Daeho Ro created SPARK-32683:
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Summary: Datetime Pattern F works wrongly.
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
>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.
!image-2020-08-21-21-31-32-297.png!
>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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