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https://issues.apache.org/jira/browse/CALCITE-5830?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17753726#comment-17753726
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Ran Tao commented on CALCITE-5830:
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[~jiajunbernoulli] ARRAY_INSERT is from spark 3.4.0 it has been covered 2
released versions. i think it's stable. and i get your point. however i think
spark is right. because it defines "Index above array size appends the array,
or prepends the array if index is negative, with `NULL` elements."
and spark index begins -1 and 1, so 'z' is -1, the original 'c' should move to
the next.
// actual spark result
SELECT array_insert(array('a', 'b', 'c'), -1, 'z');
["a","b","z","c"]
> Add ARRAY_INSERT function(enabled in Spark library)
> ---------------------------------------------------
>
> Key: CALCITE-5830
> URL: https://issues.apache.org/jira/browse/CALCITE-5830
> Project: Calcite
> Issue Type: New Feature
> Components: core
> Affects Versions: 1.34.0
> Reporter: Ran Tao
> Assignee: Ran Tao
> Priority: Major
> Labels: pull-request-available
>
> array_insert(x, pos, val) - Places val into index pos of array x. Array
> indices start at 1, or start from the end if index is negative. Index above
> array size appends the array, or prepends the array if index is negative,
> with 'null' elements
> *Examples:*
> > SELECT array_insert(array(1, 2, 3, 4), 5, 5); [1,2,3,4,5]
> > SELECT array_insert(array(5, 3, 2, 1), -3, 4); [5,4,3,2,1]
> https://spark.apache.org/docs/latest/api/sql/index.html#array_insert
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