Sean Owen commented on SPARK-17560:

It doesn't exist in Spark 1.4, and is an undocumented option. Behavior in 2.x 
is not necessarily the same as 1.x, and as i understand SQL is generally case 
insensitive now.

> SQLContext tables returns table names in lower case only
> --------------------------------------------------------
>                 Key: SPARK-17560
>                 URL: https://issues.apache.org/jira/browse/SPARK-17560
>             Project: Spark
>          Issue Type: Bug
>    Affects Versions: 2.0.0
>            Reporter: Aseem Bansal
> I registered a table using
> dataSet.createOrReplaceTempView("TestTable");
> Then I tried to get the list of tables using 
> sparkSession.sqlContext().tableNames()
> but the name that I got was testtable. It used to give table names in proper 
> case in Spark 1.4

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