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From "Jark Wu (JIRA)" <j...@apache.org>
Subject [jira] [Created] (FLINK-6834) Over window doesn't support complex calculation
Date Fri, 02 Jun 2017 13:55:04 GMT
Jark Wu created FLINK-6834:

             Summary: 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
val windowedTable = table
        Over partitionBy 'c orderBy 'rowtime preceding UNBOUNDED_ROW as 'w)
      .select('c, 'b, ('a.count over 'w) + 1)

will throw exception: 
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)

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