Is ODBCFinish() mandatory?

When working with multirow ODBC functions, is it mandatory to call ODBCFinish() when done? More specifically, if call is hung up before ODBCFinish() is called, will it leave the database connection in unfinished state? Do I have to check for it in hangup handler? Consider this example from Asterisk: The Definitive guide.

exten => start,1,Verbose(1,Looping example with break)
   same => n,Set(ODBC_ID=${GET_ALL_AVAIL_EXTENS(1)})
   same => n(loop_start),NoOp()
   same => n,Set(ROW_RESULT=${ODBC_FETCH(${ODBC_ID})})
   same => n,GotoIf($["${ODBC_FETCH_RESULT}" = "FAILURE"]?cleanup,1)
   same => n,GotoIf($["${ROW_RESULT}" = "1104"]?good_exten,1)
   same => n,Goto(loop_start)

exten => cleanup,1,Verbose(1,Cleaning up after all iterations)
   same => n,Verbose(1,We did not find the extension we wanted)
   same => n,ODBCFinish(${ODBC_ID})
   same => n,Hangup()

exten => good_exten,1,Verbose(1,Extension we want is available)
   same => n,ODBCFinish(${ODBC_ID})
   same => n,Verbose(1,Perform some action we wanted)
   same => n,Hangup()

They are careful about calling ODBCFinish() before hangup, but it is not mentioned what happens if caller hungs up before ODBCFinish() is called.