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https://issues.apache.org/jira/browse/CALCITE-5701?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17723243#comment-17723243
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Julian Hyde commented on CALCITE-5701:
--------------------------------------
I saw you added a 'Spark' label. This might make people think that it relates
to the Spark adapter, which it does not. If you want to make this issue clear
and searchable, use the same summary format as other similar issues such as
CALCITE-5657, 'Add NAMED_STRUCT function (enabled in Spark library)'.
> Implement Apache Spark named_struct
> -----------------------------------
>
> Key: CALCITE-5701
> URL: https://issues.apache.org/jira/browse/CALCITE-5701
> Project: Calcite
> Issue Type: New Feature
> Components: core
> Reporter: Guillaume Massé
> Priority: Minor
> Labels: Spark
>
> [https://spark.apache.org/docs/3.4.0/api/sql/index.html#named_struct]
>
> {code:java}
> spark.sql("""select named_struct("a", 1, "b", 2)""")
> res4: org.apache.spark.sql.DataFrame = [named_struct(a, 1, b, 2): struct<a:
> int, b: int>]
> Calcite:
> SELECT named_struct("a", 1, "b", 2);
> type: row(a int not null, b int not null){code}
>
> It's also possible to be nested:
> {code:java}
> spark.sql("""select named_struct("a", 1, "b", named_struct("c", 2))""")
> res5: org.apache.spark.sql.DataFrame = [named_struct(a, 1, b, named_struct(c,
> 2)): struct<a: int, b: struct<c: int>>] {code}
> {code:java}
> Calcite:
> SELECT named_struct("a", 1, "b", named_struct("c", 2));
> type: row(a int not null, b row(c int not null) not null){code}
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