MII 12.1 Workbench - Empty Column List in Query editor

Hi all,
In my CE 7.2 I have deployed via JSPM MII 12.1
Everything seems ok on the overall installation side.
I have defined a DataServer (connector IDBC, Type SQL) connected to the local MaxDB instance.
The status is "Running" and everything seems ok.
I want to access tables created as result of DDic DC deploy.
The tables are actually there as I can see from NWA SQL console.
The error happens when I start the Workbench->new SQL Query->Fixed Query Details
The table is there in the list, but when I click on any table the column list stays empty (even for system tables)
I get the following errors in trace
Enter a table name
[EXCEPTION]
com.sap.xmii.Illuminator.logging.LHException: Enter a table name
at com.sap.xmii.Illuminator.logging.ErrorHandler.handleError(ErrorHandler.java:47)
at com.sap.xmii.Illuminator.connectors.IDBC.ColumnList.getData(ColumnList.java:33)
at com.sap.xmii.Illuminator.connectors.IDBC.DBMetaDataProcessor.getListData(DBMetaDataProcessor.java:115)
at com.sap.xmii.Illuminator.connectors.IDBC.DBMetaDataProcessor.processRequest(DBMetaDataProcessor.java:25)
at com.sap.xmii.Illuminator.connectors.IDBC.DataSource.doProcessRequest(DataSource.java:67)
at com.sap.xmii.Illuminator.connectors.AbstractConnector.processRequest(AbstractConnector.java:97)
at com.sap.xmii.Illuminator.server.QueryEngine.run(QueryEngine.java:39)
and several like
com.sap.security.api.NoSuchRoleException: Role with uniqueName super_admin_role not found!
Can anyone please help?
Thanks, regards
Vincenzo

Hi Diana,
thanks again for your support, I have only tried to connect to local MaxDB no Oracle, No MSSql
I am using the IDBC connection to local MaxDB instance, I have deployed the corresponding jdbc archive version.
The connection seems to be ok if the test query is something like "CURDATE()", but if I use a real query involving the table I'm interested in, it cannot be accessed and I get the "Enter table name" error again.
I believe you are right in that no SQL-enabled user exists after installation, only admin users exist
I am now trying to create an SQL-enabled user to perform queries, but it seems a bit awkward from command line.
If you have any suggestion other than looking at manuals (which I am already doing) feel free to suggest
The datasource method did not work, even though it would be the best one IMHO.
I tried to use the SAP/JPA_DEFAULT datasource with a different DataServer, but when loading the Table list in workbench I get: UnsupportedOperationException: unimplemented method isNull, which should be somehow related to jdbc driver
Maybe this second error could be somehow related to the CE 7.2 version Michael was correctly pointing at, since the driver used is the builtin SAP driver.
thanks for any suggestion
Thanks, regards
Vincenzo

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