may be this will help you to solve the problem
PROCEDURE PROC_LOV_OFF_BRANCH IS
lov_id LOV;
rg_name VARCHAR2(40) := 'branch_code_type';
rg_id RecordGroup;
errcode NUMBER;
QERY VARCHAR2(1000);
BEGIN
if :global.gv_type = 'BO' THEN
QERY := 'select branch_code,branch_name,type,region_code,region_name,
controlling_code,cntr_name,ac_center_code,ac_name from fav_offices
WHERE TYPE = ''BO''AND REGION_CODE = :global.gv_REG_CODE
AND CONTROLLING_CODE = :GLOBAL.GV_cntr_code
AND AC_CENTER_CODE = :GLOBAL.GV_acct_code
ORDER BY BRANCH_CODE';
ELSIF :global.gv_type = 'CO' THEN
QERY := 'select branch_code,branch_name,type,region_code,region_name,
controlling_code,cntr_name,ac_center_code,ac_name from fav_offices
WHERE TYPE IN(''CO'', ''BO'')
AND REGION_CODE = :global.gv_REG_CODE
AND controlling_CODE = :GLOBAL.GV_cntr_code
ORDER BY TYPE, BRANCH_CODE';
ELSIF :global.gv_type = 'RO' THEN
QERY := 'select branch_code,branch_name,type,region_code,region_name,
controlling_code,cntr_name,ac_center_code,ac_name from fav_offices
WHERE TYPE IN(''CO'', ''BO'',''RO'')
AND REGION_CODE = :global.gv_REG_CODE
ORDER BY TYPE, BRANCH_CODE';
END IF;
rg_id := Find_Group( rg_name );
IF not Id_Null(rg_id) THEN
delete_group(rg_id);
end if;
rg_id := Create_Group_From_Query( rg_namE,QERY);
errcode := Populate_Group( rg_id );
lov_id := Find_LOV('lov_def_reg');
Set_LOV_Property(lov_id,GROUP_NAME,'BRANCH_CODE_TYPE');
IF FORM_SUCCESS THEN
DECLARE
A BOOLEAN := FALSE;
BEGIN
LOOP
EXIT WHEN A = TRUE;
MESSAGE('Please choose one value to exit from list');
A := SHOW_LOV('lov_def_reg');
END LOOP;
END;
END IF;
END ;
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