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https://issues.apache.org/jira/browse/FLINK-1092?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14123479#comment-14123479
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Vasia Kalavri commented on FLINK-1092:
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As I said in dev@, I would like to first understand whether restricting the
operations to join and cogroup is a requirement for some reason (like
disallowing writing invalid constructs) or whether you did not see the use case
for it.
> Allow operations, other than join and cogroup, on the solution set
> ------------------------------------------------------------------
>
> Key: FLINK-1092
> URL: https://issues.apache.org/jira/browse/FLINK-1092
> Project: Flink
> Issue Type: Improvement
> Components: Iterations
> Reporter: Vasia Kalavri
> Priority: Minor
> Labels: feature
>
> Currently, join and cogroup are the only operations allowed on the solution
> set. We should make the solution set usable for any type of operation,
> possibly using special functions.
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