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 {HEAD ~ the SQL compiler} is called to generate the executable object for use and storage in {TAIL ~ SQL cache} 22 
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 { HEAD ~ the SQL compiler } is called to generate the executable object for use and 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 HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH