[jira] [Resolved] (SPARK-10855) Add a JDBC dialect for Apache Derby

["Reynold Xin (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/SPARK-10855?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Reynold Xin resolved SPARK-10855.
---------------------------------
       Resolution: Fixed
         Assignee: Rick Hillegas
    Fix Version/s: 1.6.0

> Add a JDBC dialect for Apache  Derby
> ------------------------------------
>
>                 Key: SPARK-10855
>                 URL: https://issues.apache.org/jira/browse/SPARK-10855
>             Project: Spark
>          Issue Type: Improvement
>          Components: SQL
>    Affects Versions: 1.5.0
>            Reporter: Rick Hillegas
>            Assignee: Rick Hillegas
>            Priority: Minor
>             Fix For: 1.6.0
>
>
> In particular, it would be good if the dialect could handle Derby's user-defined types. The following script fails:
> {noformat}
> import org.apache.spark.sql._
> import org.apache.spark.sql.types._
> // the following script was used to create a Derby table
> // which has a column of user-defined type:
> // 
> // create type properties external name 'java.util.Properties' language java;
> // 
> // create function systemProperties() returns properties
> // language java parameter style java no sql
> // external name 'java.lang.System.getProperties';
> // 
> // create table propertiesTable( props properties );
> // 
> // insert into propertiesTable values ( null ), ( systemProperties() );
> // 
> // select * from propertiesTable;
> // cannot handle a table which has a column of type java.sql.Types.JAVA_OBJECT:
> //
> // java.sql.SQLException: Unsupported type 2000
> //
> val df = sqlContext.read.format("jdbc").options( 
>   Map("url" -> "jdbc:derby:/Users/rhillegas/derby/databases/derby1",
>   "dbtable" -> "app.propertiesTable")).load()
> // shutdown the Derby engine
> val shutdown = sqlContext.read.format("jdbc").options( 
>   Map("url" -> "jdbc:derby:;shutdown=true",
>   "dbtable" -> "")).load()
> exit()
> {noformat}
> The inability to handle user-defined types probably affects other databases besides Derby.



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