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https://issues.apache.org/jira/browse/SPARK-28036?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16872045#comment-16872045
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Shivu Sondur edited comment on SPARK-28036 at 6/25/19 8:30 AM:
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[~yumwang]
select left('ahoj', 2), right('ahoj', 2);
use without '-' sign, it will work fine,
i tested in latest spark
was (Author: [email protected]):
[~yumwang]
select left('ahoj', 2), right('ahoj', 2);
use with '-' sign, it will work fine,
i tested in latest spark
> 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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