Bug 207561 [Regression] Conversion errror when preview the attached report design
data/org.eclipse.birt.report.data.oda.jdbc.ui/src/org/eclipse/birt/report/data/oda/jdbc/ui/editors/SQLDataSetEditorPage.java
setMessage( DEFAULT_MESSAGE, IMessageProvider.NONE );
		setPageLayout( );
		prevDataSourceDesign = this.getDataSetDesign( ).getDataSourceDesign( );
		prepareUI( );
	}
	/**
	 * 
	 *
	 */
	private void initializeSchemaPrefetchConfig( )
	{
		if ( !JdbcPlugin.getDefault( )
				.getPluginPreferences( )
				.contains( DateSetPreferencePage.SCHEMAS_PREFETCH_CONFIG ) )
		{
			JdbcPlugin.getDefault( )
					.getPluginPreferences( )
					.setValue( DateSetPreferencePage.SCHEMAS_PREFETCH_CONFIG,
							ENABLED );
		}
	}
	/**
	 * Creates the composite, for displaying the list of available db objects
	 * 
	 * @param parent
	 */
	private Control createTableSelectionComposite( Composite parent )
	{
		Composite tablescomposite = new Composite( parent, SWT.NONE );
		GridLayout layout = new GridLayout( );