If no matching compilation environment data is found then new compilation environment data is added to the set for the statement in SQL cache 22 and the SQL compiler is called to generate the executable object for use and {HEAD ~ storage} in {TAIL ~ SQL cache} 22 
in
If no matching compilation environment data is found then new compilation environment data is added to the set for the statement in SQL cache 22 and the SQL compiler is called to generate the executable object for use and { HEAD ~ storage } in { TAIL ~ SQL cache } 22
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH