Additional Search operation in CRM My Account App

Hello Experts,

I need one help , I have a requirement to search my account depend on City.

currently search operation available only for Name.

I have checked that existing logic is not in frontend side , it is in the backend side.

And in backed logic only for table BUT000. Can you please help me how to add logic for search account with City ??

The Class Name: CL_CRM_BP_ODATA_RT_ACCOUNT

Method Name: GENERATE_SELECT_FOR_ENTITYSET

I have attached the screenshot of existing code.search1.jpg