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https://issues.apache.org/jira/browse/SPARK-59477?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Uroš Bojanić updated SPARK-59477:
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Component/s: SQL
(was: Spark Core)
> Add CSV write option treatNullAsEmptyString
> -------------------------------------------
>
> Key: SPARK-59477
> URL: https://issues.apache.org/jira/browse/SPARK-59477
> Project: Spark
> Issue Type: Bug
> Components: SQL
> Affects Versions: 4.2.0
> Reporter: Dejan Krakovic
> Assignee: Dejan Krakovic
> Priority: Major
> Labels: pull-request-available
>
> Adds a per-write CSV option {{treatNullAsEmptyString}} that overrides the
> session-level {{spark.sql.legacy.nullValueWrittenAsQuotedEmptyStringCsv}}
> config for a single write.
> When set to false, nulls are written as a bare, unquoted empty token while
> empty strings stay quoted ({{{}""{}}}), so downstream consumers can
> differentiate null from an empty string. When set to true, nulls are written
> as the {{{}emptyValue{}}}. When unset, the session config decides the
> behavior, so existing writes are unaffected.
> This lets a workload opt into the differentiation without changing the
> session/workspace default.
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