[
https://issues.apache.org/jira/browse/FLINK-8325?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16317232#comment-16317232
]
ASF GitHub Bot commented on FLINK-8325:
---------------------------------------
Github user fhueske commented on a diff in the pull request:
https://github.com/apache/flink/pull/5241#discussion_r160267929
--- Diff:
flink-libraries/flink-table/src/main/scala/org/apache/flink/table/plan/nodes/datastream/DataStreamOverAggregate.scala
---
@@ -145,6 +145,14 @@ class DataStreamOverAggregate(
inputSchema.typeInfo,
Some(constants))
+ val constantsTypeInfo =
+
Some(constants).map(_.map(generator.generateExpression(_))).getOrElse(Seq()).map(_.resultType)
+ val aggInputTypeInfo = constantsTypeInfo.++:(inputSchema.fieldTypeInfos)
+
+ val aggregateInputType =
+ cluster.getTypeFactory.asInstanceOf[FlinkTypeFactory]
--- End diff --
Something like:
```
val constantTypes = constants.map(_.getType)
val fieldTypes = input.getRowType.getFieldList.asScala.map(_.getType)
val aggInTypes = constantTypes ++ fieldTypes
val aggInNames = aggInTypes.indices.map("f" + _)
val aggInRowType =
getCluster.getTypeFactory.createStructType(aggInTypes.asJava, aggInNames.asJava)
```
> Add COUNT AGG support constant parameter, i.e. COUNT(*), COUNT(1)
> ------------------------------------------------------------------
>
> Key: FLINK-8325
> URL: https://issues.apache.org/jira/browse/FLINK-8325
> Project: Flink
> Issue Type: Bug
> Components: Table API & SQL
> Affects Versions: 1.5.0
> Reporter: sunjincheng
> Assignee: sunjincheng
>
> COUNT(1) with Group Window, always output 0.
> e.g.
> DATA:
> {code}
> val data = List(
> (1L, 1, "Hi"),
> (2L, 2, "Hello"),
> (4L, 2, "Hello"),
> (8L, 3, "Hello world"),
> (16L, 3, "Hello world"))
> {code}
> SQL:
> {code}
> SELECT b, COUNT(1) FROM MyTable GROUP BY Hop(proctime, interval '0.001'
> SECOND, interval '0.002' SECOND),b
> {code}
> OUTPUT:
> {code}
> 1,0,1,
> 1,0,1,
> 2,0,1,
> 2,0,1,
> 2,0,2,
> 3,0,1,
> 3,0,1
> {code}
--
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