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https://issues.apache.org/jira/browse/FLINK-7014?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16065865#comment-16065865
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ASF GitHub Bot commented on FLINK-7014:
---------------------------------------
Github user wuchong commented on a diff in the pull request:
https://github.com/apache/flink/pull/4200#discussion_r124443845
--- Diff:
flink-libraries/flink-table/src/main/scala/org/apache/flink/table/functions/utils/AggSqlFunction.scala
---
@@ -57,6 +57,8 @@ class AggSqlFunction(
) {
def getFunction: AggregateFunction[_, _] = aggregateFunction
+
+ override def isDeterministic: Boolean = aggregateFunction.isDeterministic
--- End diff --
`isDeterministic` is the base method of `SqlOperator` which is the base
class of `AggSqlFunction`, `ScalarSqlFunction`, `TableSqlFunction`. So I think
maybe it's not necessary to add an abstract class.
> Expose isDeterministic interface to ScalarFunction and TableFunction
> --------------------------------------------------------------------
>
> Key: FLINK-7014
> URL: https://issues.apache.org/jira/browse/FLINK-7014
> Project: Flink
> Issue Type: Improvement
> Components: Table API & SQL
> Reporter: Ruidong Li
> Assignee: Ruidong Li
>
> Currently, the `isDeterministic` method of implementations of `SqlFuntion`
> are always returning true, which cause inappropriate optimization in Calcite,
> such as taking user's stateful UDF as a pure functional procedure.
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