Bug 195970 Two issues when evaluate a query inlcuding a subquery[07]
Description: Currently, when evaluating a query which includes a subquery, the query will be evaluated twice. The binding of query will pass to subquery twice. If user write a java script such as new Date() and i++. The result of query will be incorrect. Another issue: when write the report document, the binding of query will be written twice and the performance is not good to evalulate it twice.
data/org.eclipse.birt.data/src/org/eclipse/birt/data/engine/impl/ResultIterator.java
"getSecondaryIterator",
				"Returns the secondary result specified by a SubQuery" );
		IResultIterator resultIt;
		try
		{
			resultIt = results.getResultIterator( );
		}
		catch ( BirtException e )
		{
			throw DataException.wrap( e );
		}
		
		if ( resultIt instanceof ResultIterator )
		{
			this.getRdSaveHelper( ).processForSubQuery( this.getQueryResults( )
					.getID( ),
					(ResultIterator) resultIt,
					subQueryName );
		}
		return resultIt;
	}
	
	/*
	 * @see org.eclipse.birt.data.engine.api.IResultIterator#getResultMetaData()
	 */
	public IResultMetaData getResultMetaData( ) throws DataException
	{
		try
		{
			return new ResultMetaData( odiResult.getResultClass( ) );