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https://issues.apache.org/jira/browse/SPARK-28036?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16873696#comment-16873696
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Shivu Sondur commented on SPARK-28036:
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[~yumwang]
You can close this jira right?.
As it is working in spark.
Only difference is we should use offset without '-' symbol.
> Built-in udf left/right has inconsistent behavior
> -------------------------------------------------
>
> Key: SPARK-28036
> URL: https://issues.apache.org/jira/browse/SPARK-28036
> Project: Spark
> Issue Type: Sub-task
> Components: SQL
> Affects Versions: 3.0.0
> Reporter: Yuming Wang
> Priority: Major
>
> PostgreSQL:
> {code:sql}
> postgres=# select left('ahoj', -2), right('ahoj', -2);
> left | right
> ------+-------
> ah | oj
> (1 row)
> {code}
> Spark SQL:
> {code:sql}
> spark-sql> select left('ahoj', -2), right('ahoj', -2);
> spark-sql>
> {code}
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