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https://issues.apache.org/jira/browse/FLINK-6462?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16011298#comment-16011298
]
ASF GitHub Bot commented on FLINK-6462:
---------------------------------------
Github user fhueske commented on a diff in the pull request:
https://github.com/apache/flink/pull/3851#discussion_r116595446
--- Diff:
flink-libraries/flink-table/src/test/scala/org/apache/flink/table/api/scala/batch/table/validation/AggregationsValidationTest.scala
---
@@ -20,13 +20,25 @@ package
org.apache.flink.table.api.scala.batch.table.validation
import org.apache.flink.api.scala._
import org.apache.flink.api.scala.util.CollectionDataSets
-import
org.apache.flink.table.api.java.utils.UserDefinedAggFunctions.WeightedAvgWithMergeAndReset
+import
org.apache.flink.table.api.java.utils.UserDefinedAggFunctions.{OverAgg0,
WeightedAvgWithMergeAndReset}
import org.apache.flink.table.api.scala._
import org.apache.flink.table.api.{TableEnvironment, ValidationException}
import org.junit._
class AggregationsValidationTest {
+ /**
+ * OVER clause is necessary for [[OverAgg0]] window function.
+ */
+ @Test(expected = classOf[ValidationException])
+ def testOverAggregation(): Unit = {
+ val env= ExecutionEnvironment.getExecutionEnvironment
--- End diff --
+space `val env = ExecutionEnvironment...`
> Add requiresOver interface for AggregateFunction
> -------------------------------------------------
>
> Key: FLINK-6462
> URL: https://issues.apache.org/jira/browse/FLINK-6462
> Project: Flink
> Issue Type: Improvement
> Components: Table API & SQL
> Reporter: sunjincheng
> Assignee: sunjincheng
> Fix For: 1.3.0
>
>
> The window function in the standard database only supports the "over" window,
> such as `LAG`,` LEAD`, `FIRST_VALUE`,` LAST_VALUE`. These window functions do
> not apply to `Slide`,` Tumble`, `Session` window. So when the user-defined
> AGG need to be clearly defined. In calcite `SqlAggFunction` will using
> `requiresOver` to distinguish.
> In this JIRA. will deal with this feature.
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