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https://issues.apache.org/jira/browse/SPARK-45078?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Dongjoon Hyun closed SPARK-45078.
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> The ArrayInsert function should make explicit casting when element type not
> equals derived component type
> ---------------------------------------------------------------------------------------------------------
>
> Key: SPARK-45078
> URL: https://issues.apache.org/jira/browse/SPARK-45078
> Project: Spark
> Issue Type: Bug
> Components: SQL
> Affects Versions: 3.4.1
> Reporter: Ran Tao
> Assignee: Jia Fan
> Priority: Major
> Labels: pull-request-available
> Fix For: 3.4.2, 3.5.1, 4.0.0
>
>
> Generally speaking, array_insert has same insert semantic with
> array_prepend/array_append. however, if we run sql use element cast like
> below, array_prepend/array_append can get right result. but array_insert
> failed.
> {code:java}
> spark-sql (default)> select array_prepend(array(1), cast(2 as tinyint));
> [2,1]
> Time taken: 0.123 seconds, Fetched 1 row(s) {code}
> {code:java}
> spark-sql (default)> select array_append(array(1), cast(2 as tinyint));
> [1,2]
> Time taken: 0.206 seconds, Fetched 1 row(s)
> {code}
> {code:java}
> spark-sql (default)> select array_insert(array(1), 2, cast(2 as tinyint));
> [DATATYPE_MISMATCH.ARRAY_FUNCTION_DIFF_TYPES] Cannot resolve
> "array_insert(array(1), 2, CAST(2 AS TINYINT))" due to data type mismatch:
> Input to `array_insert` should have been "ARRAY" followed by a value with
> same element type, but it's ["ARRAY<INT>", "TINYINT"].; line 1 pos 7;
> 'Project [unresolvedalias(array_insert(array(1), 2, cast(2 as tinyint)),
> None)]
> +- OneRowRelation {code}
> The reported error is clear, however, we may should do explicit casting here.
> because multiset type such as array or map allow the operands of same type
> family to coexist.
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