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https://issues.apache.org/jira/browse/FLINK-34901?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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ouyangwulin updated FLINK-34901:
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Summary: Update clause must EXCLUDED unique index (was: Improve the
performance of the update Postgres database)
> Update clause must EXCLUDED unique index
> ----------------------------------------
>
> Key: FLINK-34901
> URL: https://issues.apache.org/jira/browse/FLINK-34901
> Project: Flink
> Issue Type: Bug
> Components: Connectors / JDBC
> Affects Versions: jdbc-3.1.2
> Reporter: ouyangwulin
> Priority: Critical
> Labels: pull-request-available
>
> When writing Postgres data using flinker-connector-jdbc, using upsert mode,
> we need only update no uniqueColumns to improve performance.
>
> Whether you can modify the code is as follows：
> String updateClause =
>
> {code:java}
> Arrays.stream(fieldNames)
> .filter(fieldName -> !Arrays.asList(uniqueKeyFields).contains(fieldName))
> .map(f -> quoteIdentifier(f) + "=EXCLUDED." + quoteIdentifier(f))
> .collect(Collectors.joining(", "));{code}
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