=554,height=79!
> *origin sql:*
> ```sql
> SELECT * FROM UNNEST(ARRAY[1,2,3])
> ```
> *spark dialect should convert to：*
> ```sql
> SELECT * FROM EXPLODE (ARRAY[1,2,3])
> ```
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