I think your query is wrong, you can grab the sample query when you run the view , go to raw data, click on show log and check the actual sql. It should be more like...
select "PRODUCT_TEMP_NAME", "REGIO_TEMP_NAME", "SUB_REGIO_TEMP_NAME",
SUM("SALES_TEMP_AMOUNT"),
SUM( "net_amount")
FROM "_SYS_BIC"."HANA/CALC_VIEW_IPAR"
('PLACEHOLDER' = ('$$IM_DISC$$', '10'))
WHERE ("REGION_NAME" IN ('Asia') )
GROUP BY "PRODUCT_TEMP_NAME", "REGIO_TEMP_NAME", "SUB_REGIO_TEMP_NAME";