Need SQL for data model list of values for Time Card Time Type

Summary:

I need to add a parameter to a BI Publisher Report that has the values from the Time Type field from the Time Card.

I have the following SQL written for the list of values for the Time Type field, but the performance is really poor.

Content (required):

If there is another approach, I am happy to try it.

Version (include the version you are using, if applicable):

Code Snippet (add any code snippets that support your topic, if applicable):

SELECT 

            

        CASE

             WHEN REC.GRP_TYPE_ID = 202

                 THEN

                 (

                    SELECT DISTINCT

                        TA.ATTRIBUTE_CATEGORY

                    FROM

                        HWM_TM_REP_ATRB_USAGES TAU