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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