CHECK_38 - Avoid use of SELECT-ENDSELECT

RFC enabled
CODE

SELECT * FROM db1 INTO struc1.
...
ENDSELECT.

Should be changed to

SELECT * FROM db1 INTO TABLE itab1.

Exception: SELECT UP TO n ROWS

SELECT * FROM db1 UP TO 1 ROWS INTO struc1
  WHERE key2 = value2.
ENDSELECT.  

Make sure to check the relevant development guidelines, SELECT SINGLE is in some cases easier to read and understand than UP TO 1 ROWS + ENDSELECT