CE syntax with Placeholders and parameters

Hello Experts,

a) How can we convert a SQL syntax like:

SELECT .......FROM CV1

(

            PLACEHOLDER."$$ZIP_CV_DAT_GYTD_FROM$$" => :V_GYTDfrom )

WITH PARAMETERS ( 'PLACEHOLDER'=('$$ZV_CV_ATT_VENDOR$$', 'XXX') );

b) how to pass a Variable prompt from BO to HANA within the above syntax? with what do we need to replace XXX

Thanks & regards,

Jomy