Lock avoidance using inspect:functions?

(:~ evaluate XQuery string, string is enriched with external variable
definitions for convenience :)
declare %updating function local:eval-update($exp as xs:string,$binds as
map(*)){
  let $decl:= map:keys($binds)!``[declare variable $`{ . }`
external;]``=>string-join("")
   return xquery:eval-update($decl || $exp, $binds)
};

declare %updating function local:eval-update2($exp as xs:string,$binds as
map(*)){
  let $decl:= map:keys($binds)!``[let $`{ . }` :=$binds("`{ . }`")
]``=>string-join("")
  let $mod:=("module namespace _='abuse'; declare %updating function
_:foo($binds){" , $decl, "return " , $exp , "};")=>string-join("")
  let $p:=file:create-temp-file("APB", ".xqm")
  let$_:=file:write-text($p,$mod)
  return updating inspect:functions($p)($binds)
};

(: note: the bind functionality is not used in this example)
let $binds:=map{"p1":42}
let $exp:="db:replace('factbook', 'abuse.xml', '<a/>')"
return  local:eval-update2($exp,$binds)