Nesting Depth: Wrong SQL Case handling

Hello,
In y_check_max_nesting_depth CASEs in SQL statements are not counted correctly. In the example, the method is shown with depth 7. As far as I understand the check logic, the "END" after the "SQL-CASE" is not respected.
Regards, Günter

method test_depth_7.
select from mara
fields matnr,
case mtart when 'QBMI' then 'X' end as f1,
case mtart when 'QBMU' then 'X' end as f2,
case mtart when 'QFHM' then 'X' end as f3,
case mtart when 'QPRO' then 'X' end as f4,
case mtart when 'QBMU' then 'X' end as f5,
case mtart when 'QBMV' then 'X' end as f6
where matnr = '4711'
into table @data(tmara).
if sy-subrc is initial.
sy-tvar0 = lines( tmara ).
endif.
endmethod.

Start by reproducing the reported depth-7 example in method test_depth_7 and trace the y_check_max_nesting_depth logic around SQL CASE and END handling. Done means the CASE expressions are counted correctly and the example produces the expected nesting depth, with a regression test covering the behavior.