[jira] [Commented] (FLINK-6834) Over window doesn't support complex calculation

["sunjincheng (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/FLINK-6834?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16035143#comment-16035143 ] 

sunjincheng commented on FLINK-6834:
------------------------------------

+1 to supported it.

> Over window doesn't support complex calculation
> -----------------------------------------------
>
>                 Key: FLINK-6834
>                 URL: https://issues.apache.org/jira/browse/FLINK-6834
>             Project: Flink
>          Issue Type: Bug
>          Components: Table API & SQL
>            Reporter: Jark Wu
>            Assignee: Jark Wu
>             Fix For: 1.4.0
>
>
> The following example
> {code}
> val windowedTable = table
>       .window(
>         Over partitionBy 'c orderBy 'rowtime preceding UNBOUNDED_ROW as 'w)
>       .select('c, 'b, ('a.count over 'w) + 1)
> {code}
> will throw exception: 
> {code}
> org.apache.flink.table.api.ValidationException: Expression UnresolvedOverCall(count('a),'w) failed on input check: Over window with alias $alias could not be resolved.
> 	at org.apache.flink.table.plan.logical.LogicalNode.failValidation(LogicalNode.scala:143)
> 	at org.apache.flink.table.plan.logical.LogicalNode$$anonfun$validate$1.applyOrElse(LogicalNode.scala:89)
> 	at org.apache.flink.table.plan.logical.LogicalNode$$anonfun$validate$1.applyOrElse(LogicalNode.scala:83)
> 	at org.apache.flink.table.plan.TreeNode.postOrderTransform(TreeNode.scala:72)
> 	at org.apache.flink.table.plan.TreeNode$$anonfun$1.apply(TreeNode.scala:46)
> {code}



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