Github user BrianOn99 commented on the issue:

    https://github.com/apache/incubator-predictionio/pull/401
  
    I am using predicitonio 0.11 with postgres, and meet this issue 
`java.lang.ClassNotFoundException: jdbc.StorageClient` when using `pio-shell` 
when trying the tutorial 
https://predictionio.incubator.apache.org/datacollection/eventmodel/
    
    As 0.12 is not released, I tried to apply this patch to 0.11 by appending 
`pio-data-jdbc-assembly-0.11.0-incubating.jar` to the `--jars` flag in 
`pio-shell` file, but then another error pops up
    ```
    java.sql.SQLException: No suitable driver found for 
jdbc:postgresql://localhost/pio
            at java.sql.DriverManager.getConnection(DriverManager.java:689)
            at java.sql.DriverManager.getConnection(DriverManager.java:247)
    ```
    
    Is it necessary to patch `Common.scala` and recompile?
    
    Or is there another way to do the same thing as 
`PEventStore.aggregateProperties` as shown in the tutorial without `pio-shell`?
    
    I really hope to have some help to be shown in the tutorial otherwise other 
newcomers like me will be confused.


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