[jira] [Commented] (FLINK-27463) The JDBC connector should support option for ‘upsert’ or ‘insert’

["Martijn Visser (Jira)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/FLINK-27463?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17530611#comment-17530611 ] 

Martijn Visser commented on FLINK-27463:
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[~liam8] Thanks for opening this ticket. I don't think we should add this option, we should solve the problem so that when a primary key is set, the correct syntax is used for the specific JDBC dialect.

> The JDBC connector should support option for ‘upsert’ or ‘insert’
> -----------------------------------------------------------------
>
>                 Key: FLINK-27463
>                 URL: https://issues.apache.org/jira/browse/FLINK-27463
>             Project: Flink
>          Issue Type: Improvement
>          Components: Connectors / JDBC
>    Affects Versions: 1.14.4
>            Reporter: Liam
>            Priority: Minor
>
> If set a primary key to the table, then the connector will use the upsert query to sink data.
> However, the upsert query is not always expected. Because some of the databases don't support upsert well, like Click House. (even though some databases are not supporting officially, I believe many users are extending the dialect by themself)
> So I suggest adding an option like 'sink.append-only' to make the data populated by insert query.
>  
> If we can reach a consensus, I can implement it.



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