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https://issues.apache.org/jira/browse/SPARK-32683?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Daeho Ro updated SPARK-32683:
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Attachment: comment.png
> Datetime Pattern F not working as expected
> ------------------------------------------
>
> Key: SPARK-32683
> URL: https://issues.apache.org/jira/browse/SPARK-32683
> Project: Spark
> Issue Type: Bug
> Components: Spark Core
> Affects Versions: 3.0.0
> Environment: Windows 10 Pro with Jupyter Lab Docker Image for the
> spark 3.0.0 and python 3.8.5.
> REPOSITORY : jupyter/all-spark-notebook
> TAG: f1811928b3dd
> Reporter: Daeho Ro
> Priority: Major
> Attachments: comment.png
>
>
> From the docs, the pattern F should give a week of the month.
> |*Symbol*|*Meaning*|*Presentation*|*Example*|
> |F|week-of-month|number(1)|3|
> I have tested in the scala spark 3.0.0 and pyspark 3.0.0:
> {code:java}
> from pyspark.sql.functions import *df.withColumn('date', to_timestamp('date',
> 'yyyy-MM-dd')) \
> .withColumn('month', month('date')) \
> .withColumn('week', date_format('date', 'F')) \
> .show(10, False)
> +-------------------+-----+----+
> |date |month|week|
> +-------------------+-----+----+
> |2020-08-01 00:00:00|8 |1 |
> |2020-08-02 00:00:00|8 |2 |
> |2020-08-03 00:00:00|8 |3 |
> |2020-08-04 00:00:00|8 |4 |
> |2020-08-05 00:00:00|8 |5 |
> |2020-08-06 00:00:00|8 |6 |
> |2020-08-07 00:00:00|8 |7 |
> |2020-08-08 00:00:00|8 |1 |
> |2020-08-09 00:00:00|8 |2 |
> |2020-08-10 00:00:00|8 |3 |
> +-------------------+-----+----+ {code}
> The `week` column is not the week of the month. It is a day of the week as a
> number.
>
> From my calendar, the first day of August should have 1 for the week-of-month
> and from 2nd to 8th should have 2 and so on.
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