Bug 199021 Error message pops up several times when click an invalid dataset
Description: There is a sqlserver datasource and dataset, remove the jtds driver to let the dataset invalid. Double click on the dataset, the error message will pop up serveral times. Build version:2.2.0.v20070807-0630 Steps to reproduce: 1. Create a sqlserver datasource and dataset. 2. Remove the jtds driver, and the dataset will be invalid. 3. Double click on the dataset. Expect result: Error message pops up once to indicate the problem. Actual result: Error message pops up serveral times.
data/org.eclipse.birt.report.data.oda.jdbc.ui/src/org/eclipse/birt/report/data/oda/jdbc/ui/provider/JdbcMetaDataProvider.java
}
			}
			catch ( SQLException e )
			{
				logger.log( Level.FINE, e.getMessage( ), e );
			}
		}
		return columnList;
	}
 	/**
 	 * is procedure supported
 	 */
	public boolean isProcedureSupported( )
	{
		metaData = getMetaData( );
		try
		{
			if ( metaData != null )
			{
				return ( metaData.supportsStoredProcedures( ) );
			}
		}
		catch ( SQLException e )
		{
			logger.log( Level.FINE, e.getMessage( ), e );
		}
		return false;
	}
	
    /*