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https://issues.apache.org/jira/browse/FLINK-40324?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=18102096#comment-18102096
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Gustavo de Morais commented on FLINK-40324:
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Fixed in 2.3: f5cc2154291366b2ef5238b7020a3a2720f37262
> Append-only should stay unmaterialized without an ON CONFLICT clause
> --------------------------------------------------------------------
>
> Key: FLINK-40324
> URL: https://issues.apache.org/jira/browse/FLINK-40324
> Project: Flink
> Issue Type: Bug
> Components: Table SQL / API
> Affects Versions: 2.3.0
> Reporter: Gustavo de Morais
> Assignee: Gustavo de Morais
> Priority: Major
> Labels: pull-request-available
> Fix For: 2.4.0
>
>
> FLIP-558 dropped the inputInsertOnly guard in apache Flink, so insert-only
> input into a sink with a primary key now gains a SinkUpsertMaterializer and a
> keyed shuffle it never had. Reachable under upsert-materialize=AUTO with
> require-on-conflict=false, and under FORCE regardless. Released in 2.3.0, and
> require-on-conflict is documented as non breaking change which would make
> this a regression.
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