Bug 213981 [Automation] [Regression] Exception is thrown out when preview the attached report design [07]
engine/org.eclipse.birt.report.engine/src/org/eclipse/birt/report/engine/internal/document/v4/ExtendedItemExecutor.java
}
			}
		}
		executeQuery( );
	}
	
	protected void executeQuery( )
	{
		getParentResultSet( );
		/*
		 * we needn't skip to the first row as other report items.
		 */
		if ( design != null )
		{
			boolean useCache = design.useCachedResult( );
			IDataQueryDefinition[] queries = design.getQueries( );
			if ( queries != null )
			{
				rsets = new IBaseResultSet[queries.length];
				try
				{
					IBaseResultSet prset = restoreParentResultSet( );
					for ( int i = 0; i < queries.length; i++ )
					{
						rsets[i] = context.executeQuery( prset, queries[i],
								useCache );
					}
					context.setResultSets( rsets );
				}
				catch ( BirtException ex )