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https://issues.apache.org/jira/browse/SPARK-37348?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Ruifeng Zheng resolved SPARK-37348.
-----------------------------------
Fix Version/s: 3.4.0
Resolution: Fixed
Issue resolved by pull request 37449
[https://github.com/apache/spark/pull/37449]
> PySpark pmod function
> ---------------------
>
> Key: SPARK-37348
> URL: https://issues.apache.org/jira/browse/SPARK-37348
> Project: Spark
> Issue Type: Improvement
> Components: PySpark
> Affects Versions: 3.2.0
> Reporter: Tim Schwab
> Assignee: Ruifeng Zheng
> Priority: Minor
> Fix For: 3.4.0
>
>
> Because Spark is built on the JVM, in PySpark, F.lit(-1) % F.lit(2) returns
> -1. However, the modulus is often desired instead of the remainder.
>
> There is a [PMOD() function in Spark
> SQL|https://spark.apache.org/docs/latest/api/sql/#pmod], but [not in
> PySpark|https://spark.apache.org/docs/latest/api/python/reference/pyspark.sql.html#functions].
> So at the moment, the two options for getting the modulus is to use
> F.expr("pmod(A, B)"), or create a helper function such as:
>
> {code:java}
> def pmod(dividend, divisor):
> return F.when(dividend < 0, (dividend % divisor) +
> divisor).otherwise(dividend % divisor){code}
>
>
> Neither are optimal - pmod should be native to PySpark as it is in Spark SQL.
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