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https://issues.apache.org/jira/browse/FLINK-8518?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16475704#comment-16475704
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ASF GitHub Bot commented on FLINK-8518:
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Github user snuyanzin commented on the issue:
https://github.com/apache/flink/pull/6007
@walterddr thank you for your comment
it is just DOW implementation because to implement EPOCH we have to wait
for CALCITE-2303 resolution
about DECADE - there are 2 ways: one is also to wait for CALCITE-2303
another one is to do the same changes in
_org.apache.calcite.avatica.util.DateTimeUtils#julianExtract_ (Flink has its
own version of this class) as proposed in CALCITE-2303 and then do other stuff
in Flink
> Support DOW, EPOCH, DECADE for EXTRACT
> --------------------------------------
>
> Key: FLINK-8518
> URL: https://issues.apache.org/jira/browse/FLINK-8518
> Project: Flink
> Issue Type: Improvement
> Components: Table API & SQL
> Reporter: Timo Walther
> Assignee: Sergey Nuyanzin
> Priority: Major
>
> We upgraded Calcite to version 1.15 in FLINK-7934. The EXTRACT method
> supports more conversion targets. The targets DOW, EPOCH, DECADE should be
> implemented and tested for different datatypes.
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