Using Like or Contains kind in WEBI

Hi Experts,

How do I implement LIKE or CONTAINS kind of operator in WEBI report level.

I can't use Matches Pattern at query as I have to group a column based on report output values.

BEx based report, so can't implement this in Universe.

Requirement:

if ([ObjName] contains 'ABC') then ('QRS')

elseif  ( [ObjName] contains 'DEF') then ('TUV')

elseif([ObjName] contains 'FIG') then ('XUV')

elseif([ObjName] contains 'LMP')  then ('XYZ')

else ([ObjName])

BO Version - 4.1 SP5

Thanks in Advance

Harsha