Using wildcard for mandatory input parameters

Hi super-friends,

We have some calculation views that have input parameters.  These input parameters are automatically mandatory in our HANA rev 72.  When we pass a single parameter such as CUSTOMER to our query it works great and performance is good.  If we want ALL CUSTOMERS to display on the report we tried passing PERCENT (%) symbol in the parameter to return all values however the performance is horrible.  Has anybody found a better way to handle this?

ie: GOOD!

select * from "_SYS_BIC"."ourPackage/ourAmazingView"

(

'PLACEHOLDER' = ('$$IP_CUSTOMER$$', 'JOE DIRT INCORPORATED')

ie: NOT SO GOOD!

select * from "_SYS_BIC"."ourPackage/ourAmazingView"

(

'PLACEHOLDER' = ('$$IP_CUSTOMER$$', '%')

Something tells me somebody has a great suggestion for this one.  Many thanks in advance!

-Patrick