[
https://issues.apache.org/jira/browse/FLINK-6334?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15991552#comment-15991552
]
ASF GitHub Bot commented on FLINK-6334:
---------------------------------------
Github user fhueske commented on a diff in the pull request:
https://github.com/apache/flink/pull/3791#discussion_r114063517
--- Diff:
flink-libraries/flink-table/src/main/scala/org/apache/flink/table/plan/logical/operators.scala
---
@@ -56,6 +57,8 @@ case class Project(projectList: Seq[NamedExpression],
child: LogicalNode) extend
case gcf: GetCompositeField => Alias(gcf,
gcf.aliasName().getOrElse(s"_c$i"))
case other => Alias(other, s"_c$i")
}
+ // This happens when TableFunction.apply returns a Table, ex:
t1.join(split('a) as 'b)
+ case alias: Alias => alias
--- End diff --
Can we merge `Alias` before into the `LogicalTableFunctionCall` (maybe in
`table.join()`?
We should add as few special cases in the validation as possible, IMO.
> Refactoring UDTF interface
> --------------------------
>
> Key: FLINK-6334
> URL: https://issues.apache.org/jira/browse/FLINK-6334
> Project: Flink
> Issue Type: Improvement
> Components: Table API & SQL
> Reporter: Ruidong Li
> Assignee: Ruidong Li
>
> The current UDTF leverages the table.join(expression) interface, which is not
> a proper interface in terms of semantics. We would like to refactor this to
> let UDTF use table.join(table) interface. Very briefly, UDTF's apply method
> will return a Table Type, so Join(UDTF('a, 'b, ...) as 'c) shall be viewed as
> join(Table)
--
This message was sent by Atlassian JIRA
(v6.3.15#6346)
