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https://issues.apache.org/jira/browse/FLINK-7206?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16140808#comment-16140808
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ASF GitHub Bot commented on FLINK-7206:
---------------------------------------
Github user fhueske commented on a diff in the pull request:
https://github.com/apache/flink/pull/4355#discussion_r135139164
--- Diff:
flink-libraries/flink-table/src/main/scala/org/apache/flink/table/codegen/AggregationCodeGenerator.scala
---
@@ -356,6 +486,9 @@ class AggregationCodeGenerator(
""".stripMargin
if (needMerge) {
+ if (accConfig != null && accConfig.isStateBackedDataViews) {
+ throw new CodeGenException("DataView doesn't support merge when
the backend uses state.")
--- End diff --
Can we throw this exception earlier (e.g., in `AggregateUtil`) and give
more details about the aggregation function?
> Implementation of DataView to support state access for UDAGG
> ------------------------------------------------------------
>
> Key: FLINK-7206
> URL: https://issues.apache.org/jira/browse/FLINK-7206
> Project: Flink
> Issue Type: Sub-task
> Components: Table API & SQL
> Reporter: Kaibo Zhou
> Assignee: Kaibo Zhou
>
> Implementation of MapView and ListView to support state access for UDAGG.
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