Bug 191447 Repreview the Output Parameters in storedprocedure dataset will lead the exception
Description: Repreview the Output Parameters in storedprocedure dataset will lead the exception Build number: 2.2.0.v20070607-0630 Steps to reproduce: 1, Open the attached report design 2, Open the Data Set 3, Preview Output Parameters 4, Click OK button 5, Reopen the Data Set 6, Preview Output Parameters again Expected result: The preview should be successfully Actual result: Exception occurs Error log: org.eclipse.birt.data.engine.core.DataException: Cannot execute the statement. SQL statement does not return a ResultSet object. SQL error #1: Parameter #2 has not been set. at org.eclipse.birt.data.engine.odaconsumer.PreparedStatement.execute(PreparedStatement.java:567) at org.eclipse.birt.data.engine.executor.DataSourceQuery.execute(DataSourceQuery.java:494) at org.eclipse.birt.data.engine.impl.PreparedOdaDSQuery$OdaDSQueryExecutor.executeOdiQuery(PreparedOdaDSQuery.java:338) at org.eclipse.birt.data.engine.impl.QueryExecutor.execute(QueryExecutor.java:761) at org.eclipse.birt.data.engine.impl.ServiceForQueryResults.executeQuery(ServiceForQueryResults.java:216) at org.eclipse.birt.data.engine.impl.QueryResults.getResultIterator(QueryResults.java:152) at org.eclipse.birt.report.designer.data.ui.dataset.OutputParameterPreviewPage.updateResults(OutputParameterPreviewPage.java:256) at org.eclipse.birt.report.designer.data.ui.dataset.OutputParameterPreviewPage.access$1(OutputParameterPreviewPage.java:190) at org.eclipse.birt.report.designer.data.ui.dataset.OutputParameterPreviewPage$2.run(OutputParameterPreviewPage.java:165)
data/org.eclipse.birt.report.data.oda.jdbc.ui/src/org/eclipse/birt/report/data/oda/jdbc/ui/editors/SQLDataSetEditorPage.java
* 
	 * @return The Type of the object selected in the type combo ( Can be one of the following )
	 *   1) TABLE
	 *   2) VIEW
	 *   3) ALL
	 */
	private String getSelectedDbType( )
	{
		IStructuredSelection selection = (IStructuredSelection) filterComboViewer.getSelection( );
		String type = DbType.ALL_STRING;
		if ( selection != null && selection.getFirstElement( ) != null )
		{
			DbType dbType = (DbType) selection.getFirstElement( );
			switch ( dbType.getType( ) )
			{
				case DbType.TABLE_TYPE :
					type = DbType.TABLE_STRING;
					break;
				case DbType.VIEW_TYPE :
					type = DbType.VIEW_STRING;
					break;
				case DbType.PROCEDURE_TYPE :
					type = DbType.PROCEDURE_STRING;
					break;
			}
		}
		return type;
	}
	/**
	 * @param item A tree Item which has to be tested