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https://issues.apache.org/jira/browse/SPARK-38412?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Jungtaek Lim resolved SPARK-38412.
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Fix Version/s: 3.3.0
3.1.4
3.2.2
Assignee: Jungtaek Lim
Resolution: Fixed
Issue resolved via https://github.com/apache/spark/pull/35731
> `from` and `to` is swapped in the StateSchemaCompatibilityChecker
> -----------------------------------------------------------------
>
> Key: SPARK-38412
> URL: https://issues.apache.org/jira/browse/SPARK-38412
> Project: Spark
> Issue Type: Bug
> Components: Structured Streaming
> Affects Versions: 3.1.2, 3.2.1, 3.3.0
> Reporter: Jungtaek Lim
> Assignee: Jungtaek Lim
> Priority: Major
> Fix For: 3.3.0, 3.1.4, 3.2.2
>
>
> During the work in SPARK-38204, I figured out the parameter is swapped which
> led to test failure on new test (I disabled the schema check for now in the
> PR of SPARK-38204).
> That allows nullable column to be stored into non-nullable column, which
> should be prohibited. This is less likely making runtime problem since state
> schema is conceptual one and row can be stored even not respecting the state
> schema.
> The worse problem is happening in opposite way, that disallows non-nullable
> column to be stored into nullable column, which should be allowed. Spark
> fails the query for this case.
> We should fix this to allow the case properly.
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