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https://issues.apache.org/jira/browse/SPARK-37047?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17430140#comment-17430140
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Apache Spark commented on SPARK-37047:
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User 'mkaravel' has created a pull request for this issue:
https://github.com/apache/spark/pull/34154
> Add overloads for lpad and rpad for BINARY strings
> --------------------------------------------------
>
> Key: SPARK-37047
> URL: https://issues.apache.org/jira/browse/SPARK-37047
> Project: Spark
> Issue Type: New Feature
> Components: SQL
> Affects Versions: 3.3.0
> Reporter: Menelaos Karavelas
> Priority: Major
>
> Currently, `lpad` and `rpad` accept BINARY strings as input (both in terms of
> input string to be padded and padding pattern), and these strings get cast to
> UTF8 strings. The result of the operation is a UTF8 string which may be
> invalid as it can contain non-UTF8 characters.
> What we would like to do is to overload `lpad` and `rpad` to accept BINARY
> strings as inputs (both for the string to be padded and the padding pattern)
> and produce a left or right padded BINARY string as output.
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