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https://issues.apache.org/jira/browse/IGNITE-20221?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Ivan Gagarkin resolved IGNITE-20221.
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    Release Note: Duplicates IGNITE-20220
      Resolution: Duplicate

> ignite-spark-ext: 'select weekofyear' returns incorrect week number based on 
> local rules
> ----------------------------------------------------------------------------------------
>
>                 Key: IGNITE-20221
>                 URL: https://issues.apache.org/jira/browse/IGNITE-20221
>             Project: Ignite
>          Issue Type: Bug
>          Components: spark
>            Reporter: Ivan Gagarkin
>            Priority: Major
>
> According to the Spark documentation, the function 
> [weekofyear|https://spark.apache.org/docs/latest/api/sql/#weekofyear] should 
> return a number based on ISO rules:
> {quote}A week is considered to start on a Monday and week 1 is the first week 
> with >3 days.
> {quote}
> The current implementation of the spark-extension uses 
> [WEEK|http://www.h2database.com/html/functions.html#week[],|http://www.h2database.com/html/grammar.html#week_year_field],]
>  which returns the week-based year (locale-specific) from a date/time value.
> The extensions should use 
> [ISO_WEEK|http://www.h2database.com/html/functions.html#iso_week]



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