[ https://issues.apache.org/jira/browse/BEAM-3345?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Anton Kedin reassigned BEAM-3345: --------------------------------- Assignee: (was: Xu Mingmin) > [SQL] Reject Unsupported Joins > ------------------------------ > > Key: BEAM-3345 > URL: https://issues.apache.org/jira/browse/BEAM-3345 > Project: Beam > Issue Type: Bug > Components: dsl-sql > Reporter: Anton Kedin > > Related to https://issues.apache.org/jira/browse/BEAM-3190 . > We don't know what meaningful join semantics is, in presence of multiple > trigger firings. I.e. in accumulating mode it will result in multiple > duplicated join results, and in discarding mode it will only join deltas, > both of these scenarios seem to be super subtle and can lead to > misunderstanding and misuse by the end users. > Until we have a way to implement a correct join semantics (e.g. using > retractions) we should reject unsupported window/trigger combinations. -- This message was sent by Atlassian JIRA (v6.4.14#64029)