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https://issues.apache.org/jira/browse/FLINK-9432?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16627311#comment-16627311
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ASF GitHub Bot commented on FLINK-9432:
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pnowojski commented on a change in pull request #6614: [FLINK-9432] [table]
Support extract timeunit: DECADE, EPOCH, ISODOW, ISOYEAR…
URL: https://github.com/apache/flink/pull/6614#discussion_r220168491
##########
File path:
flink-libraries/flink-table/src/test/scala/org/apache/flink/table/expressions/ScalarFunctionsTest.scala
##########
@@ -1852,6 +1852,42 @@ class ScalarFunctionsTest extends ScalarTypesTestBase {
"EXTRACT(DOY FROM f16)",
"315")
+ testSqlApi(
+ "EXTRACT(EPOCH FROM f18)",
+ "847608883")
Review comment:
Why does the PostgreSQL (which seems to be the only major DB that supports
EPOCHs?) returns different results here? The results are 10 seconds of, which
seems disturbing.
http://sqlfiddle.com/#!17/9eecb/21451
It might have something to do with leap seconds...
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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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