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https://issues.apache.org/jira/browse/FLINK-4691?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15551341#comment-15551341
]
ASF GitHub Bot commented on FLINK-4691:
---------------------------------------
Github user twalthr commented on a diff in the pull request:
https://github.com/apache/flink/pull/2562#discussion_r82141352
--- Diff:
flink-libraries/flink-table/src/main/scala/org/apache/flink/api/table/plan/logical/operators.scala
---
@@ -55,28 +56,27 @@ case class Project(projectList: Seq[NamedExpression],
child: LogicalNode) extend
override def validate(tableEnv: TableEnvironment): LogicalNode = {
val resolvedProject = super.validate(tableEnv).asInstanceOf[Project]
+ val names: mutable.Set[String] = mutable.Set()
- def checkUniqueNames(exprs: Seq[Expression]): Unit = {
- val names: mutable.Set[String] = mutable.Set()
- exprs.foreach {
- case n: Alias =>
- // explicit name
- if (names.contains(n.name)) {
- throw ValidationException(s"Duplicate field name ${n.name}.")
- } else {
- names.add(n.name)
- }
- case r: ResolvedFieldReference =>
- // simple field forwarding
- if (names.contains(r.name)) {
- throw ValidationException(s"Duplicate field name ${r.name}.")
- } else {
- names.add(r.name)
- }
- case _ => // Do nothing
+ def checkName(name: String): Unit = {
+ if (names.contains(name)) {
+ throw ValidationException(s"Duplicate field name $name.")
--- End diff --
Done.
> Add group-windows for streaming tables
> ---------------------------------------
>
> Key: FLINK-4691
> URL: https://issues.apache.org/jira/browse/FLINK-4691
> Project: Flink
> Issue Type: Sub-task
> Components: Table API & SQL
> Reporter: Timo Walther
> Assignee: Timo Walther
>
> Add Tumble, Slide, Session group-windows for streaming tables as described in
> [FLIP-11|https://cwiki.apache.org/confluence/display/FLINK/FLIP-11%3A+Table+API+Stream+Aggregations].
>
> Implementation of group-windows on streaming tables. This includes
> implementing the API of group-windows, the logical validation for
> group-windows, and the definition of the “rowtime” and “systemtime” keywords.
> Group-windows on batch tables won’t be initially supported and will throw an
> exception.
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