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https://issues.apache.org/jira/browse/SPARK-26879?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Takeshi Yamamuro updated SPARK-26879:
-------------------------------------
Affects Version/s: (was: 2.4.0)
3.0.0
> Inconsistency in default column names for functions like inline and stack
> -------------------------------------------------------------------------
>
> Key: SPARK-26879
> URL: https://issues.apache.org/jira/browse/SPARK-26879
> Project: Spark
> Issue Type: Improvement
> Components: SQL
> Affects Versions: 3.0.0
> Reporter: Jash Gala
> Priority: Minor
>
> In the Spark SQL functions definitions, `inline` uses col1, col2, etc. (i.e.
> 1-indexed columns), while `stack` uses col0, col1, col2, etc. (i.e. 0-indexed
> columns).
> {code:title=spark-shell|borderStyle=solid}
> scala> spark.sql("SELECT stack(2, 1, 2, 3)").show
> +----+----+
> |col0|col1|
> +----+----+
> | 1| 2|
> | 3|null|
> +----+----+
> scala> spark.sql("SELECT inline_outer(array(struct(1, 'a'), struct(2,
> 'b')))").show
> +----+----+
> |col1|col2|
> +----+----+
> | 1| a|
> | 2| b|
> +----+----+
> {code}
> This feels like an issue with consistency. As discussed on [PR
> #23748|https://github.com/apache/spark/pull/23748], it might be a good idea
> to standardize this to something specific (like zero-based indexing) for
> these and other similar functions.
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