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https://issues.apache.org/jira/browse/FLINK-9713?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16614727#comment-16614727
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ASF GitHub Bot commented on FLINK-9713:
---------------------------------------
twalthr commented on a change in pull request #6299: [FLINK-9713][table][sql]
Support processing time versioned joins
URL: https://github.com/apache/flink/pull/6299#discussion_r217638668
##########
File path:
flink-libraries/flink-table/src/main/scala/org/apache/flink/table/expressions/fieldExpression.scala
##########
@@ -139,6 +139,23 @@ case class WindowReference(name: String, tpe:
Option[TypeInformation[_]] = None)
override def toString: String = s"'$name"
}
+case class TemporalTableReference(name: String, typeInformation:
TypeInformation[_])
Review comment:
Why do we need this class? Window references and table references are
necessary to call `window.rowtime` (extract the rowtime out of a window) or
`table.in(1, 2, 3)` but when do we need to references the temporal table?
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> Support versioned joins in planning phase
> -----------------------------------------
>
> Key: FLINK-9713
> URL: https://issues.apache.org/jira/browse/FLINK-9713
> Project: Flink
> Issue Type: Sub-task
> Components: Table API & SQL
> Affects Versions: 1.5.0
> Reporter: Piotr Nowojski
> Assignee: Piotr Nowojski
> Priority: Major
> Labels: pull-request-available
>
> Queries like:
> {code:java}
> SELECT
> o.amount * r.rate
> FROM
> Orders AS o,
> LATERAL TABLE (Rates(o.rowtime)) AS r
> WHERE o.currency = r.currency{code}
> should evaluate to valid plan with versioned joins plan node.
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