Data Model using Answers Logical SQL doesn't work with Date Parameters

Hello,

I was trying to create a Data Model using the "Oracle BI EE" Data source. Here I entered a Logical SQL and tried to define a Date From and Date To parameters to limit data.

The Logical SQL has the following form:

select

"Sales"."Fact - Sales"."Sales USD"

....

FROM

  "Sales"

WHERE

  (

    (

      "Invoice Date"."Date" BETWEEN DATE '2015-01-01' AND DATE '2015-01-15'

    )

This Logical SQL was retrieved from an Analysis with hard coded dates in the filters.

I changed the hard coded dates to :p_from_date and :p_to_date but the "Edit Data Set" window where you enter the sql does not accept it.