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https://issues.apache.org/jira/browse/SPARK-31474?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Kent Yao updated SPARK-31474:
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Summary: Consistancy between dayofweek/dow in extract expression and
dayofweek function (was: Consistancy betwwen dayofweek/dow in extract
expression and dayofweek function)
> Consistancy between dayofweek/dow in extract expression and dayofweek function
> ------------------------------------------------------------------------------
>
> Key: SPARK-31474
> URL: https://issues.apache.org/jira/browse/SPARK-31474
> Project: Spark
> Issue Type: Improvement
> Components: SQL
> Affects Versions: 3.0.0
> Reporter: Kent Yao
> Priority: Major
>
> {code:sql}
> spark-sql> SELECT extract(dayofweek from '2009-07-26');
> 1
> spark-sql> SELECT extract(dow from '2009-07-26');
> 0
> spark-sql> SELECT extract(isodow from '2009-07-26');
> 7
> spark-sql> SELECT dayofweek('2009-07-26');
> 1
> spark-sql> SELECT weekday('2009-07-26');
> 6
> {code}
> Currently, there are 4 types of day-of-week range:
> the function dayofweek(2.3.0) and extracting dayofweek(2.4.0) result as of
> Sunday(1) to Saturday(7)
> extracting dow(3.0.0) results as of Sunday(0) to Saturday(6)
> extracting isodow (3.0.0) results as of Monday(1) to Sunday(7)
> the function weekday(2.4.0) results as of Monday(0) to Sunday(6)
> Actually, extracting dayofweek and dow are both derived from PostgreSQL but
> have different meanings.
> https://issues.apache.org/jira/browse/SPARK-23903
> https://issues.apache.org/jira/browse/SPARK-28623
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