Bug 132515 Expression like "Toltal.rank(Tolta.ave(row[a]),ture,Null,1)" is return an error
Description: Add an expression like "Toltal.rank(Tolta.ave(row[a]),ture,Null,1)" is return an error.The nesting "Toltal" seem not to be work. Step to reproduce: 1.new a datasource and dataset 2.drag the dataset to layout veiw for a table 3.set a group on the table 4.Insert a data into the group header with the expression e.g. "Toltal.rank(Tolta.ave(row[a]),ture,Null,1)" Actual result: An error was thrown out Expected result: It should work correctly in order to support some requirments
data/org.eclipse.birt.data/src/org/eclipse/birt/data/engine/expression/ExpressionProcessor.java
}
		return -1;
	}
	
	/**
	 * Clear the resources used in parser
	 */
	public void clear( )
	{
		tempRefactorCmpList = null;
		exprType =  COMPUTED_COLUMN_EXPR;
		if ( this.helper != null )
			this.helper.clear( );
	}
	public void prepareComputedColumns( IComputedColumnsState iccState )
	{
		this.computedColumnState = iccState;
		for( int i = 0; i < iccState.getCount(); i++ )
		{
			if( iccState.isValueAvailable( i ) )
				helper.addAvailableCmpColumn( iccState.getName(i));
		}
	}
	
	public void setDataSetMode( boolean isDataSetMode )
	{
		this.isDataSetMode = isDataSetMode;
		this.helper.setDataSetMode( isDataSetMode );
	}
}