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Posted to issues@spark.apache.org by "Senthil Kumar (Jira)" <ji...@apache.org> on 2021/09/19 18:20:00 UTC

[jira] [Created] (SPARK-36801) Document change for Spark sql jdbc

Senthil Kumar created SPARK-36801:
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             Summary: Document change for Spark sql jdbc
                 Key: SPARK-36801
                 URL: https://issues.apache.org/jira/browse/SPARK-36801
             Project: Spark
          Issue Type: Documentation
          Components: Documentation
    Affects Versions: 3.1.2, 3.1.1, 3.1.0, 3.0.3, 3.0.2, 3.0.0
            Reporter: Senthil Kumar


Reading using Spark SQL jdbc DataSource  does not maintain nullable type and changes "non nullable" columns to "nullable".

So we need to add a note, in Documentation[1], "{color:#a9b7c6}All columns are automatically converted to be nullable for compatibility reasons.{color}"

 

[1 ]https://spark.apache.org/docs/latest/sql-data-sources-jdbc.html#jdbc-to-other-databases



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