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https://issues.apache.org/jira/browse/FLINK-9432?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16592864#comment-16592864
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ASF GitHub Bot commented on FLINK-9432:
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snuyanzin opened a new pull request #6614: [FLINK-9432] Support extract
timeunit: DECADE, EPOCH, ISODOW, ISOYEAR…
URL: https://github.com/apache/flink/pull/6614
## What is the purpose of the change
The PR provides implementation of `extract` function for timeunits:
`decade`, `epoch`, `isodow`, `isoyear`, 'millisecond`,`microsecond`
## Brief change log
- support timeunits `extract`
- documentation updates (mention all possible timeunits for `extract`)
- tests
## Verifying this change
- *Added tests validates the result of `extract` call*
- *Added tests validates that `extract` of `isodow`, `isodoy`, `epoch`,
`decade` for time is incorrect*
## Does this pull request potentially affect one of the following parts:
- Dependencies (does it add or upgrade a dependency): (no)
- The public API, i.e., is any changed class annotated with
`@Public(Evolving)`: (no)
- The serializers: (no)
- The runtime per-record code paths (performance sensitive): (no)
- Anything that affects deployment or recovery: JobManager (and its
components), Checkpointing, Yarn/Mesos, ZooKeeper: (no)
- The S3 file system connector: (no)
## Documentation
- Does this pull request introduce a new feature? (yes)
- If yes, how is the feature documented? (docs)
functions.md updated
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> Support extract epoch, decade, millisecond, microsecond
> -------------------------------------------------------
>
> Key: FLINK-9432
> URL: https://issues.apache.org/jira/browse/FLINK-9432
> Project: Flink
> Issue Type: New Feature
> Reporter: Sergey Nuyanzin
> Assignee: Sergey Nuyanzin
> Priority: Major
> Labels: pull-request-available
>
> The task is to separate activity from depending on
> https://issues.apache.org/jira/browse/CALCITE-2303 from all others that could
> be done without upgrade avatica/calcite in
> https://issues.apache.org/jira/browse/FLINK-8518
> Now the implementations of next functions are blocked
> {code:sql}
> extract(decade from ...)
> extract(epoch from ...)
> extract(millisecond from ...)
> extract(microsecond from ...)
> extract(isodow from ...)
> extract(isoyear from ...)
> {code}
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