Bug 136279 Structure and table datatypes should be hidden.
Description: Structure and table datatype should be hidden. Steps to reproduce: In table data binding, I saw structure and table two datatypes. They are not supported now, so they should be removed.
engine/org.eclipse.birt.report.engine/src/org/eclipse/birt/report/engine/adapter/ModelDteApiAdapter.java
String operand1 = modelFilter.getValue1( );
		String operand2 = modelFilter.getValue2( );
		return new FilterDefinition( new ConditionalExpression( column, dteOpr,
				operand1, operand2 ) );
	}
	private IColumnDefinition newColumnDefn( ResultSetColumnHandle modelColumn )
	{
		ColumnDefinition newColumn = new ColumnDefinition( modelColumn
				.getColumnName( ) );
		if ( modelColumn.getPosition( ) != null )
			newColumn
					.setColumnPosition( modelColumn.getPosition( ).intValue( ) );
		newColumn.setDataType( toDteDataType( modelColumn.getDataType( ) ) );
		return newColumn;
	}
	private void updateColumnDefn( ColumnDefinition dteColumn,
			ColumnHintHandle modelColumnHint )
	{
		assert dteColumn.getColumnName( ).equals(
				modelColumnHint.getColumnName( ) );
		dteColumn.setAlias( modelColumnHint.getAlias( ) );
		String exportConstant = modelColumnHint.getExport( );
		if ( exportConstant != null )
		{
			int exportHint = IColumnDefinition.DONOT_EXPORT; 
			if ( exportConstant
					.equals( DesignChoiceConstants.EXPORT_TYPE_IF_REALIZED ) )
				exportHint = IColumnDefinition.EXPORT_IF_REALIZED;
			else if ( exportConstant
					.equals( DesignChoiceConstants.EXPORT_TYPE_ALWAYS ) )