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https://issues.apache.org/jira/browse/SPARK-20888?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16025059#comment-16025059
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Michael Allman commented on SPARK-20888:
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I will work on a PR for this and try to get it in ASAP.
> Document HiveCaseSensitiveInferenceMode.INFER_AND_SAVE in Spark SQL 2.1 to
> 2.2 migration notes
> ----------------------------------------------------------------------------------------------
>
> Key: SPARK-20888
> URL: https://issues.apache.org/jira/browse/SPARK-20888
> Project: Spark
> Issue Type: Task
> Components: Documentation, SQL
> Affects Versions: 2.2.0
> Reporter: Michael Allman
> Priority: Critical
>
> Spark 2.2 introduces a new default value for the SQL configuration setting,
> `spark.sql.hive.caseSensitiveInferenceMode`. The new default value is
> `HiveCaseSensitiveInferenceMode.INFER_AND_SAVE`. As this enables a behavior
> that differs from Spark 2.1, I believe this should be noted in the Spark SQL
> migration notes from 2.1 to 2.2.
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